SN54LVCH245A, SN74LVCH245A OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SCES008E - JULY 1995 - REVISED JANUARY 1998

features

EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
Typical V_OLP (Output Ground Bounce) < 0.8 V at V_CC = 3.3 V, T_A = 25°C
Typical V_OHV (Output V_OH Undershoot) > 2 V at V_CC = 3.3 V, T_A = 25°C
Power Off Disables Outputs, Permitting Live Insertion
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
Support Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V V_CC)
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Ceramic (J) DIPs
EPIC is a trademark of Texas Instruments Incorporated.

description

These octal bus transceivers are designed for 2.7-V to 3.6-V V_CC operation.

The 'LVCH245A devices are designed for asynchronous communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE\) input can be used to disable the device so the buses are effectively isolated.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

To ensure the high-impedance state during power up or power down, OE\ 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 SN54LVCH245A is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LVCH245A is characterized for operation from -40°C to 85°C.

Title: OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
Product Family: STANDARD TRANSCEIVERS
Device Functionality: OCTAL BUS TRASCEIVER
Orderable Devices: SN74LVCH245ADBLE, SN74LVCH245ADW, SN74LVCH245ADWR, SN74LVCH245APWLE

View the complete PDF datasheet: sces008e.pdf (101 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74LVCH245A

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