M74HC646

更新时间： 2024-09-17 22:57:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		总线收发器
页数	文件大小	规格书
12页	204K
描述
HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE

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M74HC646 数据手册

M74HC646

M74HC648

HC646 OCTAL BUS TRANSCEIVER/REGISTER (3-STATE)

HC648 OCTAL BUS TRANSCEIVER/REGISTER (3-STATE, INV.)

HIGH SPEED

f_MAX= 73 MHz (TYP.) AT V_CC= 5 V

LOW POWER DISSIPATION

I_CC= 4 µA (MAX.) AT T_A= 25 °C

HIGH NOISE IMMUNITY

V_NIH= V_NIL= 28 % V_CC(MIN.)

OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

SYMMETRICAL OUTPUT IMPEDANCE

I_OH= I_OL= 6 mA (MIN.)

BALANCED PROPAGATION DELAYS

t_PLH= t_PHL

WIDE OPERATING VOLTAGE RANGE

B1R

(Plastic Package)

M1R

(Micro Package)

ORDER CODES :

M74HCXXXM1R

M74HCXXXB1R

V_CC(OPR) = 2 V TO 6 V

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS646/648

DESCRIPTION

PIN CONNECTIONS (top view)

The M74HC646/648 are high speed CMOS OCTAL

BUS TRANSCEIVERS AND REGISTERS, (3-

STATE) fabricated in silicon gate C²MOS technol-

ogy. They have the same high speed performance

of LSTTL combined with trueCMOS low power con-

sumption.

These devices consist of bus transceiver circuits

with 3-state output, D-type flip-flops, and control cir-

cuitry arranged for multiplexed transmission of data

directly from the input bus or from the internal reg-

isters. Data on the Aor B bus will be clocked into the

registers on the low-to-high transition of the appro-

priate clock pin (Clock AB- or Clock BA). Enable(G)

and direction (DIR) pins are provided to control the

transceiver functions. In the transceiver mode, data

present at the high-impedance port may be stored

in either register or in both.

INPUT AND OUTPUT EQUIVALENT CIRCUIT

The select controls (Select AB select BA) can multi-

plex stored and real-time (transparent mode) data.

The direction control determines which bus will re-

ceive data when enable G is active (low).

GAB, GAB, CAB,

SAB, SBA, CBA

A, B

In the isolation mode (enable G high), ”A” data may

be stored in one register and/or ”B” data may be

storedin the other register. When anoutput function

is disabled, the input function is still enabled and

may be used to store and transmit data. Only one

of the two buses, A or B, may be driven at a time.

All inputs are equipped with protection circuits

October 1993

1/12

12 3 4 5 6 7...12

中文翻译

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与M74HC646相关器件

型号	品牌	获取价格	描述	数据表
M74HC646B1N	STMICROELECTRONICS	获取价格	HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24, PLASTIC, DIP-24
M74HC646B1R	STMICROELECTRONICS	获取价格	HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-
M74HC646F1	STMICROELECTRONICS	获取价格	HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDIP24, FRIT SEALED, CERAMIC, DIP
M74HC646M1	STMICROELECTRONICS	获取价格	HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, MICRO, PLASTIC, DIP-24
M74HC646M1R	STMICROELECTRONICS	获取价格	HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-
M74HC646TTR	STMICROELECTRONICS	获取价格	暂无描述
M74HC648	STMICROELECTRONICS	获取价格	HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-
M74HC648B1N	STMICROELECTRONICS	获取价格	HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24, PLASTIC, DIP-24
M74HC648B1R	STMICROELECTRONICS	获取价格	HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-
M74HC648DWP	MITSUBISHI	获取价格	Registered Bus Transceiver, 1-Func, 8-Bit, Inverted Output, CMOS, PDSO24

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