1
UT54ACS162245S
RadHard Schmitt CMOS 16-bit Bidirectional MultiPurpose
Low Voltage Transceiver
Datasheet
March 2003
FEATURES
• Voltage translation
- 3.3V bus to 2.5V bus
- 2.5V bus to 3.3V bus
• Cold sparing all pins
• 0.25µ Commercial RadHardTM CMOS
- Total dose: 300Krad(Si) and 1Mrad(Si)
- Single Event Latchup immune
• High speed, low power consumption
• Schmitt trigger inputs to filter noisy signals
• Cold and Warm Spare - all outputs
• Available QML Q or V processes
• Standard Microcircuit Drawing 5962-02543
• Package:
- 48-lead flatpack, 25 mi l pi tch (.390 x .640)
DESCRIPTION
The 16-bit wide UT54ACS162245S MultiPurpose low voltage
transceiver is built using Aeroflex UTMC’s Commercial
RadHardTM epitaxial CMOS technology and is ideal for space
applications. This high speed, low power UT54ACS162245S
low voltage transceiver is designed to perform multiple func-
tions including: asynchronous two-way communication,
Schmitt input buffering, voltage translation, warm and cold spar-
ing. With VDD equal to zero volts, the UT54ACS162245 S out-
puts and inputs present a minimum impedance of 1MΩ making
it ideal for "cold spare" applications. Balanced outputs and low
"on" output impedance make the UT54ACS162245S well suited
for driving high capacitance loads and low impedance back-
planes. The UT54ACS162245S enables system designers to in-
terface 2.5 volt CMOS compatible components with 3.3 volt
CMOS components. For voltage translation, the A port interfac-
es with the 2.5 volt bus; the B port interfaces with the 3.3 volt
bus. The direction control (DIRx) controls the direction of data
flow. The output enable (OEx) overrides the direction control
and disables both ports. These signals can be driven from either
port A or B. The direction and output enable controls operate
these devices as either two independent 8-bit transceivers or one
16-bit transceiver.
LOGIC SYMBOL
PIN DESCRIPTION
Pin Names Description
OEx Output Enable Input (Active Low)
DIRx Direction Control Inputs
xAx Side A Inputs or 3-State Outputs (2.5V Port)
xBx Side B Inputs or 3-State Outputs (3.3V Port)
(48)
OE1
G2
(47)
1A1
(46)
1A2 (44)
(2) 1B1
(5)
(3) 1B2
1A3 (43)
1A4 (41)
1A5 (40)
1A6
1B3
(9) 1B6
(8) 1B5
(6) 1B4
(38)
1A7 (37)
1A8 (12) 1B8
(11) 1B7
(1)
DIR1 1EN1 (BA)
1EN2 (AB)
11 12
(25)
OE2G1 (24) DIR2
21 22
(36)
2A1 2B1
(13)
(35)
2A2 (33)
2A3 (32)
2A4 (30)
2A5 (29)
2A6 (27)
2A7 (26)
2A8
(16) 2B2
2B3
(20) 2B6
(19) 2B5
(17) 2B4
(23) 2B8
(22) 2B7
(14)
2EN1 (BA)
2EN2 (AB)
2
PINOUTS
POWER TABLE
When VDD2 is at 2.5 volts, either 2.5 or 3.3 volts CMOS logic
levels can be applied to all control inputs . For proper op eration
connect power to all VDD and ground all VSS pins (i.e., no float-
ing VDD or VSS input pins). Tie unused inputs to VSS. Always
insure VDD1 > VDD2 during operation of the part.
FUNCTION TABLE
COLD/WARM SPARE FUNCTION
The device will place all outputs into a high-impedance state if
either VDD supply is taken to zero volts (IWS, warm spare), or
if both VDD supplies are set to zero volts (ICS, cold spare).
DEVICE POWER UP FUNCTION
The device will place all outputs into a high-impedance during
power-up. The high impedance state is maintained for a time
period approximat ely equal to the rise time of VDD1.
