1. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Device Modeling Report
Bee Technologies Inc.
COMPONENTS : CMOS DIGITAL INTEGRATED CIRCUIT
PART NUMBER : TC74VHC244FT
MANUFACTURER : TOSHIBA
5. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
L L L L 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
V1
5
R1
1MEG
LO
LO
0
LO
LO
LO
LO
LO
LO
LO
LO
6. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
L H H H 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
HI
HI
HI
HI
HI
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
HI
LO
0
R1
1MEG
HI
HI LO
V1
5
7. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
H X Z Z 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
1
1
0
0
0
0
0
0
0
0
Z
Z
Z
Z
Z
Z
Z
Z
R1
1MEG
CLK
DSTM1
OFFTIME = .2uS
ONTIME = .2uS
X
V1
5
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
X
0
HI
HI
8. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
High Level and Low Level Input Voltage
Circuit simulation result
Evaluation circuit
Comparison table
VCC = 5 V Measurement Simulation %Error
Min VIH = (VCC*0.7) V 3.5 3.6252 3.577
Min VIL = (VCC*0.3) V 1.5 1.4951 -0.327
Time
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
0V
2.0V
4.0V
6.0V
(529.901u,1.4951)
(572.504u,3.6252)
Output
Input
V1
TD = 0.5m
TF = 0.1m
PW = 1m
PER = 2m
V1 = 0
TR = 0.1m
V2 = 5
LO
LO
V2
5
0
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
OUT
R3
1MEG
9. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
High Level and Low Level Output Voltage
Circuit simulation result
Evaluation circuit
Comparison table
VCC = 4.5V Measurement Simulation %Error
VOH (V) 4.5 4.4978 -0.049
VOL (V) 0 0 0
Time
0s 5ms 10ms
V(U1:1A1)
0V
2.5V
5.0V
V(OUT)
0V
2.5V
5.0V
SEL>>
Output
Input
LO
0
R1
0.09MEG
V2
4.5
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
V1TD = 0.5m
TF = 3n
PW = 1m
PER = 2m
V1 = 0
TR = 3n
V2 = 4.5
LO