UT54ACS85 Datasheet, PDF (1/10 Pages) Aeroflex Circuit Technology – 4-Bit Comparators

Standard Products
UT54ACS85/UT54ACTS85
4-Bit Comparators
Datasheet
November 2010
www.aeroflex.com/logic
FEATURES
‰ 1.2μ CMOS
- Latchup immune
‰ High speed
‰ Low power consumption
‰ Single 5 volt supply
‰ Available QML Q or V processes
‰ Flexible package
- 16-pin DIP
- 16-lead flatpack
‰ UT54ACS85 - SMD 5962-96536
‰ UT54ACTS85 - SMD 5962-96537
DESCRIPTION
The UT54ACS85 and the UT54ACTS85 are 4-bit magnitude
comparators that perform comparison of straight binary and
straight BCD (8-4-2-1) codes. Three fully decoded decisions
about two 4-bit words (A, B) are made and are externally avail-
able at three outputs. Devices are fully expandable to any num-
ber of bits without external gates. The cascading paths of the
devices are implemented with only a two-gate-level delay to
reduce overall comparison times for long words. An alternate
method of cascading which further reduces the comparison time
is shown in the typical application data.
The devices are characterized over full military temperature
range of -55°C to +125°C.
LOGIC SYMBOL
A0 ⁽¹⁰⁾ 0 ^COMP
A1 ⁽¹²⁾
A2 ⁽¹³⁾
A
A3 ⁽¹⁵⁾ ₃
(A<B)IN ⁽²⁾ <
(A=B)IN ⁽³⁾ ₌
(A>B)IN ⁽⁴⁾ >
B0 ⁽⁹⁾ ₀
B1 ⁽¹¹⁾
B2 ⁽¹⁴⁾
B
<
(7) _(A<B)OUT
=
(6) _(A=B)OUT
>
(5) _(A>B)OUT
B3 ⁽¹⁾ 3
Note:
1. Logic symbol in accordance with ANSI/IEEE standard 91-1984 and IEC
Publication 617-12.
PINOUTS
16-Pin DIP
Top View
B3
1 16
V_DD
(A<B)IN 2 15 ^A3
(A=B)IN 3 14 ^B2
(A>B)IN 4 13 ^A2
(A>B)OUT 5 12 ^A1
(A=B)OUT 6 11 ^B1
(A<B)OUT 7 10 ^A0
V_SS
8
9
B0
16-Lead Flatpack
Top View
B3
1 16
V_DD
(A<B)IN
2 15
A3
(A=B)IN
3 14
B2
(A>B)IN
4 13
A2
(A>B)OUT
5 12
A1
(A=B)OUT
6 11
B1
(A<B)OUT
7 10
A0
V_SS
8
9
B0
1