hef40240b NXP Semiconductors, hef40240b Datasheet - Page 2

• Manufacturer Part Number: hef40240b
• Description: Octal Inverting Buffers With 3-state Outputs
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF40240B is an octal 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 HEF40240B is pin and functionally compatible with
the TTL ‘240’ device.
January 1995
Octal inverting 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
HEF40240BP(N): 20-lead DIL; plastic (SOT146-1)
HEF40240BD(F): 20-lead DIL; ceramic (cerdip) (SOT152)
HEF40240BT(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
HEF40240B
buffers