SPICE MODEL of TC74VCX245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.

1. Device Modeling Report
COMPONENTS : CMOS DIGITAL INTEGRATED CIRCUIT
PART NUMBER : TC74VCX245FT
MANUFACTURER : TOSHIBA
Bee Technologies Inc.
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

2. Truth Table
Circuit simulation result
U1:OEBAR 0
U1:DIR 0
SEL>>
4.0V
2.0V
0V
V(U1:A1) V(U1:A2) V(U1:A3) V(U1:A4) V(U1:A5)
V(U1:A6) V(U1:A7) V(U1:A8)
5.0V
2.5V
0V
0s 0.5us 1.0us
V(IN_B)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE LO
A2 B1
IN_B
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
A7 B6 3.6
A8 B7 CLK
GND B8 DSTM1
ONTIME = .2uS
OFFTIME = .2uS
74VCX245
0
Comparison table Function : A BUS = OUTPUT, B BUS = INPUT
Input Output
%Error
OE DIR Measurement Simulation
L L A=B A=B 0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

3. Truth Table
Circuit simulation result
U1:OEBAR 0
U1:DIR 1
SEL>>
4.0V
2.0V
0V
V(U1:B1) V(U1:B2) V(U1:B3) V(U1:B4) V(U1:B5)
V(U1:B6) V(U1:B7) V(U1:B8)
5.0V
2.5V
0V
0s 0.5us 1.0us
V(IN_A)
Time
Evaluation circuit
U1
HI
DIR VCC
___
A1 OE
IN_A LO
A2 B1
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
CLK A7 B6 3.6
DSTM1 A8 B7
ONTIME = .2uS
OFFTIME = .2uS GND B8
74VCX245
0
Comparison table Function : A BUS = INPUT, B BUS = OUTPUT
Input Output
%Error
OE DIR Measurement Simulation
L H B=A B=A 0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

4. Truth Table
Circuit simulation result
U1:OEBAR 1
U1:DIR 1
SEL>>
2.0V
0V
V(U1:B1) V(U1:B2) V(U1:B3) V(U1:B4) V(U1:B5)
V(U1:B6) V(U1:B7) V(U1:B8)
2.0V
0V
0s 0.5us 1.0us
V(U1:A1) V(U1:A2) V(U1:A3) V(U1:A4) V(U1:A5)
V(U1:A6) V(U1:A7) V(U1:A8)
Time
Evaluation circuit
U1
DSTM1
CLK DIR VCC
___
ONTIME = .2uS A1 OE HI
OFFTIME = .2uS
A2 B1
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
A7 B6 3.6
A8 B7
GND B8
74VCX245
0
Comparison table Function : A BUS and B BUS = HIGH IMPEDANCE
Input Output
%Error
OE DIR Measurement Simulation
H X Z Z 0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

5. High Level and Low Level Input Voltage (2.7 V < VCC ≤ 3.6 V)
Circuit simulation result
4.0V
Output
(560.616u,2.0003)
2.0V Input
(524.214u,799.069m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
V1 = 0
R2 A6 B5 V2 = 3.3 V1 3.3
TD = 0.5m
1G A7 B6 TR = 0.1m
TF = 0.1m
A8 B7 PW = 1m
PER = 2m
GND B8
74VCX245
0
Comparison table
VCC = 3.3 V Measurement Simulation %Error
VIH (V) 2 2 0
VIL (V) 0.8 0.799069 -0.116
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

6. High Level and Low Level Input Voltage (2.3 V ≤ VCC ≤ 2.7 V)
Circuit simulation result
3.0V
2.0V
(563.998u,1.6000) Output
Input
1.0V
(527.963u,699.080m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
__ U1
1OE VCC
LO
__
1A1 2OE
LO
2Y4 1Y1
OUT
1A2 2A4
2Y3 1Y2 V2
V1 = 0 V1 1A3 2A3
V2 = 2.5 R1
TD = 0.5m 2Y2 1Y3 2.5
TR = 0.1m 1G
TF = 0.1m 1A4 2A2
PW = 1m
PER = 2m 2Y1 1Y4
GND 2A1
74VCX244
0
Comparison table
VCC = 2.5 V Measurement Simulation %Error
VIH (V) 1.6 1.6 0
VIL (V) 0.7 0.699080 -0.131
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

