Analog Design Challenge — A
    chance to win $60,000
Supply Voltage Supervisor and
    watchdog timer
Three high-quality stereo audio
    codecs
Low-voltage differential
    signaling (LVDS) family
    of devices plus EVM offer
High-speed xDSL line
    driver/receiver offers ultra-low
    distortion
Family of rail-to-rail I/O ap amps
    drive ± 90-mA loads
Low-voltage single-supply
    family of op amps offers
    exceptional ac performance
Audio power amplifiers with
    75-mW stereo output drive
Universal op amp EVM offered
    with and without devices
    attached
The industry's fastest 12-bit
    Vout DACs available
New RF modulator/synthesizer
    simplifies the design of IS-136
    wireless handsets
Ultra low power MCU - 0.1 µA
    sleep mode
High-speed low-cost RS-232
    interface devices ideal for
    PC desktop applications
ESD protection at ± 15-kV in
    data line transceivers
New Data Transmission Line
    Circuits Data Book

Product Features

• Low-cost RS-232 interface solution
• High-speed (256K bps) data signaling rate
• Industry best ± 15 kV HBM ESD protection pin-to pin (serial port pins, including GND)
• Low power consumption 5-V, ± 12-V supplies
• Temperature range of 0°C to 70°C

Two high-speed, fully TIA/EIA-232-F data transmission standard compliant interface devices are now available. The SN75LP185A and the SN75LPE185 are low-power, single-chip PC host interface devices designed to operate at data rates up to 256 K bits per second (bps). Both contain electromagnetic interference (EMI) reduction circuitry and driver outputs that clamp to approximately 6 V, reducing overall system noise. The SN75LPE185 provides the same functionality as the SN75LP185A with addition of option for high-impedance driver and receiver outputs and a wake-up mode. Both devices are excellent interfaces between desktop PCs and peripherals and they compliment TI's extensive line of data transmission products for the RS-422, RS-485, Fibre Channel, low-voltage differential signaling (LVDS), universal serial bus (USB), IEEE 1394 and other standards.

End Equipment Applications

Applications for the SN75LP185A and the SN75LPE185 include PC and Desktop Applications such as:

Both the SN75LP185A and the SN75LPE185 are optimized for IBM™ PC compatible serial ports. These devices transmit and receive 4 µs pulses, equivalent to 256 kbps and have a maximum slew rate of 30 V/µs. Figure 1 shows how the 'LP185A driver output, with an input voltage of 0 to 5 V, performs at room temperature with 5 k and 500 pF load (equivalent to about three meters of cable). Note, the maximum 'LP185A frequency achieved meets RS-232 input threshold sensitivity of ± 3 V.

Availability, Packaging and Pricing:

The SN75LP185A is available in a 20-pin small-outline integrated circuit (SOIC) and planned for a 20-pin shrink small-outline package (SSOP) and in a 20-pin thin shrink small-outline package (TSSOP). The SN75LPE185 is available in a 24-pin SSOP, a 24-pin TSSOP and a 24-pin SOIC.

More information regarding TI's interface products is available on the World Wide Web at http://www-s.ti.com/sc/docs/psheets/pids2.htm.

• SN75LP185A
• SN75LPE185