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| Part Number | DS8921AM | DS8921AMX | DS8921M | DS8921AN | DS8923AM | DS8921ATM | DS8922AM |
|---|---|---|---|---|---|---|---|
| Manufacturer | National Semiconductor | National Semiconductor | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Obsolete | Obsolete | Obsolete | Obsolete |
| Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Protocol | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422 | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 | 1/1 | 1/1 | 1/1 | 2/2 | 1/1 | 2/2 |
| Duplex | Full | Full | Full | Full | Full | Full | Full |
| Receiver Hysteresis | 70 mV | 70 mV | 70 mV | 70 mV | 70 mV | 70 mV | 70 mV |
| Data Rate | - | - | - | - | - | - | - |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-DIP (0.300", 7.62mm) | 16-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-MDIP | 16-SOIC | 8-SOIC | 16-SOIC |
