BEU8640-24 Battery Electronic Unit

Cell Management Electronics for Lithium-Ion Battery
BEU8640-24
Dual Redundant Balancing for 24-Cell Battery
Cell Voltage Monitoring and Telemetry
Reconditioning Load Control
Cell Bypass Relay Drivers
www.aeroflex.com/BEU
October 5, 2007
Description
The Aeroflex 8640-24 is a Lithium-Ion cell
balancing system. It controls the balancing
of one battery consisting of a series stack
of Lithium-Ion cells to ensure that each cell
is precisely charged to its proper level of
energy and to monitor each cell's
operational voltage.
The cell balancing circuitry uses a set of
bilateral DC-DC converters which tie each
cell of the battery to a common share bus.
Cell charge is distributed among the
multiple cells so that the charge of each
cell is automatically matched to the
average charge of the other cells.
Features
●
Cell Balancing to within ±5.0mV
●
Cell Voltage Monitoring Accuracy
±10.0mV (±20.0mV Space Mission Life)
●
Total Battery Voltage Monitoring Accuracy
±0.3% of Full Scale
●
Supports up to 24 Lithium-Ion battery cells
in series
●
Battery Drain Current at Balance
15mA Max for 24 cell stack
●
Discrete output lines for critical signaling
with user definable thresholds:
Overvoltage Protection 4.40V typ
Cell Voltage High
4.20V typ
Cell Voltage Low
3.20V typ
●
MIL-STD-1553B telemetry for data logging
and monitoring
●
Dual redundant control and cell balancing
SCD8640 Rev C 10/5/2007
Safety
The safety of Lithium-Ion battery technology
requires that extreme care be taken in the
provisions made for cell charging and cell
monitoring.
Precision measurements of each of the
individual cell voltages in the battery stack
and precise charge balancing to each
individual cell are critical.
The Aeroflex 8640-24 provides
necessary precision of control
monitoring to ensure that safety.
the
and
Discrete logic outputs are provided for
critical signaling, enabling the user to initiate
load shedding and/or to halt charging.
Low operating losses enable continuous
operation. Continuous balancing provides
maximum protection against any one cell
becoming overcharged.
CELL BALANCE
BOARD 1
CONTROL BOARD 1
OVP
A/D
12-BIT
HIGH
CELL
LOW
CELL
1553B
Channel A
12
MUX
SELECT
XFMR
7
XCVR
1553B
Channel B
ON
OFF
+30 VDC
VIN
Controller
XFMR
BALANCING
CIRCUIT
CLOCK
DRIVER
RELAY
POWER
SUPPLY
+12VDC
(ISOLATED)
+5VDC
-12VDC
MUX
BAL
CLK
MON
CLK
RECON LOAD
BALANCING
CIRCUIT
1
+
-
BALANCING
BALANCING
CIRCUIT
2
+
-
BALANCING
CIRCUIT
3
+
-
BALANCING
CIRCUIT
4
+
-
BALANCING
CIRCUIT
24
PRECISION
REFERENCE
4.000V
2 2 2
BATTERY
VOLTAGE
DIFF. AMPS
RELAY
BOARD
DRIVER
BATTERY
& RELAYS
BATTERY
HI AND LO
( 3x )
+12VDC
SHARE BUS
RECON FET SIGNALS
RELAY DRIVER CONTROL SIGNALS
RECON FET SIGNALS
CELL BALANCE
BOARD 2
CONTROL BOARD 2
OVP
A/D
12-BIT
HIGH
CELL
LOW
CELL
1553B
Channel A
12
ON
OFF
7
Controller
XFMR
BALANCING
CIRCUIT
CLOCK
DRIVER
RELAY
+30 VDC
POWER
SUPPLY
BALANCING
BALANCING
CIRCUIT
2
MUX
SELECT
XFMR
XCVR
1553B
Channel B
BALANCING
CIRCUIT
1
VIN
+12VDC
(ISOLATED)
+5VDC
-12VDC
MUX
BALANCING
CIRCUIT
3
BALANCING
CIRCUIT
4
BAL
CLK
MON
CLK
BALANCING
CIRCUIT
24
+
-
PRECISION
REFERENCE
4.000V
2 2 2
BATTERY
VOLTAGE
DIFF. AMPS
BATTERY
HI AND LO
( 3x )
+12VDC
SHARE BUS
RELAY DRIVER CONTROL SIGNALS
Block Diagram
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
2
8640-24 Operating Details
Battery Cell Balancing
Provides a dual redundant set of 24 individual continuous
balancing circuits.
