74VCX32500

www.DataSheet4U.com 74VCX32500 Low Voltage 36-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs March 2001 Revised August 2003 74VCX32500 Low Voltage 36-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs General Description The VCX32500 is an 36-bit universal bus transceiver which combines D-type latches and D-type flip-flops to allow data flow in transparent, latched, and clocked modes. Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable (LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. For A-to-B data flow, the device operates in the transparent mode when LEAB is HIGH. When LEAB is LOW, the A data is latched if CLKAB is held at a HIGH or LOW logic level. If LEAB is LOW, the A bus data is stored in the latch/flip-flop on the HIGH-to-LOW transition of CLKAB. When OEAB is HIGH, the outputs are active. When OEAB is LOW, the outputs are in a highimpedance state. Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, and CLKBA. The output enables are complementary (OEAB is active HIGH and OEBA is active LOW). The VCX32500 is designed for low voltage (1.4V to 3.6V) VCC applications with I/O capability up to 3.6V. The 74VCX32500 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation. Note 1: To ensure the high-impedance state during power up or power down, OEBA should be tied to VCC through a pull-up resistor and OEAB s...