Port B Port A OPERATION
3.3 Volts 2.5 Volts Voltage Translator
3.3 Volts 3.3 Volts Non Translating
2.5 Volts 2.5 Volts Non Translating
1
2
3
4
5
7
6
48
47
46
45
44
42
43
DIR1
1B1
1B2
VSS
1B3
1B4
VDD1
OE1
1A1
1A2
VSS
1A3
VDD2
841
1B5 1A5
1A4
940
1B6 1A6
10 39
VSS VSS
48-Lead Flatpack
Top View
1B7
1B8
2B1
2B2
VSS
2B3
2B4
VDD1
2B5
2B6
11
12
13
14
15
17
16
18
19
20
VSS
2B7
2B8
DIR2
21
22
23
24
38
37
36
35
34
32
33
1A7
1A8
2A1
2A2
VSS
2A4
31 VDD2
2A3
30 2A5
29 2A6
28 VSS
27 2A7
26 2A8
25 OE2
ENABLE
OExDIRECTION
DIRx OPERATION
L L B Data To A Bus
L H A Data To B Bus
HX Isolation
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LOGIC DIAGRAM
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A8
DIR1 (1)
(47)
(48)
(2)
(46)
(3)
(44)
(5)
(43)
(6)
(41)
(8)
(40)
(9)
(38)
(11)
(37)
(12)
1B1
1B2
1B3
1B6
1B5
1B4
1B8
1B7
OE1
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A8
DIR2 (24)
(36)
(25)
(13)
(35)
(14)
(33)
(16)
(32)
(17)
(30)
(19)
(29)
(20)
(27)
(22)
(26)
(23)
2B1
2B2
2B3
2B6
2B5
2B4
2B8
2B7
OE2
2.5V PORT
3.3 V PORT
2.5V PORT
3.3 V PORT
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RADIATION HARDNESS SPECIFICATIONS 1
Notes:
1. Logic will not latchup during radiation exposure within the limits defined in the table.
2. Not tested, inherent to CMOS technology.
ABSOLUTE MAXIMUM RATINGS1
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 in dicated in the operational sections is not recommended. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability and performance.
2. For Cold Spare mode (VDD1=VSS, VDD2=VSS), VI/O may be -0.3V to the maximum recommended operating level of VDD1 +0.3V.
3. Maximum junction temperature may be increased to +175oC during burn-in and life test.
DUAL SUPPLY OPERATING CONDITIONS
PARAMETER LIMIT UNITS
Total Dose 1.0E5 rad(Si)
SEL Latchup >113 MeV-cm2/mg
Neutron Fluence (Note 2) 1.0E14 n/cm2
SYMBOL PARAMETER LIMIT (Mil only) UNITS
VI/O (Note 2) Voltage any pin -.3 to VDD1 +.3 V
VDD1 Supply voltage -0.3 to 4.0 V
VDD2 Supply voltage -0.3 to 4.0 V
TSTG Storage Temperature range -65 to +150 °C
TJ (Note 3) Maximum junction temperature +150 °C
ΘJC Thermal resistance junction to case 20 °C/W
IIDC input current ±10 mA
PDMaximum power dissipation 1 W
SYMBOL PARAMETER LIMIT UNITS
VDD1 Supply voltag e 2.3 to 3.6 V
VDD2 Supply voltag e 2.3 to 3.6 V
VIN Input voltage any pin 0 to VDD1 V
TCTemperature range -55 to + 125 °C
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DC ELECTRICAL CHARACTERISTICS 1
( -55°C < TC < +125°C)
SYMBOL PARAMETER CONDITION MIN MAX UNIT
VT+Schmitt Tr igger , positive going threshold2 VDD from 2.3 to 3.6 .7VDD V
VT-Schmitt T rigger , negative going threshold2VDD from 2.3 to 3.6 .3VDD V
