This document summarizes the modeling and simulation of a Toshiba TC74ACT245FW CMOS digital integrated circuit. It includes the component details, truth tables showing the input-output relationships under different conditions, timing diagrams of the circuit simulation results, and comparison tables evaluating the simulation against measurements for key timing parameters and voltage levels. The report finds good agreement between simulation and measurement, with less than 1% error in most cases.
SPICE MODEL of TC74VHCT245AF in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
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SPICE MODEL of TC74VHCT245AFT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHCT245AFW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC245F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC245FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX245F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX245FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
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SPICE MODEL of TC74ACT640F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VCX245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX245FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC640FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT640P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VCX245FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74VHC541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT541FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT541P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74ACT541FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC541FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC541FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74AC541P in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX541FW in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX541F in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TC74LCX541FT in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
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1. Device Modeling Report
COMPONENTS : CMOS DIGITAL INTEGRATED CIRCUIT
PART NUMBER : TC74ACT245FW
MANUFACTURER : TOSHIBA
Bee Technologies Inc.
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
2. Truth Table
Circuit simulation result
U1:GBAR 0
U1:DIR 0
U1:B1 1
U1:B2 1
U1:B3 1
U1:B4 1
U1:B5 1
U1:B6 1
U1:B7 1
U1:B8 1
U1:A1 1
U1:A2 1
U1:A3 1
U1:A4 1
U1:A5 1
U1:A6 1
U1:A7 1
U1:A8 1
0s 0.5us 1.0us
Time
Evaluation circuit
U1
DIR VCC
LO
__
A1 G LO
A2 B1
IN_B
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
A7 B6
DSTM1 5
A8 B7 CLK
GND B8 ONTIME = .2uS
OFFTIME = .2uS
74ACT245
0
Comparison table Function : A BUS = OUTPUT, B BUS = INPUT
Input Output
%Error
G 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:GBAR 0
U1:DIR 1
U1:A1 1
U1:A2 1
U1:A3 1
U1:A4 1
U1:A5 1
U1:A6 1
U1:A7 1
U1:A8 1
U1:B1 1
U1:B2 1
U1:B3 1
U1:B4 1
U1:B5 1
U1:B6 1
U1:B7 1
U1:B8 1
0s 0.5us 1.0us
Time
Evaluation circuit
U1
HI
DIR VCC
__
A1 G
IN_A LO
A2 B1
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
CLK A7 B6
5
DSTM1 A8 B7
ONTIME = .2uS
OFFTIME = .2uS GND B8
74ACT245
0
Comparison table Function : A BUS = INPUT, B BUS = OUTPUT
Input Output
%Error
G 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:GBAR 1
U1:DIR 1
U1:A1 Z
U1:A2 Z
U1:A3 Z
U1:A4 Z
U1:A5 Z
U1:A6 Z
U1:A7 Z
U1:A8 Z
U1:B1 Z
U1:B2 Z
U1:B3 Z
U1:B4 Z
U1:B5 Z
U1:B6 Z
U1:B7 Z
U1:B8 Z
0s 0.5us 1.0us
Time
Evaluation circuit
U1
DSTM1
CLK DIR VCC
__
ONTIME = .2uS A1 G HI
OFFTIME = .2uS
A2 B1
A3 B2
A4 B3
A5 B4
R1 V1
A6 B5
1MEG
A7 B6
5
A8 B7
GND B8
74ACT245
0
Comparison table Function : A BUS and B BUS = HIGH IMPEDANCE
Input Output
%Error
G 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
Circuit simulation result
5.0V
(540.006u,2.0003)
Output
2.5V Input
(515.983u,799.166m)
0V
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
Time
Evaluation circuit
U2
DIR VCC
LO
__
A1 G
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
V1 = 0
R2 A6 B5 V2 = 5 V1 5
TD = 0.5m
1G A7 B6 TR = 0.1m
TF = 0.1m
A8 B7 PW = 1m
PER = 2m
GND B8
74ACT245
0
Comparison table
VCC = 5V Measurement Simulation %Error
VIH (V) 2 2 0
VIL (V) 0.8 0.799166 -0.104
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
6. High Level and Low Level Output Voltage
Circuit simulation result
5.0V
2.5V
Output
SEL>>
0V Input
V(OUT)
5.0V
2.5V
0V
0s 5ms 10ms
V(V1:+)
Time
Evaluation circuit
U1
DIR VCC
LO
__
A1 G
OUT LO
A2 B1
A3 B2
A4 B3 V2
A5 B4
V1 = 0
R1 A6 B5 V2 = 4.5 V1 4.5
TD = 0.5m
0.09MEG A7 B6 TR = 3n
TF = 3n
A8 B7 PW = 1m
PER = 2m
GND B8
74ACT245
0
Comparison table
VCC = 4.5V Measurement Simulation %Error
VOH (V) 4.5 4.4987 -0.029
VOL (V) 0 0 0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005