|Category||Communication => Transeivers|
|Description||Dual Differential Line Receiver|
|Company||National Semiconductor Corporation|
|Datasheet||Download DS9639A datasheet
The is a Schottky dual differential line receiver which has been specifically designed to satisfy the requirements of EIA Standards RS-422, RS-423 and RS-232C. In addition, the DS9639A satisfies the requirements of MIL-STD 188-114 and is compatible with the International Standard CCITT recommendations. The DS9639A is suitable for use as a line receiver in digital data systems, using either single ended or differential, unipolar or bipolar transmission. It requires a single 5.0V power supply and has Schottky TTL compatible outputs. The DS9639A has an operational input common mode range ± 7.0V either differentially or to ground.Features
Dual channel Single 5.0V supply Satisfies EIA Standards RS-422, RS-423 and RS-232C Built-in 35 mV hysteresis High input common mode voltage range High input impedance TTL compatible outputs Schottky technology
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Temperature Range Lead Temperature Molded DIP (soldering, 10 sec.) VCC Lead Potential to Ground Input Potential to Ground Lead Differential Input Voltage Output Differential to Ground Lead to 5.5VOutput Sink Current Maximum Power Dissipation (Note at 25°C Molded Package
Supply Voltage (VCC) Operating Temperature (TA) Min 4.75 0 Typ 5.0 25 Max 5.25 70 Units V °C
Over recommended operating temperature and supply voltage ranges, unless otherwise specified Symbol VTH VTH(R) II VOL VOH IOS ICC VHYST Parameter Differential Input Threshold Voltage (Note 6) Differential Input Threshold Voltage (Note 7) Input Current (Note 8) Output Voltage LOW Output Voltage HIGH Output Short Circuit Current (Note 5) Supply Current Input Hysteresis 10V, 0V VCC -10V, 0V VCC 5.5V IOL = 20 mA, VCC = Min IOH = -1.0 mA, VCC = Min = 0V, VCC = Max VCC = Max, VI+ = 0.5V, VI- = GND VCM ± 7.0V (See Curves) mA -7.0V VCM +0.4 V Conditions (Note 2) -7.0V VCM +7.0V Min -0.2 Typ Max +0.2 Units V
VCC = 25°C Symbol tPLH tPHL Parameter Propagation Delay Time Low to High Propagation Delay Time High to Low
Note 2: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The tables of "Electrical Characteristics" provide conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the to +70°C range for the DS9639A. All typicals are given for VCC = 5V and = 25°C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 5: Only one output at a time should be shorted. Note 6: VDIFF (Differential Input Voltage) = (VI+) - (VI-). VCM (Common Mode Input Voltage) = VI+ or VI-. Note in series with inputs. Note 8: The input not under test is tied to ground.
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