7. High Level and Low Level Input Voltage (1.65 V ≤ VCC < 2.3 V)
Circuit simulation result
2.0V
(565.008u,1.1702)
Output
1.0V Input
(519.907u,358.320m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
__ U1
1OE VCC
LO
__
1A1 2OE
LO
2Y4 1Y1
OUT
1A2 2A4
2Y3 1Y2 V2
V1 = 0 V1 1A3 2A3
V2 = 1.8 R1
TD = 0.5m 2Y2 1Y3 1.8
TR = 0.1m 1G
TF = 0.1m 1A4 2A2
PW = 1m
PER = 2m 2Y1 1Y4
GND 2A1
74VCX244
0
Comparison table
VCC = 1.8 V Measurement Simulation %Error
Min VIH = (VCC*0.65) (V) 1.17 1.1702 0.017
Max VIL = (VCC*0.2) (V) 0.36 0.358320 -0.467
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

8. High Level and Low Level Input Voltage (1.4 V ≤ VCC < 1.65 V)
Circuit simulation result
1.5V
(565.017u,975.248m)
1.0V
Output
Input
0.5V
(504.995u,74.927m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
__ U1
1OE VCC
LO
__
1A1 2OE
LO
2Y4 1Y1
OUT
1A2 2A4
2Y3 1Y2 V2
V1 = 0 V1 1A3 2A3
V2 = 1.5 R1
TD = 0.5m 2Y2 1Y3 1.5
TR = 0.1m 1G
TF = 0.1m 1A4 2A2
PW = 1m
PER = 2m 2Y1 1Y4
GND 2A1
74VCX244
0
Comparison table
VCC = 1.5 V Measurement Simulation %Error
Min VIH = (VCC*0.65) (V) 0.975 0.975248 0.025
Max VIL = (VCC*0.05) (V) 0.075 0.074927 -0.097
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

9. High Level and Low Level Input Voltage (1.2 V ≤ VCC < 1.4 V)
Circuit simulation result
1.2V
(580.042u,960.500m)
0.8V
Output
Input
0.4V
(504.990u,59.885m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
__ U1
1OE VCC
LO
__
1A1 2OE
LO
2Y4 1Y1
OUT
1A2 2A4
2Y3 1Y2 V2
V1 = 0 V1 1A3 2A3
V2 = 1.2 R1
TD = 0.5m 2Y2 1Y3 1.2
TR = 0.1m 1G
TF = 0.1m 1A4 2A2
PW = 1m
PER = 2m 2Y1 1Y4
GND 2A1
74VCX244
0
Comparison table
VCC = 1.2 V Measurement Simulation %Error
Min VIH = (VCC*0.8) (V) 0.96 0.9605 0.052
Max VIL = (VCC*0.05) (V) 0.06 0.059885 -0.192
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

10. High Level Output Voltage (2.7 V < VCC ≤ 3.6 V)
Circuit simulation result
3.0V
Output
2.0V
1.0V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
I1 A6 B5 V1 3.3
2.1
-100u A7 B6
A8 B7
GND B8
74VCX245
0
Comparison table
VIN = VIH, VCC = 3.3 V Measurement Simulation %Error
Min VOH = (VCC - 0.2) V 3.1 3.1167 0.539
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

11. Low Level Output Voltage (2.7 V < VCC ≤ 3.6 V)
Circuit simulation result
3.0V
2.0V Output
1.0V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
I1 A6 B5 V1 3.3
0.7
100u A7 B6
A8 B7
GND B8
74VCX245
0
Comparison table
VIN = VIL, VCC = 3.3 V Measurement Simulation %Error
VOL (V) 0.2 0.207763 3.882
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

12. High Level Output Voltage (2.3 V ≤ VCC ≤ 2.7 V)
Circuit simulation result
2.5V
2.0V
Output
1.0V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
I1 A6 B5 V1 2.5
1.7
-100u A7 B6
A8 B7
GND B8
74VCX245
0
Comparison table
VIN = VIH, VCC = 2.5 V Measurement Simulation %Error
Min VOH = (VCC - 0.2) V 2.3 2.3139 0.604
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

13. Low Level Output Voltage (2.3 V ≤ VCC ≤ 2.7 V)
Circuit simulation result
2.5V
2.0V
Output
1.0V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
I1 A6 B5 V1 2.5
0.6
100u A7 B6
A8 B7
GND B8
74VCX245
0
Comparison table
VIN = VIL, VCC = 2.5 V Measurement Simulation %Error
VOL (V) 0.2 0.202055 1.028
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

14. High Level Output Voltage (1.65 V ≤ VCC < 2.3 V)
Circuit simulation result
1.5V
Output
1.0V
0.5V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I1 A6 B5 V1 V2
0.3
100u A7 B6
A8 B7 1.8
GND B8
74VCX245
0
Comparison table
VIN = VIH, VCC = 1.8 V Measurement Simulation %Error
Min VOH = (VCC - 0.2) V 1.6 1.6127 0.794
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

