54ACT16475, 74ACT16475
18-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCAS198A - OCTOBER 1990 - REVISED APRIL 1996

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

features

• Members of the Texas Instruments Widebus^TM Family
• Inputs Are TTL-Voltage Compatible
• 3-State Inverting Outputs
• Flow-Through Architecture Optimizes PCB Layout
• Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
• 500-mA Typical Latch-Up Immunity at 125°C
• Packaged in Plastic 300-mil Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings

EPIC and Widebus are trademarks of Texas Instruments Incorporated.

description

The 'ACT16475 are 18-bit registered transceivers that contain two sets of D-type flip-flops for temporary storage of data flowing in either direction. They can be used as two 9-bit transceivers or one 18-bit transceiver. Separate clock (CLKAB and CLKBA) and output-enable (or) inputs are provided for each register to permit independent control in either direction of data flow.

Data at the A inputs meeting the setup time requirements is transferred to the B outputs on the positive-going edge of CLKAB. Withlow, the 3-state B outputs are enabled and reflect the inverted A data. Data flow from B to A is similar but requires the use of the CLKBA andinputs.

The 74ACT16475 is packaged in TI's shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area.

The 54ACT16475 is characterized for operation over the full military temperature range of -55°C to 125°C. The 74ACT16475 is characterized for operation from -40°C to 85°C.

A-to-B data flow is shown: B-to-A flow is similar but uses CLKBA and OEBA\.

Output level before the indicated steady-state input conditions were established