VH1 Schmitt Trigger range of hysteresis9 V
DD from 3.0 to 3.6 0.5 V
VH2 Schmitt Trigger range of hysteresis9 VDD from 2.3 to 2.7 0.4 V
IIN Input leakage current9 VDD from 2.7 to 3.6
VIN = VDD or VSS
-1 3 µA
IOZ Three-state output leakage current9 VDD from 2.7 to 3.6
VIN = VDD or VSS
-1 3 µA
ICS Cold sparing input leakage current3,11 VIN = 3.6
VDD = VSS
-5 5 µA
IWS Warm sparing input leakage current3,11 VIN = VSS or VDD, VDD1 = 0,
VDD2 = VDD or VDD1 = VDD, VDD2 = 0
-5 5 µA
IOS1 Short-circuit output current 5, 10 VO = VDD or VSS
VDD from 3.0 to 3.6
-200 200 mA
IOS2 Short-circuit output current 5, 10 VO = VDD or VSS
VDD from 2.3 to 2.7
-100 100 mA
VOL1 Low-level output voltage9 IOL= 8mA
IOL= 100µA
VDD = 3.0
0.4
0.2
V
VOL2 Low-level output voltage9 IOL= 8mA
IOL= 100µA
VDD = 2.3
0.4
0.2
V
VOH1 High-level output voltage9IOH= -8mA
IOH= -100µA
VDD = 3.0
VDD - 0.7
VDD - 0.2
V
VOH2 High-level output voltage9IOH= -8mA
IOH= -100µA
VDD = 2.3
VDD - 0.7
VDD - 0.2
V
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DC ELECTRICAL CHARACTERISTICS 1
( -55°C < TC < +125°C)
Notes:
1. All specifications valid for radiation dose ≤ 1E5 rad(Si) per MIL-STD-883, Method 1019.
2. 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 rang e, but are
guaranteed to VIH(min) and VIL(max).
3. All combinations of OEx and DIRx
4. Guaranteed by characterization.
5. Not more than one output may be shorted at a time for maximum du ration of one second.
6. Power does not include po wer co ntr ibu tio n of any CMOS output sink curr ent.
7. Power dissipation specified per switching output.
8.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.
9.Guaranteed; tested on a sample of pins per device.
10. Supplied as a design limit, but not guaranteed or tested.
11. Zero Volts is defined as 0.0 Volts +/- 0.25Volts.
12. VDD1 and VDD2 Voltage rise is monotonic.
13. Rise time measured from VDD @ Zero Volts to VDD @ greater than 2.3 V.
SYMBOL PARAMETER CONDITION MIN MAX UNIT
Ptotal1 Power dissipatio n 4,6,7 CL = 40pF 6.2 mW/
MHz
VDD from 3.0V to 3.6V
Ptotal2 Power dissipatio n 4,6,7 CL = 40pF 3MHz
VDD from 2.3V to 2.7V
IDD Standby Supply Current
VDD1 or VDD2
VIN = VDD or VSS
VDD = 3.6V
OE = VDD
Pre-Rad 25oC10 µA
OE = VDD
Pre-Rad -55oC to +125oC475 µA
OE = VDD
Post-Rad 25oC15 mA
CIN Input Capacitance8f = 1MHz @ 0V 15 pF
VDD from 2.3V to 3.6V
Cout Output Capacitance8f = 1MHz @ 0V 15 pF
VDD from 2.3V to 3.6V
POR VDD1 & VDD2 Power-On4,13 VDD1 or VDD2 Zero Volt Offset 250 m V
VDD1 and VDD2 Rise-Time12 500 mS
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AC ELECTRICAL CHARACTERISTICS1 (Port B = 3.3 Volt, Port A = 2.5 Volt)
(VDD1 = 3.0V to 3.6V; VDD2 = 2.3V to 2.7V, -55°C < TC < +125°C)
Notes:
