Description

        The AT3040–AT3045 is a family of 5V quad RS-485/RS-422 transmitters designed for digital data trans-mission over twisted-pair balanced lines. All transmitter outputs are protected to ±10kV using the Human Body Model. In addition the AT3040–AT3045 withstand ±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst Stressing. The AT3040/AT3043 (250kbps) and the AT3041/AT3044 (2.5Mbps) are slew-rate limited transmitters that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free transmission.

          The AT3040–AT3045 feature a hot-swap capability that eliminates false transitions on the data cable during power-up or hot insertion. The AT3042B/AT3045B are optimized for data transfer rates up to 20Mbps, the AT3041/AT3044 for data rates up to 2.5Mbps, and the AT3040/AT3043 for data rates up to 250kbps. The AT3040–AT3045 offer optimum performance when used with the AT3093E or AT3095 5V quad differential line receivers or AT3094E/AT3096 3V quad differential line receivers.

        The AT3040–AT3045 are ESD-protected pin-compat-ible, low-power upgrades to the industry-standard ‘SN75174 and ‘DS26LS31C. They are available in space-saving TSSOP, narrow SO, and wide SO packages.

Features

ESD Protection: ±10kV—Human Body Model

Single +5V Operation

Guaranteed Device-to-Device Skew (AT3040/AT3041/AT3043/AT3044)

Pin-Compatible with ‘SN75174, ‘26LS31C and LTC487

Hot-Swappable for Telecom Applications

Up to 20Mbps Data Rate (AT3042B/AT3045B)

Slew-Rate Limited (Data Rates at 2.5Mbps and 250kbps)

2nA Low-Power Shutdown Mode

1mA Operating Supply Current

±4kV EFT Fast Transient Burst Immunity per IEC 1000-4-4

Level 2 Surge Immunity per IEC 1000-4-5, Unshielded Cable Model

Ultra-Small 16-Pin TSSOP, 16-Pin Narrow SO, and Wide 16-Pin SO

Applications

Telecommunications Equipment

Industrial Motor Control

Transmitter for ESD-Sensitive Applications

Hand-Held Equipment

Industrial PLCs

Pin Configurations