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| Part Number | DS9638CM | DS9638CN | DS9638CMX | DS9638CJ | 
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor | 
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | 
| Type | Driver | Driver | Driver | Transceiver | 
| Protocol | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422 | 
| Number of Drivers/Receivers | 2/0 | 2/0 | 2/0 | 2/0 | 
| Duplex | - | - | - | - | 
| Receiver Hysteresis | - | - | - | - | 
| Data Rate | - | - | - | - | 
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | - | 
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Through Hole | 
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-DIP (0.300", 7.62mm) | 8-SOIC (0.154", 3.90mm Width) | 8-CDIP (0.300", 7.62mm) | 
| Supplier Device Package | - | 8-MDIP | - | 8-CDIP |