HEF40373 Philips Semiconductors, HEF40373 Datasheet - Page 2

• Manufacturer Part Number: HEF40373
• Description: Octal transparent latch with 3-state outputs
• Manufacturer: Philips Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF40373B is an 8-bit transparent latch with 3-state
buffered outputs. The output stages have high current
output capability suitable for driving highly capacitive
loads. The latch outputs follow the data inputs when the
latch enable (E) is HIGH. When E is LOW, the data that
meets the set-up times is latched. The 3-state outputs are
controlled by the output enable input EO. A HIGH on
January 1995
HEF40373BP(N): 20-lead DIL; plastic
HEF40373BD(F): 20-lead DIL; ceramic (cerdip)
HEF40373BT(D): 20-lead SO; plastic
( ): Package Designator North America
Octal transparent latch with 3-state outputs
Fig.1 Functional diagram.
(SOT146-1)
(SOT152)
(SOT163-1)
2
EO causes the outputs to assume a high impedance
OFF-state. The device features hysteresis on the E input
to improve noise rejection.
Schmitt-trigger action in the E input makes the circuit
highly tolerant to slower input rise and fall times.
The HEF40373B is pin and functionally compatible with
the TTL ‘373’ device.
Supply voltage range: 3 to 15 V.
PINNING
FAMILY DATA, I
See Family Specifications
D
E
EO
O
0
0
to D
to O
7
7
data inputs
latch enable input
output enable input (active LOW)
3-state buffered outputs
DD
Fig.2 Pinning diagram.
LIMITS category MSI
Product specification
HEF40373B
MSI