SN74ALVCH16500 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

SCES023E - JULY 1995 - REVISED SEPTEMBER 1997

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features

Member of the Texas Instruments Widebus^TM Family
EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
UBT^TM (Universal Bus Transceiver) Combines D-Type Latches and D-Type Flip-Flops for Operation in Transparent, Latched, or Clocked Mode
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, UBT, and Widebus are trademarks of Texas Instruments Incorporated.

description

This 18-bit universal bus transceiver is designed for 2.3-V to 3.6-V V_CC operation.

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 data is stored in the latch/flip-flop on the high-to-low transition of CLKAB\. Output-enable OEAB is active high. When OEAB is high, the B-port outputs are active. When OEAB is low, the B-port outputs are in the high-impedance 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).

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

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

The SN74ALVCH16500 is characterized for operation from -40°C to 85°C

Title: 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Product Family: UNIVERSAL BUS TRANSCEIVERS (UBTS)
Device Functionality: 18-BIT BUS TRANSCEIVERS
Orderable Devices: SN74ALVCH16500DGGR, SN74ALVCH16500DL, SN74ALVCH16500DLR

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