74HC244 Datasheet PDF - NXP Semiconductors
| Part Number | 74HC244 | |
| Description | Octal buffer/line driver | |
| Manufacturers | NXP Semiconductors | |
| Logo |  |
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74HC244; 74HCT244
Octal buffer/line driver; 3-state
Rev. 5 — 26 February 2016
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 Name
Description
Version
74HC244D
74HCT244D
40 C to +125 C SO20
plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HC244DB
74HCT244DB
40 C to +125 C SSOP20
plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HC244PW
74HCT244PW
40 C to +125 C TSSOP20 plastic thin shrink small outline package; 20 leads; SOT360-1
body width 4.4 mm
74HC244BQ
74HCT244BQ
40 C to +125 C
DHVQFN20 plastic dual-in-line compatible thermal enhanced SOT764-1
very thin quad flat package; no leads; 20 terminals;
body 2.5 4.5 0.85 mm
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NXP Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
Table 5. Recommended operating conditions …continued
Symbol
Parameter
Conditions
74HCT244
VCC
VI
VO
t/V
Tamb
supply voltage
input voltage
output voltage
input transition rise and fall rate VCC = 4.5 V
ambient temperature
9. Static characteristics
Min Typ Max Unit
4.5 5.0 5.5 V
0 - VCC V
0 - VCC V
- 1.67 139 ns/V
40 - +125 C
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions
25 C
40 C to +85 C 40 C to +125 C Unit
Min Typ Max Min Max Min Max
74HC244
VIH HIGH-level VCC = 2.0 V
input voltage VCC = 4.5 V
1.5 1.2 -
1.5
-
1.5
-V
3.15 2.4 - 3.15
-
3.15
-V
VCC = 6.0 V
4.2 3.2 -
4.2
-
4.2
-V
VIL
LOW-level
VCC = 2.0 V
input voltage VCC = 4.5 V
- 0.8 0.5
-
0.5
-
0.5 V
- 2.1 1.35 -
1.35
-
1.35 V
VCC = 6.0 V
- 2.8 1.8
-
1.8
-
1.8 V
VOH
HIGH-level VI = VIH or VIL
output voltage IO = 20 A; VCC = 2.0 V
1.9 2.0 -
1.9
-
1.9
-V
IO = 20 A; VCC = 4.5 V
4.4 4.5 -
4.4
-
4.4
-V
IO = 20 A; VCC = 6.0 V
5.9 6.0 -
5.9
-
5.9
-V
IO = 6.0 mA; VCC = 4.5 V
3.98 4.32 -
3.84
-
3.7
-V
IO = 7.8 mA; VCC = 6.0 V
5.48 5.81 -
5.34
-
5.2
-V
VOL LOW-level VI = VIH or VIL
output voltage IO = 20 A; VCC = 2.0 V
- 0 0.1
-
0.1
-
0.1 V
IO = 20 A; VCC = 4.5 V
- 0 0.1
-
0.1
-
0.1 V
IO = 20 A; VCC = 6.0 V
- 0 0.1
-
0.1
-
0.1 V
IO = 6.0 mA; VCC = 4.5 V
- 0.15 0.26 - 0.33 -
0.4 V
IO = 7.8 mA; VCC = 6.0 V
- 0.16 0.26 - 0.33 -
0.4 V
II input leakage VI = VCC or GND;
current
VCC = 6.0 V
- - 0.1 -
1.0
-
1.0 A
IOZ
OFF-state
VI = VIH or VIL; VCC = 6.0 V;
output current VO = VCC or GND
- - 0.5 - 5.0 -
10 A
ICC supply current VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
- - 8.0
-
80
-
160 A
CI input
capacitance
- 3.5 -
-
-
-
- pF
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 26 February 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
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