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PDF HD293486 Data sheet ( Hoja de datos )
| Número de pieza | HD293486 | |
| Descripción | Quadruple Dfferential Line Receivers With 3 State Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HD293486 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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HD293486
Quadruple Dfferential Line Receivers With 3 State Outputs
The HD293486 features quadruple Differential
line receivers designed to meet the specs of EIA
RS–422A and RS–423A. This device operates
from a single 5 V power supply. When the
enable input is low the associated outputs are in a
high impedance state.
Logic Diagram
1A
1B
1,2 Output
Enable
2A
2B
3A
3B
3,4 Output
Enable
4A
4B
1Y
2Y
3Y
4Y
Pin Arrangement
1B
1A
1Y
1,2 Output
Enable
2Y
2A
2B
GND
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
(Top View)
Vcc
4B
4A
4Y
3,4 Output
Enable
3Y
3A
3B
Function Table
Differential Input
A–B
VID ≥ 0.2 V
–0.2 V < VID < 0.2 V
VID ≤ –0.2 V
X
Output Enable
H
H
H
L
Output
Y
H
?
L
Z
H : High level
L : Low level
X : Irrelevant
? : Indeterminate
Z : High Impedance
1 page  
HD293486
2. tHZ, tZH, tLZ, tZL
Test circuit
–1.5 V
1.5 V
SW 1
HD293486
Output
2 KΩ SW2
5V
Pulse
Generator
Input
CL =
15 pF
5 KΩ
SW3
Notes: 1. The pulse generator has following characteristics:
PRR = 1 MHZ, 50 % duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, Zout = 50 Ω
2. CL includes probe and jig capacitance.
3. All diodes are 1S2074 H
Waveforms
(1) tHZ
Input
1.5 V
Output
tHZ
0.5 V
3V
SW1 to 1.5 V
0 V SW2 CLOSE
VOH SW3 CLOSE
≈1.3 V
(2) tZH
Input
Output
1.5 V
tHZ
1.5 V
3V
0V
VOH
≈1.3 V
SW1 to 1.5 V
SW2 OPEN
SW3 CLOSE
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HD293486.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD293486 | Quadruple Dfferential Line Receivers With 3 State Outputs | Hitachi Semiconductor |
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