1. All specifications valid for radiation dose ≤ 1E5 rad(Si) per MIL-STD-883, Method 101 9.
2. DIRx to bus times are guaranteed by design, but not tested. OEx to bus times are tested
3. Output skew is defined as a comparison of any two output transitions high-to-low vs. high-to-low and low-to-high vs. low-to-high
SYMBOL PARAMETER MINIMUM MAXIMUM UNIT
tPLH Propagation delay Data to Bus 2 10 ns
tPHL Propagation delay Data to Bus 2 10 ns
tPZL Output enable time OEx to Bus 2 12 ns
tPZH Output enable time OEx to Bus 2 12 ns
tPLZ Output disable time OEx to Bus high impedance 2 15 ns
tPHZ Output disable time OEx to Bus high impedance 2 15 ns
tPZL2Output enable time DIRx to Bus 2 12 ns
tPZH2Output enable time DIRx to Bus 2 1 2 ns
tPLZ2Output disable time DIRx to Bus hi gh impedance 2 15 ns
tPHZ2Output disable time DIRx to Bus high impedance 2 15 ns
tSLH3
tSHL3
Skew between outputs (40pF +/- 10 pF on each output)
Skew between outputs (40pF +/- 10 pF on each output)
0
0
900
900
ps
ps
tPLZ
tPZH
tPZL
tPHL
tPHZ
Propagation Delay
Input
Output
VDD
VDD/2
0V
tPLH VOH
VOL
VDD/2
Control Input
3.3V Output
Normally Low
Enable Disable Times
3.3V Output
Normally High
VDD
VDD/2
0V
VDD/2
VDD/2
.8VDD
.2VDD
VDD/2+0.2
VDD/2-0.2 .2VDD + .2V
.8VDD - .2V
tPLZ
tPZH
tPZL
tPHZ
2.5V Output
Normally Low
2.5V Output
Normally High
VDD/2
VDD/2
.7VDD
.2VDD
VDD/2+0.2
VDD/2-0.2 .2VDD + .2V
.7VDD - .2V
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AC ELECTRICAL CHARACTERISTICS1 (Port A = Port B, 3.3 Volt Operat i on)
(VDD1 = 3.0 to 3.6V; VDD2 = 3.0V to 3.6V, -55°C < TC < +125°C)
Notes:
1. All specifications val id fo r radiation dose ≤ 1E5 rad(Si) per MIL-STD-88 3, Method 1019.
2. DIRx to bus times are guaranteed by design, but not tested. OEx to bus times are tested
3. Output skew is defined as a comparison of any two output transitions high-to-low vs. high-to-low and low-to-high vs. low-to-high
SYMBOL PARAMETER MINIMUM MAXIMUM UNIT
tPLH Propagation delay Data to Bus 2 7.5 ns
tPHL Propagation delay Data to Bus 2 7.5 ns
tPZL Output enable time OEx to Bus 2 10 ns
tPZH Output enable time OEx to Bus 2 10 ns
tPLZ Output disable time OEx to Bus high impedance 2 12 ns
tPHZ Output disable time OEx to Bus high impedance 2 12 ns
tPZL2Output enable time DIRx to Bus 2 10 ns
tPZH2Output enable time DIRx to Bus 2 10 ns
tPLZ2Output disable time DIRx to Bus high impedance 2 12 ns
tPHZ2Output disable time DIRx to Bus high impedance 2 12 ns
tSLH3
tSHL3
Skew between outputs (40pF +/- 10 pF on each output)
Skew between outputs (40pF +/- 10 pF on each output)
0
0
900
900
ps
ps
tPLZ
tPZH
tPZL
tPHZ
Control Input
3.3V Output
Normally Low
Enable Disable Times
3.3V Output
Normally High
VDD
VDD/2
0V
VDD/2
VDD/2
.8VDD
.2VDD
VDD/2+0.2
VDD/2-0.2 .2VDD + .2V
.8VDD - .2V
tPHL
Propagation Delay
Input
Output
VDD
VDD/2
0V
tPLH VOH
VOL
VDD/2
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AC ELECTRICAL CHARACTERISTICS1 (P ort A = Port B, 2.5 Volt Operation)
(VDD1 = 2.3V TO 2.7V; VDD2 = 2.3V to 2.7V, -55°C < TC < +125°C)
Notes:
