74LCX646_04 datasheet, PDF - EEWORLD Datasheet

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74LCX646_04: DescriptionLOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE); File Size299KB，16 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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74LCX646_04 Overview

LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)

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74LCX646

LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER

WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)

5V TOLERANT INPUTS AND OUTPUTS

HIGH SPEED:

= 7.0 ns (MAX.) at V

= 3V

POWER DOWN PROTECTION ON INPUTS

AND OUTPUTS

SYMMETRICAL OUTPUT IMPEDANCE:

| = I

= 24mA (MIN) at V

= 3V

PCI BUS LEVELS GUARANTEED AT 24 mA

BALANCED PROPAGATION DELAYS:

PLH

≅

PHL

OPERATING VOLTAGE RANGE:

(OPR) = 2.0V to 3.6V (1.5V Data

Retention)

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 646

LATCH-UP PERFORMANCE EXCEEDS

500mA (JESD 17)

ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015);

MM > 200V

SOP

TSSOP

Table 1: Order Codes

PACKAGE

SOP

TSSOP

T&R

74LCX646RM13TR

74LCX646TTR

DESCRIPTION

The 74LCX646 is a low voltage CMOS OCTAL

BUS

TRANSCEIVER

AND

(3-STATE) fabricated with sub-micron silicon gate

and double-layer metal wiring C

MOS technology.

It is ideal for low power and high speed 3.3V

applications; it can be interfaced to 5V signal

environment for both inputs and outputs.

Figure 1: Pin Connection And IEC Logic Symbols

This device consists of bus transceiver circuits

with 3 state, D-type flip-flops, and control circuitry

arranged for multiplexed transmission of data

directly from the input bus or from the internal

registers. Data on the A or B bus will be clocked

into register on the low to high transition of the

appropriate 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

select BA) can multiplex stored and real time

(transparent mode) data. The direction control

determines which bus will receive data when

enable G is active (low). In the isolation mode

September 2004

Rev. 6

1/16

74LCX646_04 Related Products

	74LCX646_04	74LCX646RM13TR	74LCX646
Description	LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)	LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)	LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)

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