15. Low Level Output Voltage (1.65 V ≤ VCC < 2.3 V)
Circuit simulation result
1.5V
1.0V Output
0.5V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I1 A6 B5 V1 V2
0.3
100u A7 B6
A8 B7 1.8
GND B8
74VCX245
0
Comparison table
VIN = VIL, VCC = 1.8 V Measurement Simulation %Error
VOL (V) 0.2 0.198052 -0.974
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

16. High Level Output Voltage (1.4 V ≤ VCC < 1.65 V)
Circuit simulation result
1.5V
1.0V
Output
0.5V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I12 A6 B5 V1 V2
1
-100u A7 B6
A8 B7 1.5
GND B8
74VCX245
0
Comparison table
VIN = VIH, VCC = 1.5 V Measurement Simulation %Error
Min VOH = (VCC - 0.2) V 1.3 1.3148 1.138
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

17. Low Level Output Voltage (1.4 V ≤ VCC < 1.65 V)
Circuit simulation result
1.5V
1.0V
Output
0.5V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I12 A6 B5 V1 V2
0.07
100u A7 B6
A8 B7 1.5
GND B8
74VCX245
0
Comparison table
VIN = VIL, VCC = 1.5 V Measurement Simulation %Error
VOL (V) 0.05 0.047899 -4.202
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

18. High Level Output Voltage (1.2 V ≤ VCC < 1.4 V)
Circuit simulation result
1.2V
0.8V
Output
0.4V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I12 A6 B5 V1 V2
1
-100u A7 B6
A8 B7 1.2
GND B8
74VCX245
0
Comparison table
VIN = VIH, VCC = 1.2 V Measurement Simulation %Error
Min VOH = (VCC - 0.1) V 1.1 1.1002 0.018
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

19. Low Level Output Voltage (1.2 V ≤ VCC < 1.4 V)
Circuit simulation result
1.5V
1.0V
Output
0.5V
0V
0s 5ms 10ms
V(OUT)
Time
Evaluation circuit
U1
DIR VCC
LO
___
A1 OE
OUT LO
A2 B1
A3 B2
A4 B3
A5 B4
I12 A6 B5 V1 V2
0.05
100u A7 B6
A8 B7 1.2
GND B8
74VCX245
0
Comparison table
VIN = VIL, VCC = 1.2 V Measurement Simulation %Error
VOL (V) 0.05 0.048448 -3.104
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

20. Propagation Delay Time ( VCC = 1.2 V)
Circuit simulation result
1.2V 1.2V
1 2
0.8V 0.8V
Output
Input
0.4V 0.4V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPLH_TPHL) 2 V(U1:B1)
Time
Evaluation circuit
U1
DIR VCC
LO
tplh_tphl ___
A1 OE LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
R1 C1 V1 = 0
A6 B5 V2 = 1.2 1.2
2K 15p TD = 0.2u V1
A7 B6 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 K
VCC = 1.2 V, tr=tf= 2 ns Measurement Simulation %Error
tpLH (ns) 42 41.775 -0.536
tpHL (ns) 42 41.761 -0.569
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

21. Propagation Delay Time ( VCC = 1.5 V)
Circuit simulation result
1.5V 1.5V
1 2
1.0V 1.0V
Output
Input
0.5V 0.5V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPLH_TPHL) 2 V(U1:B1)
Time
Evaluation circuit
U1
DIR VCC
LO
tplh_tphl ___
A1 OE LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
R1 C1 V1 = 0
A6 B5 V2 = 1.5 1.5
2K 15p TD = 0.2u V1
A7 B6 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 K
VCC = 1.5 V, tr=tf= 2 ns Measurement Simulation %Error
tpLH (ns) 16.8 16.430 -2.202
tpHL (ns) 16.8 16.628 -1.024
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

22. Propagation Delay Time ( VCC = 1.8 V)
Circuit simulation result
2.0V 2.0V
1 2
Output
1.0V 1.0V Input
>>
0V 0V
0s 0.5us 1.0us
1 V(TPLH_TPHL) 2 V(U1:B1)
Time
Evaluation circuit
U1
DIR VCC
LO
tplh_tphl ___
A1 OE LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
R1 C1 V1 = 0
A6 B5 V2 = 1.8 1.8
500 30p TD = 0.2u V1
A7 B6 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 1.8 V, tr=tf= 2 ns Measurement Simulation %Error
tpLH (ns) 8.4 8.2719 -1.525
tpHL (ns) 8.4 8.3228 -0.919
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

