SN74ALVCH162260集成电路（IC）的锁存器规格书PDF中文资料

SN74ALVCH162260属于集成电路（IC）的锁存器。由德州仪器制造生产的SN74ALVCH162260锁存器锁存器是类似于触发器的基本数字存储设备，但是不同之处在于，在锁存使能（或类似命名）信号处于有效逻辑状态的任何时间，保持的逻辑状态都可以改变。“透明”锁存器还允许设备输出在锁存使能信号有效时反映输入的当前状态，而相反的是，状态仅在保持状态已固定时改变。

FEATURES

· Member of the Texas Instruments Widebus™

Family

· EPIC™ (Enhanced-Performance Implanted

CMOS) Submicron Process

· B-Port Outputs Have Equivalent 26-W Series

Resistors, So No External Resistors Are

Required

· 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 Thin-Shrink

Small-Outline (DGG) and Plastic Shrink

Small-Outline (DL) Packages

DESCRIPTION

This 12-bit to 24-bit multiplexed D-type latch is

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

The SN74ALVCH162260 is used in applications in

which two separate data paths must be multiplexed

onto, or demultiplexed from, a single data path.

Typical applications include multiplexing and/or

demultiplexing address and data information in

microprocessor or bus-interface applications. This

device also is useful in memory-interleaving

applications.

Three 12-bit I/O ports (A1-A12, 1B1-1B12, and 2B1-2B12) are available for address and/or data transfer. The

output-enable (OE1B, OE2B, and OEA) inputs control the bus transceiver functions. The OE1B and OE2B

control signals also allow bank control in the A-to-B direction.

Address and/or data information can be stored using the internal storage latches. The latch-enable (LE1B, LE2B,

LEA1B, and LEA2B) inputs are used to control data storage. When the latch-enable input is high, the latch is

transparent. When the latch-enable input goes low, the data present at the inputs is latched and remains latched

until the latch-enable input is returned high.

The B outputs, which are designed to sink up to 12 mA, include equivalent 26-W resistors to reduce overshoot

and undershoot.

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 is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVCH162260 is characterized for operation from -40°C to 85°C.