SPICE MODEL of TORX179 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: Fiber Optic Transmitting Module (TOSLINK)
PART NUMBER: TORX179
MANUFACTURER: TOSHIBA
Bee Technologies Inc.
All Rights Reserved Copyright (C) Bee Technologies Inc. 2005

2. PSpice Model Equivalent circuit
VCC
GPD
D2
Input IN+ OUT+
IN- OUT-
dio R9
1 Q4
GVALUE QGAIN
0 10k
0.01*V(%IN+, %IN-) RP
R11
227
10k R3 R10
EC
GOUT 2
IN+ OUT+ Output
IN- OUT- 100 40
EVALUE
R8 C4
IF ( V(%IN+, %IN-)>2.0, ( V(VCC)-0.6 ), 0.2 )
820 100p
VREF = 2V
0
Application circuit
U2
Output
Output
Input
GND
INPUT
Vcc
TORX179
C5
0.1u V2
5V dc
22.03mA
Current Consumption
Icc = 22.03mA
All Rights Reserved Copyright (C) Bee Technologies Inc. 2005

3. Output Voltage Characteristics ( VOH ,VOL )
Circuit simulation result
VOH = 4.4V
VOL = 0.2V
Evaluation circuit
U1
INPUT
Input
V1 = 0 V3
Output
V2 = 5
Vcc
TD = 0
TR = 20u
GND
TF = 20u R8
PW = 10u
PER = 100u V1 10MEG
5Vdc C1 TOTX179
0
0.1u
U2
Output
Output
Input
GND
R7
10MEG
Vcc
TORX179
C5
0.1u V2
5Vdc
All Rights Reserved Copyright (C) Bee Technologies Inc. 2005

4. Pulse Width Distortion Characteristics
Circuit simulation result
TOTX179 Input Pulse Width
= 328.368ns
TORX179 Output Pulse Width
= 338.190ns
Pulse Width Distortion
= 9.822ns
Evaluation circuit
DVD Player Signal
U2
R5 U1
Input
Output
INPUT
Output
100
Output
0A
Input
V3
Vcc
GND
V1 = 0.668
V2 = 3.4 C3
TD = 200n
110p
GND
TR = 10n
Vcc
TF = 10n R8
PW = 318n V1
PER = 656n 5Vdc C1 TOTX179 10MEG TORX179
C5
0 0 0.1u 0.1u V2
14.91mA 5Vdc
Simulation Result
Simulation condition: Pulse width = 328.368, Pulse cycle = 356n No load,
Measurement Simulation Error(%)
∆tw 10 ns 9.822 ns - 1.78
All Rights Reserved Copyright (C) Bee Technologies Inc. 2005

5. Pulse Width Distortion Characteristics Reference
Measurement data at no load
TOTX179 Input Pulse Width
= 328ns
TORX179 Output Pulse Width
= 338ns
Pulse Width Distortion
= 10ns
Note: Optical cable length 1m.
All Rights Reserved Copyright (C) Bee Technologies Inc. 2005