Datasheet

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