SN74ALVC162268 12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS

SCES051 - AUGUST 1995

features

B-Port Outputs Have Equivalent 26- Series Resistors, So No External Resistors Are Required
EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
Member of the Texas Instruments Widebus^TM Family
ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per JEDEC Standard JESD-17
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Package Options Include Plastic Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages
EPIC and Widebus are trademarks of Texas Instruments Incorporated.

description

The SN74ALVC162268 is a 12-bit to 24-bit registered bus exchanger, which is intended for use in applications where data must be transferred from a narrow high-speed bus to a wide, lower-frequency bus. This device is designed specifically for low-voltage (3.3-V) V_CC operation; it is tested at 2.5-V, 2.7-V, and 3.3-V V_CC.

The device provides synchronous data exchange between the two ports. Data is stored in the internal registers on the low-to-high transition of the clock (CLK) input when the appropriate clock-enable (CLKEN\) inputs are low. The select (SEL\) line is synchronous with CLK and selects 1B or 2B input data for the A outputs.

For data transfer in the A-to-B direction, a two-stage pipeline is provided in the A-to-1B path with a single storage register in the A-to-2B path. Proper control of these inputs allows two sequential 12-bit words to be presented synchronously as a 24-bit word on the B port. Data flow is controlled by the active-low output enables (OEA\, OEB\). These control terminals are registered so bus direction changes are synchronous with CLK.

The B outputs, which are designed to sink up to 12 mA, include 26- resistors to reduce overshoot and undershoot.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVC162268 is characterized for operation from -40°C to 85°C.

Title: 12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS
Product Family: UNIVERSAL BUS EXCHANGERS (UBES)
Device Functionality: INTERFACE
Orderable Devices: SN74ALVC162268DL, SN74ALVC162268DLR

View the complete PDF datasheet: sces051.pdf (130 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74ALVC162268

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