23. Propagation Delay Time ( VCC = 2.5 V)
Circuit simulation result
3.0V 3.0V
1 2
2.0V 2.0V
Output
Input
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPLH_TPHL) 2 V(U1:B1)
Time
Evaluation circuit
U1
DIR VCC
LO
tplh_tphl ___
A1 OE LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
R1 C1 V1 = 0
A6 B5 V2 = 2.5 2.5
500 30p TD = 0.2u V1
A7 B6 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 2.5 V, tr=tf= 2 ns Measurement Simulation %Error
tpLH (ns) 4.2 4.1483 -1.231
tpHL (ns) 4.2 4.2043 0.102
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

24. Propagation Delay Time ( VCC = 3.3)
Circuit simulation result
3.0V 3.0V
1 2
2.0V 2.0V
Output
Input
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPLH_TPHL) 2 V(U1:B1)
Time
Evaluation circuit
U1
DIR VCC
LO
tplh_tphl ___
A1 OE LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
R1 C1 V1 = 0
A6 B5 V2 = 2.7 3.3
500 30p TD = 0.2u V1
A7 B6 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 3.3 V, tr=tf= 2 ns Measurement Simulation %Error
tpLH (ns) 3.5 3.4489 -1.460
tpHL (ns) 3.5 3.4608 -1.120
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

25. Output enable time(tPZH) and Output disable time(tPHZ) ( VCC = 1.2)
Circuit simulation result
1.2V 1.2V
1 2
Output
Input
0.8V 0.8V
0.4V 0.4V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZH_TPHZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
tpzh_tphz ___
A1 OE
A2 B1
A3 B2
A4 B3
V1 V2
A5 B4
R2 R1 C1 V3 V1 = 0
A6 B5 V2 = 1.2
2K 2K 15p TD = 0.2u 1.2
A7 B6 1 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 k
VCC =1.2 V, tr=tf= 2 ns Measurement Simulation %Error
tPHZ (ns) 36 35.665 -0.931
tpZH (ns) 49 48.407 -1.210
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

26. Output enable time(tPZH) and Output disable time(tPHZ) ( VCC = 1.5)
Circuit simulation result
1.5V 1.5V
1 2
Output
Input
1.0V 1.0V
0.5V 0.5V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZH_TPHZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
tpzh_tphz ___
A1 OE
A2 B1
A3 B2
A4 B3
V1 V2
A5 B4
R2 R1 C1 V3 V1 = 0
A6 B5 V2 = 1.5
2K 2K 15p TD = 0.2u 1.5
A7 B6 1 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 k
VCC =1.5 V, tr=tf= 2 ns Measurement Simulation %Error
tPHZ (ns) 14.4 14.343 -0.396
tpZH (ns) 19.6 19.422 -0.908
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

27. Output enable time(tPZH) and Output disable time(tPHZ) ( VCC = 1.8)
Circuit simulation result
1.5V 2.0V
1 2
Output
Input
1.0V
1.0V
0.5V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZH_TPHZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
tpzh_tphz ___
A1 OE
A2 B1
A3 B2
A4 B3
V1 V2
A5 B4
R2 R1 C1 V3 V1 = 0
A6 B5 V2 = 1.8
500 500 30p TD = 0.2u 1.8
A7 B6 1.5 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC =1.8 V, tr=tf= 2 ns Measurement Simulation %Error
tPHZ (ns) 7.2 7.1372 -0.872
tpZH (ns) 9.8 9.728 -0.735
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

28. Output enable time(tPZH) and Output disable time(tPHZ) ( VCC = 2.5)
Circuit simulation result
3.0V 3.0V
1 2
Output
Input
2.0V 2.0V
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZH_TPHZ) 2 V(U1:OEBAR)
Time
Evaluation circuit
U1
DIR VCC
LO
tpzh_tphz ___
A1 OE
A2 B1
A3 B2
A4 B3
V1 V2
A5 B4
R2 R1 C1 V3 V1 = 0
A6 B5 V2 = 2.5
500 500 30p TD = 0.2u 2.5
A7 B6 2 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC =2.5 V, tr=tf= 2 ns Measurement Simulation %Error
tPHZ (ns) 4.0 4.0101 0.253
tpZH (ns) 5.6 5.5637 -0.648
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

