HEC40244B 查看數據表（PDF） - Philips Electronics
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HEC40244B Datasheet PDF : 6 Pages
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Philips Semiconductors
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
inputs EOA and EOB. A HIGH on EO 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.
Product specification
HEF40244B
buffers
Fig.1 Functional diagram.
January 1995
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
IA1 to IA4
IB1 to IB4
OA1 to OA4
OB1 to OB4
EOA, EOB
inputs
inputs
bus outputs
bus outputs
output enable inputs (active LOW)
FAMILY DATA, IDD LIMITS category buffers
See Family Specifications
2
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