Battery Cell Overvoltage Latch Output
The status of the OVP latch is provided by telemetry as
specified in Tables II, III & IV and also as a discrete output.
Maximum Cell Balancing Current Limit
Each cell is provided with a 1Amp fuse for overload interrupt
in the event of a shorted cell to protect the remaining cell
balance functionality.
Recovery from Cell Overvoltage Indication
The OVP latch is reset by a 1553B reset command or by
recycling the input power.
Highest Battery Cell Voltage Telemetry
Provides highest battery cell voltage telemetry as specified in
Tables I & IV.
Cell Balancing Accuracy
When connected to a battery, the 8640-24 provides
balancing currents into each of the battery's cells. The
directions and the magnitudes of the individual currents are
proportional to the deviations of the cell voltages from the
average cell voltage. The transfer ratio of voltage to current is
1.0 Ohm nominal and is satisfied for cell voltages of up to
4.2V.
Lowest Battery Cell Voltage Telemetry
Provides lowest battery cell voltage telemetry as specified in
Tables I & IV.
Test Points
Provides test points for total battery voltage, low cell
indicator and high cell indicator. Access to the total battery
voltage is provided to permit pre-charging before connection
to the battery.
Battery Cell Current Drawn in Off State
In the off state, the differential mode battery cell current
drawn by each cell balancing circuit is less than 50μA.
Battery Cell Voltage Monitoring
Measures cell voltages for up to 24 cells.
4V and 0V References for Calibration
Provides 4V and 0V references for cell voltage telemetry
calibration.
Battery and Cell Protection
Incorporates overvoltage protection (OVP) circuits. These
circuits monitor all of the battery cell voltages and only
register the highest of all cell voltages monitored. When a
cell voltage threshold of 4.40V is reached, the protection
circuit output changes state and latches within 50mS.
Cell Relay Bypass
Incorporates one bypass relay for each cell to remove a
malfunctioned cell from causing interference with the
operation of the remaining cells.
Reconditioning Load Switching
Discretionary load switching is provided for reconditioning
(RECON).
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
3
MIL-STD-1553B Telemetry & Commands
Analog or bi-level telemetry can be requested from either
the primary or the redundant controller and reported over
the dual redundant 1553B interface with the RT addresses
configurable at the J1 and J4 connectors.
Bi-Level Telemetry
Bi-level telemetry can be requested on sub-addresses 18, 19
or 22.
First a 1553B receive command with one data word as
defined in Table II, which specifies the telemetry item being
requested, must be issued. After a minimum delay of 1.2ms,
the data can be retrieved by sending a 1553B transmit
command for one data word on the same sub-address on
which the request was initiated.
Analog Telemetry
Each analog telemetry item can be requested individually on
sub-addresses 18, 19 or 22.
First a 1553B receive command with one data word as
defined in Table I, which specifies the telemetry item being
requested, must be issued. After a minimum delay of 1.2ms,
the data can be retrieved by sending a 1553B transmit
command for one data word on the same sub-address on
which the request was initiated.
Table II – Bi-level Telemetry
Item
The 12-bit data reply is left justified in the 16-bit 1553B data
word with the four LSBs set to "0".
