54AC16470,74AC16470
16-BIT REGISTERED TRANCEIVERS
WITH 3-STATE OUTPUTS
SCASS395 - JUNE 1990 - REVISED DECEMBER 1991

features

• Members of the Texas Instruments Widebus^TM Family
• Packaged in Shrink Small-Outline 300-mil Packages (DL) and 380-mil Fine-Pitch Ceramic Flat Packages (WD) Using 25-mil Center-to-Center Pin Spacings
• Flow-Through Architecture Optimizes Printed-Circuit-Board (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

description

These devices are 16-bit registered transceivers that contain two sets of D-type flip-flops for temporary storage of data flowing in either direction. The device can be used as two 8-bit tranceivers or one 16-bit transceiver. Separate clock (CLKAB or CLKBA) and output-enable ( or ) inputs are provided for each register to permit independent control in either direction of data flow.

The A-to-B Enable () input must be low in order to enter data from A or to output data to B. If both and CLKAB are low, then B port will have the level of A port prior to the most recent low-to-high transition of CLKAB. Data flow from B to A is similar, but requires the use of , CLKBA, and inputs.

To avoid false clocking of the flip-flops, should not be switched from high to low while CLK is high.

The 74AC16470 is packaged in TI shrink small-outline package (DL), which provides twice the I/O pin count and functionality of standard small-outline packages in the same PCB area.

The 54AC16470 is characterized over the full military temperature range of -55°C to 125°C. The 74AC16470 is characterized for operation from -40°C to 85°C.