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參數(shù)資料
| 型號(hào)： | MM54HC299 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 8-Bit TRI-STATE Universal Shift Register |
| 中文描述： | 8位三態(tài)通用移位寄存器 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大小： | 181K |
| 代理商： | MM54HC299 |
TL/F/5207
M
January 1988
MM54HC299/MM74HC299
8-Bit TRI-STATE
é
Universal Shift Register
General Description
This8-bitTRI-STATEshift/storageregisterutilizesadvanced
silicon-gate CMOS technology. Along with the low power
consumption and high noise immunity of standard CMOS
integrated circuits, it has the ability to drive 15 LS-TTL
loads. This circuit also features operating speeds compara-
ble to the equivalent low power Schottky device.
The MM54HC299/MM74HC299 features multiplexed in-
puts/outputs to achieve full 8-bit data handling in a single
20-pin package. Due to the large output drive capability and
TRI-STATE feature, this device is ideally suited for interfac-
ing with bus lines in a bus oriented system.
Two function select inputs and two output control inputs are
used to choose the mode of operation as listed in the func-
tion table. Synchronous parallel loading is accomplished by
taking both function select lines S0 and S1 high. This places
the TRI-STATE outputs in a high impedance state, which
permits data applied to the input/output lines to be clocked
into the register. Reading out of the register can be done
while the outputs are enabled in any mode. A direct overrid-
ing CLEAR input is provided to clear the register whether
the outputs are enabled or disabled.
The 54HC/74HC logic family is functionally as well as pinout
compatible with the standard 54LS/74LS logic family. All
inputs are protected from damage due to static discharge by
internal diode clamps to V
CC
and ground.
Features
Y
Typical operating frequency 40 MHz
Y
Typical propagation delay: 20 ns
Y
Low quiescent current: 80
m
A maximum (74HC)
Y
High output drive for bus applications
Y
Low quiescent current: 1
m
A maximum
Connection Diagram
Dual-In-Line Package
TL/F/5207–1
Order Number MM54HC299 or MM74HC299
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM54HC299J | WIRE |
| MM74HC299 | NUT |
| MM74HC299J | NUT |
| MM74HC299N | CLAMP |
| MM54HC30 | 8-Input NAND Gate |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM54HC299E/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MM54HC299J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit TRI-STATE Universal Shift Register |
| MM54HC299J/883 | 制造商:Texas Instruments 功能描述: |
| MM54HC30 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Input NAND Gate |
| MM54HC30J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Input NAND Gate |
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