SP330 Advanced Multiprotocol Transceiver

Exar offers the SP330 featuring a low-voltage logic interface

Image of Exar Corporation's SP330 Advanced Multiprotocol TransceiverExar's SP330 is an advanced multiprotocol transceiver supporting RS-232, RS-485, and RS-422 serial standards and featuring a variable low voltage logic interface, down to 1.65 V. Full operation requires only four external charge pump capacitors. The RS-485/RS-232 mode pin selects RS-485 mode when high, and RS-232 mode when low. In RS-485 mode the HALF/FULL pin configures the transceiver as either half or full duplex. The high speed drivers operate up to 20 Mbps in RS-485/422 modes, and up to 1 Mbps in RS-232 mode. All drivers can be slew limited to 250 kbps in any mode to minimize electromagnetic interference (EMI) by setting the dedicated SLEW pin low. All transmitter outputs and receiver inputs feature robust electrostatic discharge (ESD) protection to ±15 kV IEC 61000-4-2 Airgap, ±15 kV Human Body Model (HBM) and ±8 kV IEC 61000-4-2 Contact. Each receiver output has full fail-safe protection to avoid system lockup, oscillation, or indeterminate states by defaulting to logic-high output level when the inputs are open, shorted, or terminated but undriven. No external biasing resistors are required. The SP330 operates from a single power supply, either 3.3 V or 5 V, with low idle current. The shutdown mode consumes less than 1 µA in low-power standby operation with RS-232 receivers enabled.

Features and Benefits Applications
  • Robust ESD Protection:
    • ±15 kV IEC 61000-4-2 air-gap discharge
    • ±8 kV IEC 61000-4-2 contact discharge
    • ±15 kV Human Body Model (HBM)
    • 20 Mbps RS-485 and 1 Mbps RS-232 data rates
    • Pin-selectable 250 kbps slew limiting
    • Single-supply operation from +3 V to +5.5 V
    • 1.65 V to 5.5 V logic interface VL pin
    • 2 drivers, 2 receivers RS-232/V.28
    • 1 driver, 1 receiver RS-485/422
    • Full-or-half duplex configuration
    • 1/8th unit load, up to 256 receivers on bus
    • RS-485/422 enhanced receiver fail-safe for open, shorted, or terminated but idle inputs
    • 10 nA shutdown supply current (typical)
    • Small 24 TSSOP package
  • Software programmable serial ports (RS-232, RS-422, RS-485)
  • Industrial and single-board computers
  • Industrial and process control equipment
  • Point-Of-Sale equipment
  • HVAC controls and networking equipment
  • Building security and automation


ImageManufacturer Part NumberDescriptionPart StatusTypeProtocolAvailable Quantity
SP330EEY-L datasheet linkIC TXRX RS232/485 24TSSOPSP330EEY-LIC TXRX RS232/485 24TSSOPActiveTransceiverRS232, RS422, RS4852995 - Immediate
SP330EEY-L product page link
SP330EEY-0A-EB datasheet linkEVAL BOARD TXRX RS232/485SP330EEY-0A-EBEVAL BOARD TXRX RS232/485Interface, Transceiver, RS-232, RS-422, RS-485-SP330E7 - Immediate
SP330EEY-0A-EB product page link
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Published: 2014-01-30