100370 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Low Power Universal Demultiplexer/Decoder

August 1998
100370
Low Power Universal Demultiplexer/Decoder
General Description
The 100370 universal demultiplexer/decoder functions as ei-
ther a dual 1-of-4 decoder or as a single 1-of-8 decoder, de-
pending 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 pulldown resistors.
Features
n 35% power reduction of the 100170
n 2000V ESD protection
n Pin/function compatible with 100170
n Voltage compensated operating range = −4.2V to −5.7V
Logic Symbols
Single 1-of 8 Application
Dual 1-of-4 Application
DS100311-1
Pin Names
A_na, A_nb
E_na, E_nb
M
H_a
H_b
H_c
Z₀– Z₇
Z_na, Z_nb
Description
Address Inputs
Enable Inputs
Mode Control Input
Z₀–Z₃ (Z_0a–Z_3a)
Polarity Select Input
Z₄–Z₇ (Z_0b–Z_3b)
Polarity Select Input
Common Polarity
Select Input
Single 1-of-8
Data Outputs
Dual 1-of-4
Data Outputs
© 1998 National Semiconductor Corporation DS100311
DS100311-4
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