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PDF HD26LS32 Data sheet ( Hoja de datos )
| Número de pieza | HD26LS32 | |
| Descripción | Quadruple Differential Line Receivers | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD26LS32
Quadruple Differential Line Receivers With 3 State Outputs
ADE-205-577 (Z)
1st. Edition
Dec. 2000
Description
The HD26LS32 features quadruple line receivers designed to meet the specs of EIA standard RS-422A and
RS-423. This device operates from a single 5 V power supply. The enable function is common to all four
receivers and offers a choice of active high or active low input. Fail safe design ensures that if the inputs
are open, the outputs will always be high.
Logic Diagram
1A
1B
2A
2B
3A
3B
4A
4B
Enable G
Enable G
1Y
2Y
3Y
4Y
1 page  
1. tPLH, tPHL
Test circuit
Input
Pulse
Generator
*1
HD26LS32
Output
VCC
2 kΩ
CL 5 k Ω *3
*2
Waveforms
Input A
Input B
Output
2V
0V 0V
0V 0V
tPLH
1.3 V
tPHL
1.3 V
2.5 V
–2.5 V
2.5 V
–2.5 V
VOH
VOL
5
5 Page 
HD26LS32
Undetermined
RT RT
"H"
Figure 5 Examples of Transmission Line Disconnection
Driver
VCC
R1 R2
Receiver
RT
R1 R2
Figure 6 Method of Enhancing Fail-Safe Function
0.6
0.5
0.4
0.3
0.2
0.1
0
100 kΩ
300 kΩ
R2 = ∞
VCC = 5 V
Ta = 25°C
100 Ω
VCC
R1 R2
VID
R1 R2
5 10
R1 (kΩ)
15
Figure 7 R1, R2 vs. Differential Input Voltage
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HD26LS32.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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