Dual Differential Line Drivers
HD29412
Dual Differential Line Drivers With 3 State Outputs The HD29412 features dual differential line drivers with thr...
Description
HD29412
Dual Differential Line Drivers With 3 State Outputs The HD29412 features dual differential line drivers with three state outputs designed to satisfy the requirements of EIA–422. Each driver has an output control is low, the associated outputs are in a high impedance state. This permits many deviced to be connected together on the same transmission line for party line applications.
Pin Arrangement
NC 1Z 1Y 1A
1 2 3 4 5 6 7 (Top View)
14 13 12 11
VCC 2Z 2Y 2B
Function Table
1B Input A H H L L X X
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Output C H H H H L X D H H H H X L Y H L L L Z Z Z L H H H Z Z 1C GND
10 2A 9 8 2C D
B H L H L X X : : : :
H L X Z
High level Low level Irrelevant High impedance
HD29412
Absolute Maximum Ratings
Item Supply Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VCC *1 VIN PT Topr Tstg Ratings 7 5.5 1150 0 to + 70 –65 to + 150
HD29412
Unit V V mW °C °C
Notes: 1. The values is defined as of ground terminal. 2. The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
Recommended Operating Conditions
Item Supply Voltage Output Current Symbol VCC IOH IOL Operating Temperature Topr 0 Min 4.75 Typ 5.00 Max 5.25 –40 40 70 Unit V mA mA °C
Electrical Characteristics (Ta = 0 to +70°C)
Item Input Voltage Symbol Conditions VIH VIL Input Clamp Voltage Output Voltage VIK VOH VCC = 4.75 V, II = –12 mA VCC = 4.75 V, VIL = 0.8 V VIH = 2 ...
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