SP3485

Part: SP232A/233A/310A/312A — Sipex

Type: Enhanced RS-232 Line Drivers/Receivers

Description: A family of line driver and receiver pairs operating from a single +5V supply, meeting RS-232F and ITU V.28 specifications with a 120Kbps data rate under load and low power CMOS design.

Operating Conditions:

• Supply voltage: +4.5V to +5.5V
• Operating temperature: 0°C to +85°C
• Charge pump capacitors: 0.1 μF to 1 μF
• Max data rate: 120 Kbps (under load)

Absolute Maximum Ratings:

• Max supply voltage (Vcc): +6V
• Max input voltage (RIN): ±30V
• Max output short circuit duration (TOUT): Continuous

Key Specs:

• TTL Logic Threshold LOW: 0.8 V (max)
• TTL Logic Threshold HIGH: 2.0 V (min)
• RS-232 Output Voltage Swing: ±5 V (min) (All transmitter outputs loaded with 3kΩ to Ground)
• Maximum Data Rate: 120 Kbps (min) (C L = 2500pF, R L = 3kΩ)
• RS-232 Input Voltage Range: -30 V to +30 V
• RS-232 Input Resistance: 3 kΩ (min) to 7 kΩ (max) (T A = +25°C, -15V ≤ V IN ≤ +15V)
• Driver Propagation Delay: 1.5 μs (typ), 3.0 μs (max) (TTL to RS-232; C L = 50pF)
• V CC Power Supply Current (SP232A): 3 mA (typ), 5 mA (max) (No load, T A = +25°C; V CC = 5V)
• Shutdown Supply Current (SP310A, SP312A): 1 μA (typ), 10 μA (max) (V CC = 5V, T A = +25°C)

Features:

• Operates from Single +5V Power Supply
• Meets All RS-232F and ITU V.28 Specifications
• Operates with 0.1 μF to 1 μF Capacitors
• High Data Rate - 120Kbps Under Load
• Low Power CMOS - 3mA Operation (SP232A)
• No External Capacitors Required (SP233A)
• Low Power Shutdown (SP310A, SP312A)
• Enhanced ESD Protection (2kV Human Body Model)

Package:

• 16-pin NSOIC
• 16-pin PDIP
• 16-pin WSOIC
• 18-pin WSOIC
• 20-pin PDIP
• 20-pin WSOIC

• ■ Operates from Single +5V Power Supply
• ■ Meets All RS-232F and ITU V.28 Specifications
• ■ Operates with 0.1 μ F to 1 μ F Capacitors
• ■ High Data Rate - 120Kbps Under Load
• ■ Low Power CMOS - 3mA Operation (SP232A)
• ■ No External Capacitors Required (SP233A)
• ■ Low Power Shutdown (SP310A,SP312A)
• ■ Enhanced ESD Protection (2kV Human Body Model)

Now Available in Lead Free Packaging

DESCRIPTION

The SP232A/233A/310A/312A devices are a family of line driver and receiver pairs that meet the specifications of RS-232 and V.28 serial protocols. These devices are pin-to-pin compatible with popular industry standards. As with the initial versions, the SP232A/233A/310A/312A devices feature at least 120Kbps data rate under load, 0.1 μ F charge pump capacitors, and overall ruggedness for commercial applications. This family also features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The series is available in plastic DIP and SOIC packages operating over the commercial and industrial temperature ranges.

SP3485 Pinout

Package: DIP-8

Notes

• SP3485 is an 8-pin RS-485 transceiver in DIP package
• RE (pin 2) and DE (pin 3) control receiver and driver enable functions respectively
• Pins A (6) and B (7) form the differential RS-485 bus interface
• Single +5V supply (pin 8); ground reference on pin 5

V CC =+5V ± 10%; 0.1 μ F charge pump capacitors; T MIN to T MAX unless otherwise noted.

• N.C. for SP310E_A, EN for SP312E_A

This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

V

cc

................................................................................................................................................................. +6V

V +

.................................................................................................................... (Vcc-0.3V) to +11.0V

V -

............................................................................................................................................................ -11.0V

Input Voltages

T

IN

......................................................................................................................... -0.3 to (Vcc +0.3V)

RIN

............................................................................................................................................................

±

30V