74AHCT244A
Octal buffer/line driver; 3-state
Rev. 1 — 23 November 2016
Product data sheet
1. General description
The 74AHCT244A is an 8-bit buffer/line driver with 3-state outputs and TTL inputs. The
device features two output enables (1OE and 2OE). A HIGH on nOE causes the
associated outputs to assume a high-impedance OFF-state.
Designed to operate over a VCC range from 4.5 V to 5.5 V, the inputs are TTL compatible,
which allows the device to be used to translate from 3.3 V to 5 V.
Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall
times.
This device is fully specified for partial Power-down applications using IOFF.
The IOFF circuitry disables the output, preventing the damaging backflow current through
the device when it is powered down.
2. Features and benefits
Direct interface with TTL levels
Supply voltage range from 4.5 V to 5.5 V
Typical tpd of 2.8 ns at 5 V
Typical VOL(p) < 0.8 V at VCC = 5 V, Tamb = 25 C
Typical VOH(v) > 2.3 V at VCC = 5 V, Tamb = 25 C
Supports mixed-mode voltage operation on all ports
IOFF circuitry provides partial Power-down mode operation
Latch-up performance exceeds 250 mA per JESD 78 Class II
ESD protection:
HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3 kV
MM JESD22-A115-A exceeds 150 V
CDM JESD22-C101E exceeds 2 kV
Specified from 40 C to +85 C and from 40 C to +125 C
74AHCT244A
Nexperia
Octal buffer/line driver; 3-state
3. Ordering information
Table 1.
Ordering information
Type number
Package
Temperature range Name
74AHCT244APW 40 C to +125 C
TSSOP20
Description
Version
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
4. Functional diagram
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