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HD26LS32 Datasheet(PDF) 9 Page - Hitachi Semiconductor

Part No. HD26LS32
Description  Quadruple Differential Line Receivers With 3 State Outputs
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Manufacturer  HITACHI [Hitachi Semiconductor]
Direct Link  http://www.renesas.com/eng
Logo HITACHI - Hitachi Semiconductor

HD26LS32 Datasheet(HTML) 9 Page - Hitachi Semiconductor

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HD26LS32
9
This circuit provides for the receiver input section to be pulled up or down by a high resistance that
prevents it from becoming a driver load so that the output goes high in the event of a transmission line
breakage or connector detachment.
When the input pin is placed in the open state by the pull-up/pull-down resistance, the differential input
voltage V
ID is as follows:
V
ID:
(V
IA – VIB) ≥ 0.2 V
and the output is fixed high.
However, if the receiver-side termination resistance remains connected despite a line breakage or connector
detachment, the output will be undetermined (figure 5).
1Y
2Y
3Y
4Y
1A
1B
2A
2B
3A
3B
4A
4B
Enable G
Enable G
Figure 1 HD26LS32 Block Diagram
5
4
3
2
1
0
–1
–2
–3
–4
–5
–25 –20 –15 –10 –5
0
5
10 15 20 25
Input Voltage Vin (V)
Ta = 25
°C
+3.25 mA
V CC
=
0
V
V CC
=
5.25
V
–3.25 mA
–10 V –3 V
+3 V +10 V
Figure 2 Input Voltage vs. Input Current Characteristics


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