Member of the Texas Instruments

Widebus Family

5-Ω Switch Connection Between Two Ports

Rail-to-Rail Switching on Data I/O Ports

Ioff Supports Partial-Power-Down Mode

Operation

Latch-Up Performance Exceeds 250 mA Per

JESD 17

ESD Protection Exceeds JESD 22

? 2000-V Human-Body Model (A114-A)

? 200-V Machine Model (A115-A)

description/ordering information

The SN74CBTLV16211 provides 24 bits of

high-speed bus switching. The low on-state

resistance of the switch allows connections to be

made with minimal propagation delay.

The device is organized as dual 12-bit bus

switches with separate output-enable (OE)

inputs. It can be used as two 12-bit bus switches

or as one 24-bit bus switch. When OE is low, the

associated 12-bit bus switch is on, and port A is

connected to port B. When OE is high, the switch

is open, and the high-impedance state exists

between the two ports.

This device is fully specified for

partial-power-down applications using Ioff. The Ioff

feature ensures that damaging current will not

backflow through the device when it is powered

down. The device has isolation during power off.

To ensure the high-impedance state during power

up or power down, OE should be tied to VCC

through a pullup resistor; the minimum value of

the resistor is determined by the current-sinking

capability of the driver.