Table I – Analog Telemetry
Item
Telemetry Title
Telemetry Title
Status
Reply
Bit
1st Data Word
of 1553B
Receive
Command
(Hex)
1
RECON Switch Status
1 = Closed
D15
0C80
2
Discharge Inhibit Status
1 = Inhibit
D14
0C80
Telemetry Reply
Scale
1st Data Word of
1553B Receive
Command (Hex)
3
Overvoltage Latch Status
1 = Set
D13
0C80
4
Bypass Dev. 1 Arm Status
1 = Armed
D15
0C83
1
4V Reference
-0.40V to 4.89V
0800
5
Bypass Dev. 2 Arm Status
1 = Armed
D14
0C83
2
0V Reference
-0.40V to 4.89V
0803
6
Bypass Dev. 3 Arm Status
1 = Armed
D13
0C83
3
Total Battery Voltage 1
0V to 61.44V
0805
7
Bypass Dev. 4 Arm Status
1 = Armed
D12
0C83
4
Total Battery Voltage 2
0V to 61.44V
0806
8
Bypass Dev. 5 Arm Status
1 = Armed
D11
0C83
5
Total Battery Voltage 3
0V to 61.44V
0809
9
Bypass Dev. 6 Arm Status
1 = Armed
D10
0C83
6
Share Bus Voltage
0V to 5.12V
080A
10
Bypass Dev. 7 Arm Status
1 = Armed
D9
0C83
7
Bypass Device Driver Power
0V to 51.2V
080C
11
Bypass Dev. 8 Arm Status
1 = Armed
D8
0C83
8
Cell 1 Voltage
0V to 5.12V
0811
12
Bypass Dev. 9 Arm Status
1 = Armed
D15
0C85
9
Cell 2 Voltage
0V to 5.12V
0812
13
Bypass Dev. 10 Arm Status
1 = Armed
D14
0C85
10
Cell 3 Voltage
0V to 5.12V
0814
14
Bypass Dev. 11 Arm Status
1 = Armed
D13
0C85
11
Cell 4 Voltage
0V to 5.12V
0817
15
Bypass Dev. 12 Arm Status
1 = Armed
D12
0C85
12
Cell 5 Voltage
0V to 5.12V
0818
16
Bypass Dev. 13 Arm Status
1 = Armed
D11
0C85
13
Cell 6 Voltage
0V to 5.12V
081B
17
Bypass Dev. 14 Arm Status
1 = Armed
D10
0C85
14
Cell 7 Voltage
0V to 5.12V
081D
18
Bypass Dev. 15 Arm Status
1 = Armed
D9
0C85
15
Cell 8 Voltage
0V to 5.12V
081E
19
Bypass Dev. 16 Arm Status
1 = Armed
D8
0C85
16
Cell 9 Voltage
0V to 5.12V
0821
20
Bypass Dev. 17 Arm Status
1 = Armed
D15
0C86
17
Cell 10 Voltage
0V to 5.12V
0822
21
Bypass Dev. 18 Arm Status
1 = Armed
D14
0C86
18
Cell 11 Voltage
0V to 5.12V
0824
22
Bypass Dev. 19 Arm Status
1 = Armed
D13
0C86
19
Cell 12 Voltage
0V to 5.12V
0827
23
Bypass Dev. 20 Arm Status
1 = Armed
D12
0C86
20
Cell 13 Voltage
0V to 5.12V
0828
24
Bypass Dev. 21 Arm Status
1 = Armed
D11
0C86
21
Cell 14 Voltage
0V to 5.12V
082B
22
Cell 15 Voltage
0V to 5.12V
082D
23
Cell 16 Voltage
0V to 5.12V
082E
24
Cell 17 Voltage
0V to 5.12V
0830
0833
25
Cell 18 Voltage
0V to 5.12V
26
Cell 19 Voltage
0V to 5.12V
0835
27
Cell 20 Voltage
0V to 5.12V
0836
28
Cell 21 Voltage
0V to 5.12V
0839
29
Cell 22 Voltage
0V to 5.12V
083A
30
Cell 23 Voltage
0V to 5.12V
083C
31
Cell 24 Voltage
0V to 5.12V
083F
32
Lowest Cell Voltage
0V to 5.12V
0871
33
Highest Cell Voltage
0V to 5.12V
0872
25
Bypass Dev. 22 Arm Status
1 = Armed
D10
0C86
26
Bypass Dev. 23 Arm Status
1 = Armed
D9
0C86
27
Bypass Dev. 24 Arm Status
1 = Armed
D8
0C86
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
4
32-Word Telemetry
To reduce data bus bandwidth usage, the 8640-24 supports
a 32-word telemetry request on sub-address 20 as defined
in Table III.
8-Word Telemetry
To reduce data bus bandwidth usage, the 8640-24 supports
an 8-word telemetry request on sub-address 24 as defined
in Table IV.
First a 1553B receive command with one data word of
AAAA(Hex) must be issued. After a minimum delay of
1.2ms, the data can be retrieved by sending a 1553B
transmit command for 32 data words on sub-address 20.
First a 1553B receive command with one data word of
5555(Hex) must be issued. After a minimum delay of 1.2ms,
the data can be retrieved by sending a 1553B transmit
command for 8 data words on sub-address 24.
Reply word 31 is a modulo-16 message count. This counter
increments by one for each valid telemetry request.
