74HC244; 74HCT244
Octal buffer/line driver; 3-state
Rev. 6 — 27 September 2019
Product data sheet
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 VCC.
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 °C to +85 °C and -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
74HC244D
-40 °C to +125 °C
74HCT244D
74HC244DB
-40 °C to +125 °C
74HCT244DB
74HC244PW
-40 °C to +125 °C
74HCT244PW
74HC244BQ
-40 °C to +125 °C
74HCT244BQ
Name
SO20
Description
plastic small outline package; 20 leads;
body width 7.5 mm
SSOP20
plastic shrink small outline package; 20 leads;
body width 5.3 mm
TSSOP20 plastic thin shrink small outline package;
20 leads; body width 4.4 mm
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
Version
SOT163-1
SOT339-1
SOT360-1
SOT764-1
