SN74ABT25241 25- OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS

SCBS249 - JUNE 1992 - REVISED JULY 1993

features

• State-of-the-Art EPIC-IIB ^TM BiCMOS Design Significantly Reduces Power Dissipation
• 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 500 mA Per JEDEC Standard JESD-17
• Typical V_OLP (Output Ground Bounce) < 1 V at V_CC = 5 V, T_A = 25°C
• Designed to Facilitate Incident-Wave Switching for Line Impedances of 25
  or Greater
• Distributed V_CC and GND Pins Minimize Noise Generated by the Simultaneous Switching of Outputs
• Bus-Hold Inputs Eliminate the Need for External Pullup Resistors
• Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs

EPIC-IIB is a trademark of Texas Instruments Incorporated.

description

The SN74ABT25241 is a 25- octal buffer and line driver designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers.

The SN74ABT25241 contains complementary output-enable (1 and 2OE) inputs. When 1 is low and 2OE is high, the device transmits data from the A inputs to the Y outputs. When 1 and 2OE are high, the outputs are in the high-impedance state. Output-enable 1 affects only the 1Y outputs; output-enable 2OE affects only the 2Y outputs.

This buffer/driver is capable of sinking 188 mA of I_OL current, which facilitates switching 25- transmission lines on the incident wave. The distributed V_CC and GND pins minimize switching noise for more reliable system operation.

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

To ensure the high-impedance state during power up or power down, 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. OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

The SN74ABT25241 is characterized for operation from -40°C to 85°C.