Nexperia
HEF40244B
Octal buffers with 3-state outputs
5.2 Pin description
Table 2. Pin description
Symbol Pin Description
EOA, EOB 1, 19 output enable inputs (active low)
IA1, IA2, IA3, IA4 2, 4, 6, 8 data inputs
OA1, OA2, OA3, OA4 18, 16, 14, 12 data outputs
IB1, IB2, IB3, IB4 11, 13, 15, 17 data inputs
OB1, OB2, OB3, OB4 9, 7, 5, 3 data outputs
V
SS
10 ground supply voltage
V
DD
20 supply voltage
6 Functional description
Table 3. Function table
[1]
Control Input Output
EOA or EOB IAn or IBn OAn or OBn
L L L
L H H
H X Z
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
7 Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
V
DD
supply voltage −0.5 +18 V
V
I
input voltage −0.5 V
DD
+ 0.5 V
I
DD
supply current - ±100 mA
I
IK
input clamping current - ±10 mA
I
OK
output clamping current - ±25 mA
T
stg
storage temperature −65 +150 °C
T
amb
ambient temperature −40 +85 °C
T
amb
= -40 °C to +85 °CP
tot
total power dissipation
SO20 package
[1]
- 500 mW
P power dissipation per output - 100 mW
[1] For SO20 package: P
tot
derates linearly with 8 mW/K above 70 °C.
HEF40244B All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 4 — 29 June 2018
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