October 1987

Revised January 1999

© 1999 Fairchild Semiconductor Corporation

DS005991.prf

www.fairchildsemi.com

CD4511BC

BCD-to-7 Segment Latch/Decoder/Driver

General Description

The CD4511BC BCD-to-seven segment latch/decoder/

driver is constructed with complementary MOS (CMOS)

enhancement mode devices and NPN bipolar output driv-

ers in a single monolithic structure. The circuit provides the

functions of a 4-bit storage latch, an 8421 BCD-to-seven

segment decoder, and an output drive capability. Lamp test

(LT), blanking (BI), and latch enable (LE) inputs are used to

test the display, to turn-off or pulse modulate the brightness

of the display, and to store a BCD code, respectively. It can

be used with seven-segment light emitting diodes (LED),

incandescent, fluorescent, gas discharge, or liquid crystal

readouts either directly or indirectly.

Applications include instrument (e.g., counter, DVM, etc.)

display driver, computer/calculator display driver, cockpit

display driver, and various clock, watch, and timer uses.

Features

s Low logic circuit power dissipation

s High current sourcing outputs (up to 25 mA)

s Latch storage of code

s Blanking input

s Lamp test provision

s Readout blanking on all illegal input combinations

s Lamp intensity modulation capability

s Time share (multiplexing) facility

s Equivalent to Motorola MC14511

Ordering Code:

Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Connection Diagrams

Pin Assignments for SOIC and DIP

Top View

Segment Identification

Order Number

Package Number

Package Description

CD4511BCWM

M16B

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide

CD4511BCN

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide