PI74ALVCH16721A【PDF 1/5 页】IC 20-BIT FLIP-FLOP 56-TSSOP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录2040

[1页]2页 3页 4页 5页

PS8090C 02/07/00

Product Description

Pericom Semiconductors PI74ALVCH series of logic circuits are

produced in the Companys advanced 0.5 micron CMOS

technology, achieving industry leading speed.

The PI74ALVCH16721 is a 20-bit flip-flop with 3-state outputs

designed specifically for 2.3V to 3.6V VCC operation. The

PI74ALVCH16721 is designed with edge-triggered D-type flip-

flops with qualified clock storage. On the positive transition of

clock (CLK) input, the device provides true data at the Q outputs,

provided that the clock-enable (CLKEN) input is LOW. If CLKEN

is HIGH, no data is stored.

A buffered output-enable (OE) input can be used to place the

20 outputs in either a normal logic state (HIGH or LOW level) or

a high-impedance state. In the high-impedance state, the outputs

neitherloadnordrivethebuslinessignificantly.Thehigh-impedance

state and increased drive provide the capacity to drive bus lines

without the need for interface or pullup components. OE does not

affect the internal operation of the flip-flops. Old data can be

retained or new data can be entered while the outputs are in the

high-impedance state.

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.

The PI74ALVCH16721 data has Bus Hold which retains the

data inputs last state whenever the data input goes to high-

impedance preventing floating inputs and eliminating the need

for pullup/down resistors.

Product Features

PI74ALVCH16721 is designed for low voltage operation

VCC = 2.3V to 3.6V

Hysteresis on all inputs

Typical VOLP (Output Ground Bounce)

< 0.8V at VCC = 3.3V, TA = 25°C

Typical VOHV (Output VOH Undershoot)

< 2.0V at VCC = 3.3V, TA = 25°C

Bus Hold retains last active bus state during 3-STATE,

eliminating the need for external pullup resistors

Industrial operation at 40°C to +85°C

Packages available:

56-pin 240 mil wide plastic TSSOP (A)

56-pin 300 mil wide plastic SSOP (V)

Logic Block Diagram

12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

3.3V 20-Bit Flip-Flop

with 3-STATE Outputs

PI74ALVCH16721

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式