MAX485
Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceiver
Manufacturer
adi
Overview
Part: MAX485
Type: Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceiver
Key Specs:
- Quiescent Current: 300µA
- Supply Voltage: 4.75V to 5.25V
- Data Rate: 2.5 Mbps
- Common-Mode Input Voltage Range: -7V to +12V
- Propagation Delay: 30ns
- Skew: 5ns
- Max Transceivers on Bus: 32
Features:
- Low Quiescent Current: 300µA
- -7V to +12V Common-Mode Input Voltage Range
- Three-State Outputs
- 30ns Propagation Delays, 5ns Skew
- Operate from a Single 5V Supply
- Allows up to 32 Transceivers on the Bus
- Data rate: 2.5 Mbps
- Current-Limiting and Thermal Shutdown for Driver Overload Protection
- Transmitter outputs and receiver inputs protected to ±15kV Air ESD
- Fail-safe receiver input
- Designed for half-duplex applications
Applications:
- Low-Power RS-485 Transceivers
- Low-Power RS-422 Transceivers
- Level Translators
- Transceivers for EMI-Sensitive Applications
- Industrial-Control Local Area Networks
Package:
- SOP8L
- DIP8L
Features
- Low Quiescent Current: 300µA
- -7V to +12V Common-Mode Input Voltage Range
- Three-State Outputs
- 30ns Propagation Delays, 5ns Skew
- Operate from a Single 5V Supply
- Allows up to 32 Transceivers on the Bus
- Data rate: 2.5 Mbps
- Current-Limiting and Thermal Shutdown for Driver Overload Protection
- The transmitter outputs and receiver inputs are protected to ±15kV Air ESD
Pin Configuration
(Top View) D OR P PACKAGE
Electrical Characteristics
$(V_{CC} = 5V \pm 5%, T_A = T_{MIN} \text{ to } T_{MAX}, \text{ unless otherwise noted.})$ (Notes 1, 2)
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Differential Driver Output (no load) | V OD1 | 5 | V | |||
| Differential Driver Output | $R = 50\Omega (RS-422)$ | 2 | ||||
| (with load) | V OD2 | R = $27\Omega$ (RS-485), Figure 3 | 1.5 | 5 | V | |
| Change in Magnitude of Driver Differential Output Voltage for Complementary Output States | ΔVod | R = $27\Omega$ or $50\Omega$ , Figure 3 | 0.2 | V | ||
| Driver Common-Mode Output Voltage | Voc | R = $27\Omega$ or $50\Omega$ , Figure 3 | 3 | V | ||
| Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States | ΔVod | R = $27\Omega$ or $50\Omega$ , Figure 3 | 0.2 | V | ||
| Input High Voltage | VIH | DE,DI, RE | 2.0 | |||
| Input Low Voltage | VIL | DE,DI, RE | 0.8 | V | ||
| Input Current | lini | DE,DI, RE | ±2 | μA |
Absolute Maximum Ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply Voltage | Vcc | 12V | V |
| Control Input Voltage | Vciv | -0.5 to (Vcc+0.5) | V |
| Driver Input Voltage | DI | -0.5 to (Vcc+0.5) | V |
| Driver Output Voltage (A, B) | DO | -8 to +12.5 | V |
| ReceiverInputVoltage(A, B) | VRIV | -8 to +12.5 | V |
| Receiver Output Voltage | RO | -0.5 to (Vcc+0.5) | V |
| 8-Pin Plastic DIP Continuous Power Dissipation (derating 9.09mW/°C above +70°C) | P DIP | 727 | mW |
| 8-Pin SOP Continuous Power Dissipation (derating 5.88mW/°C above +70°C) | Psop | 471 | mW |
| Operating Temperature Range | Ta | 0 to +70 | °C |
| Storage Temperature Range | Tѕтc | -65 to +160 | °C |
| Lead Temperature, 10 sec | TL | +300 | °C |
Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.
Get structured datasheet data via API
Get started free