1. All specifications valid for radiation dose ≤ 1E5 rad(Si) per MIL-STD-883, Method 101 9.
2. DIRx to bus times are guaranteed by design, but not tested. OEx to bus times are tested
3. Output skew is defined as a comparison of any two output transitions high-to-low vs. high-to-low and low-to-high vs. low-to-high
SYMBOL PARAMETER MINIMUM MAXIMUM UNIT
tPLH Propagation delay Data to Bus 2 10 ns
tPHL Propagation delay Data to Bus 2 10 ns
tPZL Output enable time OEx to Bus 2 12 ns
tPZH Output enable time OEx to Bus 2 12 ns
tPLZ Output disable time OEx to Bus high impedance 2 15 ns
tPHZ Output disable time OEx to Bus high impedance 2 15 ns
tPZL2Output enable time DIRx to Bus 2 12 ns
tPZH2Output enable time DIRx to Bus 2 1 2 ns
tPLZ2Output disable time DIRx to Bus hi gh impedance 2 15 ns
tPHZ2Output disable time DIRx to Bus high impedance 2 15 ns
tSLH3
tSHL3
Skew between outputs (40pF +/- 10 pF on each output)
Skew between outputs (40pF +/- 10 pF on each output)
0
0
900
900
ps
ps
tPLZ
tPZH
tPZL
tPHL
tPHZ
Propagation Delay
Input
Output
VDD
VDD/2
0V
tPLH
VOH
VOL
VDD/2
Control Input
2.5V Output
Normally Low
Enable Disable Times
2.5V Output
Normally High
VDD
VDD/2
0V
VDD/2
VDD/2
.7VDD
.2VDD
VDD/2+0.2
VDD/2-0.2 .2VDD + .2V
.7VDD - .2V
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PACKAGE
Figure 1. 48-Lead Flatpack
1. All exposed metalized areas are gold plated over electroplated nickel per MIL-PRF-38535.
2. The lid is electrically connected to VSS.
3. Lead finishes are in accordance with MIL-PRF-38535.
4. Lead position and colanarity are not measured.
5. ID mark symbol is vendor option .
6. With solder, increase maximum by 0.003.
64
5
6
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ORDERING INFORMATION
UT54ACS162245S: SMD
Lead Finish:
(C) = Gold
(A) = Solder
Case Outline:
(X) = 48 lead FP
Class Designator:
(Q) = Class Q
(V) = Class V
Device Type
(01) = 16-bit MultiPurpose Low Voltage Transceiver
Drawing Number: 02543
Total Dose:
(R) = 1E5 rad(Si)
(F) = 3E5 rad(Si)
(G) = 5E5 rad(Si)
(H) = 1E6 rad(Si)
Federal Stock Class Designator
5962 R 02543 01 * * *
Notes:
1. Total dose radiation must be specified when ordering. QML Q and QML V not available without radiation hardening.
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UT54ACS162245S
U
T54 *** ****** * * *
Lead Finish:
(C) = Gold
(A) = Solder
Screening:
(C) = Mil Temp
(P) = Prototype
Package Type:
(U) = 48-lead FP
Part Number:
(16225SLV) = 16-bit MultiPurpose Low Voltage Transceiver
I/O Type:
(ACS)= CMOS compatible I/O Level
UTMC Core Part Number
Notes:
1. Military T emperature Range flow per UTMC Manufacturing Flows Document. Devices are tested -55C, room temp, and 125C. Radiatio n neither tested
nor guaranteed.
2. Prototype flow per UTMC Manufacturing Flows Document Tested at 25C only. Lead finish is gold only.
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