UT54ACS245S

Standard Products
UT54ACS245S
Schmitt Octal Bus Transceiver with Three-State Outputs
Datasheet
November 2010
www.aeroflex.com/logic
PINOUTS
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
‰ UT54ACS245S - SMD 5962-96572
20-Pin DIP
Top View
DESCRIPTION
The UT54ACS245S is a non-inverting octal bus transceiver with
Schmitt Trigger input levels. The circuit is designed for asynchronous two-way communication between data buses. The
control function implementation minimizes external timing requirements.
The device is characterized over full military temperature range
of -55°C to +125°C.
FUNCTION TABLE
DIRECTION
CONTROL DIR
OPERATION
L
L
B Data To A Bus
L
H
A Data To B Bus
H
X
1
2
20
19
VDD
G
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A5
A6
6
7
15
14
B4
B5
A7
A8
8
9
13
12
B6
B7
VSS
10
11
B8
20-Lead Flatpack
Top View
The device allows 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) disables the device so that the buses are effectively isolated.
ENABLE
G
DIR
A1
DIR
1
20
VDD
A1
2
19
G
A2
3
18
B1
A3
A4
4
5
17
16
B2
B3
A5
6
15
B4
A6
7
14
B5
A7
A8
VSS
8
9
10
13
12
11
B6
B7
B8
LOGIC SYMBOL
G
Isolation
DIR
A1
A2
A3
A4
A5
A6
A7
A8
1
(19)
(1)
(2)
(3)
G3
3 EN1 (BA)
3 EN2 (AB)
(18)
1
B1
2
(17)
(4)
(16)
(5)
(6)
(15)
(7)
(8)
(9)
(14)
B2
B3
B4
B5
(13)
B6
(12)
B7
(11)
B8
Note:
1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
LOGIC DIAGRAM
DIR
(1)
A1
(19)
(2)
(18)
A2
B6
(8)
(12)
A8
B5
(7)
(13)
A7
B4
(6)
(14)
A6
B3
(5)
(15)
A5
B2
(4)
(16)
A4
B1
(3)
(17)
A3
G
B7
(9)
(11)
2
B8
OPERATIONAL ENVIRONMENT1
PARAMETER
LIMIT
UNITS
Total Dose
1.0E6
rads(Si)
SEU Threshold 2
80
MeV-cm2/mg
SEL Threshold 3
120
MeV-cm2/mg
Neutron Fluence
1.0E14
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
Supply voltage
-0.3 to 7.0
V
VI/O
Voltage any pin
-.3 to VDD +.3
V
TSTG
Storage Temperature range
-65 to +150
°C
TJ
Maximum junction temperature
+175
°C
TLS
Lead temperature (soldering 5 seconds)
+300
°C
ΘJC
Thermal resistance junction to case
20
°C/W
II
DC input current
±10
mA
PD
Maximum power dissipation
1
W
Note:
1. Stresses outside the listed absolute maximum ratings may cause permanent damage to the device. This is a stress rating only, functional operation of the device at
these or any other conditions beyond limits indicated in the operational sections is not recommended. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMIT
UNITS
VDD
Supply voltage
4.5 to 5.5
V
VIN
Input voltage any pin
0 to VDD
V
TC
Temperature range
-55 to + 125
°C
3
DC ELECTRICAL CHARACTERISTICS 7
(VDD = 5.0V ±10%; VSS = 0V 6, -55°C < TC < +125°C); Unless otherwise noted, Tc is per the temperature range ordered.
