UT54ACS245 Datasheet, PDF (1/10 Pages) Aeroflex Circuit Technology – Octal Bus Transceiver with Three-State Outputs

Standard Products
UT54ACS245/UT54ACTS245
Octal Bus Transceiver with Three-State Outputs
Datasheet
November 2010
www.aeroflex.com/logic
FEATURES
‰ Three-state outputs drive bus line directly
‰ 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
‰ UT54ACS245 - SMD 5962-96572
‰ UT54ACTS245 - SMD 5962-96573
DESCRIPTION
The UT54ACS245 and the UT54ACTS245 are non-inverting
octal bus transceivers designed for asynchronous two-way com-
munication between data buses. The control function imple-
mentation minimizes external timing requirements.
The devices allow data transmission from the A bus to the B bus
or from the B bus to the A bus depending upon the logic level
at the direction control (DIR) input. The enable input (G) dis-
ables the device so that the buses are effectively isolated.
The devices are characterized over full military temperature
range of -55°C to +125°C.
FUNCTION TABLE
ENABLE DIRECTION
G
CONTROL DIR
OPERATION
L
L
B Data To A Bus
L
H
A Data To B Bus
H
X
Isolation
PINOUTS
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V_SS
20-Pin DIP
Top View
DIR
1 20
V_DD
A1 2 19 G
A2 3 18 B1
A3 4 17 B2
A4 5 16 B3
A5 6 15 B4
A6 7 14 B5
A7 8 13 B6
A8 9 12 B7
V_SS
10 11
B8
20-Lead Flatpack
Top View
1 20
V_DD
2 19
G
3 18
B1
4 17
B2
5 16
B3
6 15
B4
7 14
B5
8 13
B6
9 12
B7
10 11
B8
LOGIC SYMBOL
(19)
G
(1)
DIR
(2)
A1
(3)
A2
(4)
A3
(5)
A4
(6)
A5
(7)
A6
(8)
A7
A8 ⁽⁹⁾
G3
3 EN1 (BA)
3 EN2 (AB)
1
2
(18)
B1
(17)
B2
(16)
B3
(15)
B4
(14)
B5
(13)
(12) ^B6
B7
(11)
B8
Note:
1 ^{1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC}
Publication 617-12.