Octal Buffers & Line Drivers
Description
Standard Products
UT54ACS244/UT54ACTS244
Octal Buffers & Line Drivers, Three-State Outputs
Datasheet November 2010 www.
aeroflex.
com/logic
FEATURES Three-state outputs drive bus lines or buffer memory address
registers 1.
2μ CMOS
- Latchup immune High speed Low power consumption Single 5 volt supply Available QML Q or V processes Flexible package
- 20-pin DIP
- 20-lead flatpack UT54ACS244 - SMD 5962-96570 UT54ACTS244 - SMD 5962-96571
PINOUTS
DESCRIPTION The UT54ACS244 and the UT54ACTS244 are non-inverting octal buffer and line drivers which improve the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
The devices are characterized over full military temperature range of -55°C to +125°C.
FUNCTION TABLE
INPUTS 1G, 2G
L L H
A L H X
OUTPUT Y L H Z
LOGIC SYMBOL
1G (1) (2)
1A1 1A2 (4)
(6) 1A3
(8) 1A4
EN
(18) 1Y1
(16) 1Y2
(14) 1Y3
(12) 1Y4
1G
1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 VSS
(19) 2G
EN
(11) 2A1
(13) 2A2
(15) 2A3
(17) 2A4
(9) 2Y1
(7) 2Y2
(5) 2Y3
(3) 2Y4
Note: 1.
Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
1
20-Pin DIP Top View
1G 1 20 VDD 1A1 2 19 2G 2Y4 3 18 1Y1 1A2 4 17 2A4 2Y3 5 16 1Y2 1A3 6 15 2A3 2Y2 7 14 1Y3 1A4 8 13 2A2 2Y1 9 12 1Y4 VSS 10 11 2A1
20-Lead Flatpack Top View
1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11
VDD 2G 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
LOGIC DIAGRAM
1G (1) 1A1 (2) 1A2 (4)
(6) 1A3 1A4 (8)
(18) 1Y1 (16) 1Y2 (14)
1Y3 (12) 1Y4
2G (19) 2A1 (11) 2A2 (13)
(15) 2A3 2A4 (17)
(9) 2Y1 (7) 2Y2 (5)
2Y3 (3) 2Y4
2
OPERATIONAL ENVIRONMENT1 PARAMETER Total Dose SEU Threshold 2 SEL Threshold Neutron Fluence
LIMIT 1.
0E6
80
120 1.
0E14
UNITS rads(Si) MeV-cm2/mg MeV-cm2/mg n/cm2
Notes: 1.
Logic will not latchup during radiation exposure within the limits defined in the table 2.
Device storage elements are immune to SEU affects.
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
LIMIT
UNITS
VDD VI/O TSTG TJ TLS ...
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