74ALVCH16245DGVRG4.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Member of the Texas Instruments Widebus™

Family

• Operates From 1.65 V to 3.6 V

• Max t pd of 3 ns at 3.3 V

• ±24-mA Output Drive at 3.3 V

• Bus Hold on Data Inputs Eliminates the Need for

External Pullup or Pulldown Resistors

• 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)

2 Applications

• Cable Modem Termination Systems

• Servers

• LED Displays

• Network Switches

• Telecom Infrastructure

• Motor Drivers

• I/O Expanders

3 Description

This 16-bit (dual-octal) noninverting bus transceiver is

designed for 1.65-V to 3.6-V VCC operation.

The SN74ALVCH16245 device is designed for

asynchronous communication between two data

buses. The logic levels of the direction-control (DIR)

input and the output-enable (OE) input activate either

the B-port outputs or the A-port outputs or place both

output ports into the high-impedance mode. The

device transmits data from the A bus to the B bus

when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are

activated. The input circuitry on both A and B ports is

always active and must have a logic high or low level

applied to prevent excess ICC and ICCZ.

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.

Active bus-hold circuitry holds unused or undriven

inputs at a valid logic state. Use of pullup or pulldown

resistors with the bus-hold circuitry is not

recommended.