SYMBOL
PARAMETER
VT+
Schmitt Trigger, positive going threshold1
ACS
VT-
Schmitt Trigger, negative going threshold1
ACS
VH
Schmitt Trigger, typical range of hysteresis
CONDITION
VOL
VOH
IOL
MAX
UNIT
.7VDD
V
.3VDD
V
2
ACS
IIN
MIN
Input leakage current
ACS
VIN = VDD or VSS
Low-level output voltage 3
ACS
IOL = 100μA
High-level output voltage 3
ACS
IOH = -100μA
Output current (Sink)10
VIN=VDD or VSS
0.6
1.5
V
-1
1
μA
0.25
V
VDD - 0.25
V
12
mA
-12
mA
VOL=0.4V
IOH
Output current (Source)10
VIN=VDD or VSS
VOH=VDD - 0.4
IOZ
Three-state output leakage current
VO = VDD and VSS
-30
30
μA
IOS
Short-circuit output current 2, 4
ACS
VO = VDD and VSS
-300
300
mA
Ptotal
Power dissipation 2, 8, 9
CL = 50pF
2.0
mW/
MHz
IDDQ
Quiescent Supply Current
VDD = 5.5V
10
μA
CIN
Input capacitance 5
ƒ = 1MHz @ 0V
15
pF
Output capacitance 5
ƒ = 1MHz @ 0V
15
pF
COUT
4
Notes:
1. Functional tests are conducted in accordance with MIL-STD-883 with the following input test conditions: VIH = VIH(min) + 20%, - 0%; VIL = VIL(max) + 0%, 50%, as specified herein, for TTL, CMOS, or Schmitt compatible inputs. Devices may be tested using any input voltage within the above specified range, but are
guaranteed to VIH(min) and VIL(max).
2. Supplied as a design limit, but not guaranteed or tested.
3. Per MIL-PRF-38535, for current density ≤ 5.0E5 amps/cm2, the maximum product of load capacitance (per output buffer) times frequency should not exceed 3,765
pF/MHz.
4.Not more than one output may be shorted at a time for maximum duration of one second.
5.Capacitance measured for initial qualification and when design changes may affect the value. Capacitance is measured between the designated terminal and VSS at
frequency of 1MHz and a signal amplitude of 50mV rms maximum.
6. Maximum allowable relative shift equals 50mV.
7. All specifications valid for radiation dose ≤ 1E6 rads(Si).
8. Power does not include power contribution of any TTL output sink current.
9. Power dissipation specified per switching output.
10.Guaranteed based on characterization data, but not tested.
5
AC ELECTRICAL CHARACTERISTICS 2
(VDD = 5.0V ±10%; VSS = 0V 6, -55°C < TC < +125°C); Unless otherwise noted, Tc is per the temperature range ordered.
SYMBOL
PARAMETER
MINIMUM
MAXIMUM
UNIT
tPLH
Data to bus
2
15
ns
tPHL
Data to bus
2
15
ns
tPZL
G low to bus active
2
12
ns
tPZH
G low to bus active
2
12
ns
tPLZ
G high to bus three-state
2
15
ns
tPHZ
G high to bus three-state
2
15
ns
Notes:
1. Maximum allowable relative shift equals 50mV.
2. All specifications valid for radiation dose ≤ 1E6 rads(Si)
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PACKAGING
Side-Brazed Packages
7
FLATPACK PACKAGES
8
UT54ACS245S: SMD
5962 * ***** ** * * *
Lead Finish: (Notes 1 & 2)
A = Solder
C = Gold
X = Optional
Package Type:
X = 20-lead ceramic bottom-brazed dual-in-line Flatpack
C = 20-lead ceramic side-brazed dip
Class Designator:
Q = QML Class Q
V = QML Class V
Device Type:
01
Drawing Number:
96572 = UT54ACS245S
Total Dose: (Notes 3 & 4)
R = 1E5 rads(Si)
F = 3E5 rads(Si)
G = 5E5 rads(Si)
H = 1E6 rads(Si)
Notes:
1. Lead finish (A,C, or X) must be specified.
2. If an “X” is specified when ordering, part marking will match the lead finish and will be either “A” (solder) or “C” (gold).
3. Total dose radiation must be specified when ordering. QML Q and QML V not available without radiation hardening. For prototype inquiries, contact factory.
4. Device type 02 is only offered with a TID tolerance guarantee of 3E5 rads(Si) or 1E6 rads(Si) and is tested in accordance with MIL-STD-883 Test Method 1019
Condition A and section 3.11.2. Device type 03 is only offered with a TID tolerance guarantee of 1E5 rads(Si), 3E5 rads(Si), and 5E5 rads(Si), and is tested in
accordance with MIL-STD-883 Test Method 1019 Condition A.
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Aeroflex Colorado Springs - Datasheet Definition
Advanced Datasheet - Product In Development
Preliminary Datasheet - Shipping Prototype
Datasheet - Shipping QML & Reduced Hi-Rel
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reserves the right to make changes to any products and
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