HEF4511BD Philips Semiconductors, HEF4511BD Datasheet - Page 2

• Manufacturer Part Number: HEF4511BD
• Description: BCD to 7-segment latch/decoder/driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4511B is a BCD to 7-segment
latch/decoder/driver with four address inputs (D
an active LOW latch enable input (EL), an active LOW
ripple blanking input (BI), an active LOW lamp test input
(LT), and seven active HIGH n-p-n bipolar transistor
segment outputs (O
January 1995
BCD to 7-segment latch/decoder/driver
Fig.3 Schematic diagram of output stage.
Fig.1 Functional diagram.
a
to O
g
).
A
to D
D
),
2
When EL is LOW, the state of the segment outputs (O
O
When EL goes HIGH, the last data present on D
D
remain stable. When LT is LOW, all the segment outputs
are HIGH independent of all other input conditions. With
LT HIGH, a LOW on BI forces all segment outputs LOW.
The inputs LT and BI do not affect the latch circuit.
PINNING
FAMILY DATA, I
See Family Specifications
HEF4511BP(N):
HEF4511BD(F):
HEF4511BT(D):
( ): Package Designator North America
D
EL
BI
LT
O
D
g
A
a
) is determined by the data on D
are stored in the latches and the segment outputs
Fig.4
to D
to O
D
g
Segment
designation.
address (data) inputs
latch enable input (active LOW)
ripple blanking input (active LOW)
lamp test input (active LOW)
segment outputs
DD
Fig.2 Pinning diagram.
LIMITS category MSI
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) (SOT74)
16-lead SO; plastic (SOT109-1)
Product specification
A
to D
HEF4511B
D
.
A
MSI
to
a
to