| Number of receivers | 0 |
| Number of transmitters | 4 |
| Supply voltage (Nom) (V) | 5 |
| Signaling rate (Max) (Mbps) | 20 |
| IEC 61000-4-2 contact (+/- kV) | None |
| Fault protection (V) | -10 to 15 |
| Common mode range | -7 to 12 |
| Number of nodes | 32 |
| Isolated | No |
| ICC (Max) (mA) | 55 |
| Rating | Catalog |
| Operating temperature range (C) | 0 to 70 |
- Meets or Exceeds ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11
- High-Speed Advanced Low-Power Schottky Circuitry
- Designed for 20-MBaud Operation in Both Serial and Parallel Applications
- Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments
- Low Supply-Current Requirements: 55mAMax
- Wide Positive and Negative Input/Output Bus-Voltage Ranges
- Driver Output Capacity...±60 mA
- Thermal Shutdown Protection
- Driver Positive and Negative Current Limiting
- Logically Interchangeable With SN75172
The SN75ALS172A comprises four line drivers with 3-state differential outputs. They are designed to meet the requirements of ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11. This device is optimized for balanced multipoint bus transmission at rates of up to 20 Mbaud. Each driver features wide positive and negative common-mode output voltage ranges, making it suitable for party-line applications in noisy environments.
The SN75ALS172A provides positive- and negative-current limiting and thermal shutdown for protection from line-fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of approximately 150°C.
The SN75ALS172A is characterized for operation from 0°C to 70°C.
H = high level, L = low level, X = irrelevant, Z = high impedance (off)
