HEF40244BD Philips Semiconductors, HEF40244BD Datasheet - Page 2

• Manufacturer Part Number: HEF40244BD
• Description: Octal buffers with 3-state outputs
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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 EO
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.
January 1995
Octal buffers with 3-state outputs
A
and EO
Fig.1 Functional diagram.
B
. A HIGH on EO causes the outputs to
2
PINNING
FAMILY DATA, I
See Family Specifications
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
I
I
O
O
EO
A1
B1
A1
B1
A
to I
to I
to O
to O
, EO
A4
B4
A4
B4
B
DD
Fig.2 Pinning diagram.
inputs
inputs
bus outputs
bus outputs
output enable inputs (active LOW)
LIMITS category buffers
Product specification
HEF40244B
buffers