SN74ALVCHR162409 9-BIT, 4-PORT UNIVERSAL BUS EXCHANGER WITH 3-STATE OUTPUTS

SCES056D - SEPTEMBER 1995 - REVISED JANUARY 1998

features

Member of the Texas Instruments Widebus+^TM Family
EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
B-Port Outputs Have Equivalent 26- Series Resistors, So No External Resistors Are Required
UBE^TM (Universal Bus Exchanger) Allows Synchronous Data Exchange
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per JESD 17
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages

EPIC, UBE, and Widebus+ are trademarks of Texas Instruments Incorporated.

description

This 9-bit, 4-port universal bus exchanger is designed for 2.3-V to 3.6-V V_CC operation.

The SN74ALVCHR162409 allows synchronous data exchange between four different buses. Data flow is controlled by the select (SEL0-SEL4) inputs. A data-flow state is stored on the rising edge of the clock (CLK) input if the select-enable (SELEN\) input is low. Once a data-flow state has been established, data is stored in the flip-flop on the rising edge of CLK if SELEN\ is high.

The data-flow control logic is designed to allow glitch-free data transmission.

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

When preset (PRE\) transitions high, the outputs are disabled immediately without waiting for a clock pulse. To leave the high-impedance state, both PRE\ and SELEN\ must be low and a clock pulse must be applied.

To ensure the high-impedance state during power up or power down, PRE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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

The SN74ALVCHR162409 is characterized for operation from -40°C to 85°C.

Title: 9-BIT,4-PORT UNIVERSAL BUS EXCHANGER WITH 3-STATE OUTPUTS
Product Family: UNIVERSAL BUS EXCHANGERS (UBES)
Device Functionality: 9-BIT, 4-PORT UNIVERSAL BUS EXCHANGER
Orderable Devices: SN74ALVCHR162409DL, SN74ALVCHR162409DLR

View the complete PDF datasheet: sces056d.pdf (129 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74ALVCHR162409

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