사양
| 속성 | 가치 |
| Supplier | Texas Instruments,Rochester Electronics, LLC |
| Package / Case | Tape & Reel (TR),Cut Tape (CT),Bulk |
| Part Status | Active |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Receiver Hysteresis | 50 mV |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
개요
Description
SN75ALS1178NSR is a Texas Instruments differential bus transceiver in the SN75ALS family, used to connect a microcontroller or DSP to RS-485/RS-422 networks. It provides differential driver/receiver capabilities to support multi-point serial communication, with 3-state (enable) outputs for bus sharing. Key features typically include a fail-safe receiver (output goes high when the input is open/shorted or idle), robust ESD and thermal/industrial robustness, and a wide common-mode range for reliable long‑distance signaling. The device operates from a low-voltage supply (3.3V/5V variants are common) and is suitable for industrial automation, building control, and sensor networks. For exact pinout, voltage, data rate, and packaging (NSR) details, consult the SN75ALS1178NSR datasheet on TI’s website.
Equivalent
SN75ALS1178NSR is TI’s 8-bit bus transceiver with 3-state outputs (ALS family). For exact cross‑refs I need your target specs (Vcc, package) and whether you want TI-only or any vendor. Functionally similar parts are other 8‑bit bus transceivers/buffers with enable/dir control in similar voltage ranges. Share your supply voltage, packaging, and speed, and I’ll list precise equivalents.
Features
Here are the key features of TI SN75ALS1178NSR:
- 8-bit bidirectional bus transceiver with 3-state outputs
- Direction control (DIR) and output enable (OE) for flexible bus sharing
- 5V logic family operation (typical 4.5V–5.5V supply)
- TTL/CMOS-compatible inputs; bus-hold on data inputs
- High-speed CMOS (ALS) with fast propagation delays
- Low power consumption suitable for mixed-voltage systems
- Robust input/output protection (ESD protection on I/O)
- Temperature range suitable for industrial use (-40°C to 85°C)
- Small-outline, RoHS-compliant NSR package option
Applications: connecting noisy or slow hosts to faster peripherals, backplane/bus interfacing, and any 8-bit bidirectional data path requiring high-impedance state when not driven.
- 8-bit bidirectional bus transceiver with 3-state outputs
- Direction control (DIR) and output enable (OE) for flexible bus sharing
- 5V logic family operation (typical 4.5V–5.5V supply)
- TTL/CMOS-compatible inputs; bus-hold on data inputs
- High-speed CMOS (ALS) with fast propagation delays
- Low power consumption suitable for mixed-voltage systems
- Robust input/output protection (ESD protection on I/O)
- Temperature range suitable for industrial use (-40°C to 85°C)
- Small-outline, RoHS-compliant NSR package option
Applications: connecting noisy or slow hosts to faster peripherals, backplane/bus interfacing, and any 8-bit bidirectional data path requiring high-impedance state when not driven.
Pinout
- Pin count: 8 pins (SOIC-8 narrow package, NSR)
- Function: Single-channel differential line transceiver (RS-485/RS-422 compatible) with both driver and receiver. Pins: DI (data in), RO (data out), DE (driver enable), RE (receiver enable), A and B (differential bus), VCC, and GND.
- Function: Single-channel differential line transceiver (RS-485/RS-422 compatible) with both driver and receiver. Pins: DI (data in), RO (data out), DE (driver enable), RE (receiver enable), A and B (differential bus), VCC, and GND.
Manufacturer
- Manufacturer: Texas Instruments (TI)
- Type of company: A multinational American technology company that designs, manufactures, and sells semiconductor and embedded processing products (analog, digital, and mixed-signal ICs).
- Type of company: A multinational American technology company that designs, manufactures, and sells semiconductor and embedded processing products (analog, digital, and mixed-signal ICs).
Application
SN75ALS1178NSR is an 8-bit, bidirectional bus transceiver with 3-state outputs for buffering and routing a parallel data bus. Typical applications:
- Backplane/inter-board data paths in embedded and industrial equipment
- Interfacing 5V and 3.3V logic on an 8-bit bus
- Bus buffering and isolation for memory-mapped I/O and peripherals
- Data transfer paths in consumer electronics, printers, and networking gear
- General-purpose bidirectional data-path buffering for parallel interfaces in embedded systems
- Backplane/inter-board data paths in embedded and industrial equipment
- Interfacing 5V and 3.3V logic on an 8-bit bus
- Bus buffering and isolation for memory-mapped I/O and peripherals
- Data transfer paths in consumer electronics, printers, and networking gear
- General-purpose bidirectional data-path buffering for parallel interfaces in embedded systems
Package
8-pin Small-Outline package: SOIC (narrow body), RoHS-compliant.
