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This literature is subject to all applicable copyright laws and is not for resale in any manner.74LCXP16245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and Pull-Down Resistors August 1998 Revised June 2005 74LCXP16245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and Pull-Down Resistors General Description Features The LCXP16245 contains sixteen non-inverting bidirec- 5V tolerant inputs and outputs tional buffers with 3-STATE outputs and is intended for bus 2.3V3.6V V specifications provided CC oriented applications. The device is designed for low volt- I/O pull-down resistors terminate inactive busses ensur- age (2.5V or 3.3V) V applications with capability of inter- CC ing a stable bus state facing to a 5V signal environment. The device is byte 5.5 ns t max (V 3.3V), 20 PA I max PD CC CC controlled. Each byte has separate control inputs which could be shorted together for full 16-bit operation. The T/R Power down high impedance inputs and outputs inputs determine the direction of data flow through the Supports live insertion/withdrawal (Note 1) device. The OE inputs disable both the A and B ports by r24 mA output drive (V 3.0V) CC placing them in a high impedance state. Implements proprietary noise/EMI reduction circuitry In addition, A and B port datapath pins have built-in resis- tors to GND allowing the pins to float without any increase Pinout compatible with 74 series 16245 in I current. This feature is intended to address modular CC Latch-up performance exceeds 500 mA and space constrained applications where additional space ESD performance: consumed by external resistors is not available. Human body model 2000V The LCXP16245 is fabricated with an advanced CMOS Machine model 200V technology to achieve high speed operation while maintain- Note 1: To ensure the high-impedance state during power up or down OE ing CMOS low power dissipation. should be tied to V through a pull-up resistor: the minimum value or the CC resistor is determined by the current-sourcing capability of the driver. Ordering Code: Order Number Package Number Package Description 74LCXP16245MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide 74LCXP16245MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter X to the ordering code. Logic Symbol Pin Descriptions Pin Names Description OE Output Enable Input n T/R Transmit/Receive Input n A A Side A Inputs or 3-STATE Outputs 0 15 B B Side B Inputs or 3-STATE Outputs 0 15 2005 Fairchild Semiconductor Corporation DS500053 www.fairchildsemi.com