Philips hef40244b DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
For a complete data sheet, please also download:
•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF40244B
buffers
Octal buffers with 3-state outputs
Product specification
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors Product specification
Octal buffers with 3-state outputs
DESCRIPTION
The HEF40244B is an octal non-inverting buffer with
3-state outputs. It features output stages with high current
output capability suitable for driving highly capacitive
loads.
The 3-state outputs are controlled by the output enable
inputsEOAandEOB. A HIGH onEO causes the outputs to
assume a high impedance OFF-state. The device also
features hysteresis on all inputs to improve noise
immunity.
Schmitt-trigger action in the inputs makes the circuit highly
tolerant to slower input rise and fall times.
The HEF40244B is pin and functionally compatible with
the TTL ‘244’ device.
HEF40244B
buffers
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
HEF40244BP(N): 20-lead DIL; plastic (SOT146-1)
HEF40244BD(F): 20-lead DIL; ceramic (cerdip) (SOT152)
HEF40244BT(D): 20-lead SO; plastic (SOT163-1)
( ): Package Designator North America
PINNING
to I
I
A1
A4
I
to I
B1
B4
O
to O
A1
A4
to O
O
B1
B4
EOA, EO
B
FAMILY DATA, I
inputs
inputs
bus outputs
bus outputs
output enable inputs (active LOW)
LIMITS category buffers
DD
See Family Specifications
January 1995 2
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