SP3485EN-L

Part: SP3485 — MaxLinear

Type: Half-Duplex RS-485/RS-422 Transceiver

Description: A 3.3V low power half-duplex transceiver that meets RS-485 and RS-422 serial protocols, supporting data rates up to 10Mbps and interoperable with 5.0V logic.

Operating Conditions:

• Supply voltage: 3.3V ±5%
• Operating temperature: -40°C to 85°C
• Max data rate: 10 Mbps

Absolute Maximum Ratings:

• Max supply voltage: 6.0V
• Max junction temperature: 125°C
• Storage temperature: -65°C to 150°C

Key Specs:

• Differential output voltage (RS-485, R = 27Ω): 1.5 V (min)
• Driver short circuit current: ±250 mA (-7V ≤ V O ≤ +12V)
• Driver input to output propagation delay (t PLH/PHL): 17 ns (typ), 60 ns (max)
• Receiver differential input threshold: -0.2 V (min) to 0.2 V (max)
• Receiver input hysteresis: 20 mV (typ)
• Receiver input resistance: 12 kΩ (min)
• Receiver common-mode input voltage range: -7V to +12V
• Supply current, no load (driver enabled): 425 μA (typ), 2000 μA (max)

Features:

• RS-485 and RS-422 transceiver
• Operates from a single 3.3V supply
• Interoperable with 5.0V logic
• Driver/receiver enable
• -7V to +12V common-mode input voltage range
• Allows up to 32 transceivers on the serial bus
• Compatibility with industry standard 75176 pinout
• Driver output short-circuit protection

Package:

• 8-pin SOIC

• ■■ RS-485 and RS-422 transceiver
• ■■ Operates from a single 3.3V supply
• ■■ Interoperable with 5.0V logic
• ■■ Driver/receiver enable
• ■■ -7V to +12V common-mode input voltage range
• ■■ Allows up to 32 transceivers on the serial bus
• ■■ Compatibility with industry standard 75176 pinout
• ■■ Driver output short-circuit protection

Ordering Information - Back Page

SP3485EN-L Pinout

Package: DIP-8

Notes

• SP3485EN-L is an 8-pin DIP RS-485 transceiver
• Pin numbers confirmed from pinout diagram (top view)
• RE (pin 2) and DE (pin 3) are logic control inputs for receiver and driver enable respectively
• A (pin 6) and B (pin 7) are the differential bus lines for RS-485 communication

Unless otherwise noted: T AMB = T MIN to T MAX and V CC = 3.3V ±5%.

Storage Temperature ...................................-65˚C to 150˚C

Maximum Junction Temperature, T J ..........................125˚C

Power Dissipation .................................................... 600mW

(derate 6.90mW/°C above 70°C)

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.