1.8V to 5.5V RS-232 Single and Dual Transceivers

The LTC2801/LTC2802/LTC2803/LTC2804 are single and dual RS-232 transceivers in narrow SSOP and chip-scale DFN packages. All operate over a supply range of 1.8V to 5.5V, which permits operation directly from two alkaline, NiCd or NiMH cells. An integrated DC-to-DC converter generates power supplies for driving RS-232 levels. A logic supply pin allows easy interfacing with different logic levels independent of the DC-DC supply.

These parts are compatible with the TIA/EIA-232-F standard. Driver outputs are protected from overload and can be shorted to ground or up to ±15V without damage. To extend battery life, receivers can be kept active, operating at reduced speed, with only 15μA current. In shutdown mode, current is further reduced to 1μA.

Part Number

Driver & Receivers

Max Data Rate

Modes

Package

LTC2801

1 + 1

0.25Mbps

SD, RA, DD, AO

DFN-12

LTC2802

1 + 1

1Mbps

SD, RA, DD, AO

DFN - 12

LTC2803

2 + 2

0.25Mbps

SD, RA, DD, AO

DFN-16

LTC2803-1

2 + 2

0.25Mbps

SD, AO

SSOP-16

LTC2804

2 + 2

1Mbps

SD, RA, DD, AO

DFN-16

LTC2804-1

2 + 2

1Mbps

SD, AO

SSOP-16

Applications

* Battery-Powered Systems

* Computers and Consumer Electronics

* Diagnostic Ports

* 1.8V to 5.5V Supply Voltage

* Single and Dual Transceivers

* High-Speed Operation

* 1Mbps for 250pF/3kΩ Load (LTC2802, LTC2804)

* 250kbps for 1nF/3kΩ Load

* 100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load

* Low-Power 1μA Shutdown and 15μA Receivers-Active Modes

* No Damage or Latchup to ±10kV ESD on RS-232 Interface