29. Output enable time(tPZH) and Output disable time(tPHZ) ( VCC = 3.3)
Circuit simulation result
3.0V 3.0V
1 2
Output
Input
2.0V 2.0V
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZH_TPHZ) 2 V(U1:OEBAR)
Time
Evaluation circuit
U1
DIR VCC
LO
tpzh_tphz ___
A1 OE
A2 B1
A3 B2
A4 B3
V1 V2
A5 B4
R2 R1 C1 V3 V1 = 0
A6 B5 V2 = 2.7
500 500 30p TD = 0.2u 3.3
A7 B6 2.5 TR = 2.5n
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 3.3 V, tr=tf= 2 ns Measurement Simulation %Error
tPHZ (ns) 3.6 3.5127 -2.425
tpZH (ns) 4.5 4.3381 -3.598
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

30. Output enable time (tPZL) and Output disable time (tPLZ) ( VCC = 1.2)
Circuit simulation result
1.2V 1.2V
1 2
Output
Input
0.8V 0.8V
0.4V 0.4V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZL_TPLZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
R2 tpzl_tplz ___
A1 OE
2k
A2 B1
A3 B2
A4 B3
V2 A5 B4 V1 V3
V1 = 0
R1 C1 A6 B5 V2 = 1.2
TD = 0.2u
2.4 2k 15p A7 B6 TR = 2.5n 1.2
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 k
VCC =1.2 V, tr=tf= 2 ns Measurement Simulation %Error
tPLZ (ns) 36 35.485 -1.431
tpZL (ns) 49 48.771 -0.467
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

31. Output enable time (tPZL) and Output disable time (tPLZ) ( VCC = 1.5)
Circuit simulation result
1.5V 1.5V
1 2
Output
Input
1.0V 1.0V
0.5V 0.5V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZL_TPLZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
R2 tpzl_tplz ___
A1 OE
2k
A2 B1
A3 B2
A4 B3
V2 A5 B4 V1 V3
V1 = 0
R1 C1 A6 B5 V2 = 1.5
TD = 0.2u
3 2k 15p A7 B6 TR = 2.5n 1.5
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 15 pF, RL = 2 k
VCC =1.5 V, tr=tf= 2 ns Measurement Simulation %Error
tPLZ (ns) 14.4 14.127 -1.896
tpZL (ns) 19.6 19.441 -0.811
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

32. Output enable time (tPZL) and Output disable time (tPLZ) ( VCC = 1.8)
Circuit simulation result
2.0V 2.0V
1 2
Output
Input
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZL_TPLZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
R2 tpzl_tplz ___
A1 OE
500
A2 B1
A3 B2
A4 B3
V2 A5 B4 V1 V3
V1 = 0
R1 C1 A6 B5 V2 = 1.8
TD = 0.2u
3.6 500 30p A7 B6 TR = 2.5n 1.8
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC =1.8 V, tr=tf= 2 ns Measurement Simulation %Error
tPLZ (ns) 7.2 7.0614 -1.925
tpZL (ns) 9.8 9.721 -0.806
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

33. Output enable time (tPZL) and Output disable time (tPLZ) ( VCC = 2.5)
Circuit simulation result
3.0V 3.0V
1 2
Output
Input
2.0V 2.0V
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZL_TPLZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
R2 tpzl_tplz ___
A1 OE
500
A2 B1
A3 B2
A4 B3
V2 A5 B4 V1 V3
V1 = 0
R1 C1 A6 B5 V2 = 2.5
TD = 0.2u
5 500 30p A7 B6 TR = 2.5n 2.5
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 2.5 V, tr=tf= 2 ns Measurement Simulation %Error
tPLZ (ns) 4 3.9939 -0.153
tpZL (ns) 5.6 5.4786 -2.168
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

34. Output enable time (tPZL) and Output disable time (tPLZ) ( VCC = 3.3)
Circuit simulation result
3.0V 3.0V
1 2
Output
Input
2.0V 2.0V
1.0V 1.0V
>>
0V 0V
0s 0.5us 1.0us
1 V(TPZL_TPLZ) 2 V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
R2 tpzl_tplz ___
A1 OE
500
A2 B1
A3 B2
A4 B3
V2 A5 B4 V1 V3
V1 = 0
R1 C1 A6 B5 V2 = 2.7
TD = 0.2u
6 500 30p A7 B6 TR = 2.5n 3.3
TF = 2.5n
A8 B7 PW = 0.5u
PER = 1u
GND B8
74VCX245
0
Comparison table CL = 30 pF, RL = 500 
VCC = 3.3 V, tr=tf= 2 ns Measurement Simulation %Error
tPLZ (ns) 3.6 3.5963 -0.103
tpZL (ns) 4.5 4.4497 -1.118
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005