74HC244.PDF_74HC244资源-CSDN文库

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1. General description

The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device

can be used as two 4-bit buffers or one 8-bit buffer. The device features two output

enables (1OE

and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE

causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes

that enable the use of current limiting resistors to interface inputs to voltages in excess of

V

CC

.

2. Features and benefits

 Input levels:

 For 74HC244: CMOS level

 For 74HCT244: TTL level

 Octal bus interface

 Non-inverting 3-state outputs

 Complies with JEDEC standard no. 7 A

 ESD protection:

 HBM JESD22-A114F exceeds 2000 V

 MM JESD22-A115-A exceeds 200 V

 Multiple package options

 Specified from 40 Cto +85C and 40 Cto +125C

3. Ordering information

74HC244; 74HCT244

Octal buffer/line driver; 3-state

Rev. 4 — 24 September 2012 Product data sheet

Table 1. Ordering information

Type number Package

Temperature range Name Description Version

74HC244N 40 Cto+125C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1

74HCT244N

74HC244D 40 Cto+125C SO20 plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74HCT244D

74HC244DB 40 Cto+125C SSOP20 plastic shrink small outline package; 20 leads;

body width 5.3 mm

SOT339-1

74HCT244DB

74HC244PW 40 Cto+125C TSSOP20 plastic thin shrink small outline package; 20 leads;

body width 4.4 mm

SOT360-1

74HCT244PW

74HC244BQ 40 C to +125 C DHVQFN20 plastic dual-in-line compatible thermal enhanced

very thin quad flat package; no leads; 20 terminals;

body 2.5  4.5  0.85 mm

SOT764-1

74HCT244BQ

剩余17页未读，继续阅读

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