© 2000 Fairchild Semiconductor Corporation DS010649 www.fairchildsemi.com
February 1990
Revised August 2000
1
00370 Low
Power Univer
sal

Demult
ipl
exer
/Decode
r
100370
Low Power Universal Demultiplexer/Decoder
General Description
The 100370 universal demultiplexer/decoder functions as
either a dual 1-of-4 decoder or as a single 1-of-8 decoder,
depending on the signal applied to the Mode Control (M)
input. In the dual mode, each half has a pair of active-LOW
Enable (E) inputs. Pin assignments for the E inputs are
such that in the 1-of-8 mode they can easily be tied
together in pairs to provide two active-LOW enables (E
1a
to
E
1b
, E
2a
to E
2b
). Signals applied to auxiliary inputs H
a
, H
b
and H
c
determine whether the outputs are active HIGH or
active LOW. In the dual 1-of-4 mode the Address inputs are
A
0a
, A
1a
and A
0b
, A
1b
with A
2a
unused (i.e., left open, tied
to V
EE
or with LOW signal applied). In the 1-of-8 mode, the
Address inputs are A
0a
, A
1a
, A
2a
with A
0b
and A
1b
LOW or
OPEN. All inputs have 50 kΩ pull-down resistors.
Features
a73 35% power reduction of the 100170
a73 2000V ESD protection
a73 Pin/function compatible with 100170
a73 Voltage compensated operating range = −4.2V to −5.7V

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
24-Pin DIP 28-Pin PLCC
Order Number Package Number Package Description
100370PC N24E 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.400 Wide
100370QC V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
100370QI V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
Industrial Temperature Range (−40°C to +85°C)