The 12-bit analog data reply is left justified in the 16-bit
1553B data word with the four LSBs set to "0"..
Reply word 8 is a modulo-16 message count. This counter
increments by one for each valid telemetry request.
The 12-bit analog data reply is left justified in the 16-bit
1553B data word with the four LSBs set to "0".
Table III – 32-Word Telemetry
Table IV – 8-Word Telemetry
Item
Telemetry Title
Telemetry Reply
Type
Word
Reply Bits
Item
Telemetry Title
RECON Switch Status
Telemetry
Type
Reply
Word
Reply Bits
Bi-level
1
D15
1
4V Reference
Analog
1
D(15:4)
1
2
Total Battery Voltage 1
Analog
2
D(15:4)
2
Discharge Inhibit Status
Bi-level
1
D14
Overvoltage Latch Status
Bi-level
1
D13
3
Total Battery Voltage 2
Analog
3
D(15:4)
3
4
Total Battery Voltage 3
Analog
4
D(15:4)
4
Bypass Dev. 1 Arm Status
Bi-level
2
D15
Bypass Dev. 2 Arm Status
Bi-level
2
D14
5
Share Bus Voltage
Analog
5
D(15:4)
5
6
Master Bypass Power Status
Analog
6
D(15:4)
6
Bypass Dev. 3 Arm Status
Bi-level
2
D13
D(15:4)
7
Bypass Dev. 4 Arm Status
Bi-level
2
D12
D(15:4)
8
Bypass Dev. 5 Arm Status
Bi-level
2
D11
Bypass Dev. 6 Arm Status
Bi-level
2
D10
D9
7
8
Cell 1 Voltage
Cell 2 Voltage
Analog
Analog
7
8
9
Cell 3 Voltage
Analog
9
D(15:4)
9
10
Cell 4 Voltage
Analog
10
D(15:4)
10
Bypass Dev. 7 Arm Status
Bi-level
2
D(15:4)
11
Bypass Dev. 8 Arm Status
Bi-level
2
D8
Bypass Dev. 9 Arm Status
Bi-level
3
D15
Bypass Dev. 10 Arm Status
Bi-level
3
D14
11
Cell 5 Voltage
Analog
11
12
Cell 6 Voltage
Analog
12
D(15:4)
12
13
Cell 7 Voltage
Analog
13
D(15:4)
13
14
Cell 8 Voltage
Analog
14
D(15:4)
14
Bypass Dev. 11 Arm Status
Bi-level
3
D13
D(15:4)
15
Bypass Dev. 12 Arm Status
Bi-level
3
D12
D(15:4)
16
Bypass Dev. 13 Arm Status
Bi-level
3
D11
Bypass Dev. 14 Arm Status
Bi-level
3
D10
D9
15
16
Cell 9 Voltage
Cell 10 Voltage
Analog
Analog
15
16
17
Cell 11 Voltage
Analog
17
D(15:4)
17
18
Cell 12 Voltage
Analog
18
D(15:4)
18
Bypass Dev. 15 Arm Status
Bi-level
3
D(15:4)
19
Bypass Dev. 16 Arm Status
Bi-level
3
D8
Bypass Dev. 17 Arm Status
Bi-level
4
D15
19
Cell 13 Voltage
Analog
19
20
Cell 14 Voltage
Analog
20
D(15:4)
20
21
Cell 15 Voltage
Analog
21
D(15:4)
21
Bypass Dev. 18 Arm Status
Bi-level
4
D14
22
Cell 16 Voltage
Analog
22
D(15:4)
22
Bypass Dev. 19 Arm Status
Bi-level
4
D13
D(15:4)
23
Bypass Dev. 20 Arm Status
Bi-level
4
D12
D(15:4)
24
Bypass Dev. 21 Arm Status
Bi-level
4
D11
Bypass Dev. 22 Arm Status
Bi-level
4
D10
D9
23
24
Cell 17 Voltage
Cell 18 Voltage
Analog
Analog
23
24
25
Cell 19 Voltage
Analog
25
D(15:4)
25
26
Cell 20 Voltage
Analog
26
D(15:4)
26
Bypass Dev. 23 Arm Status
Bi-level
4
D(15:4)
27
Bypass Dev. 24 Arm Status
Bi-level
4
D8
0V Reference
Analog
5
D(15:4)
Lowest Cell Voltage
Analog
6
D(15:4)
27
Cell 21 Voltage
Analog
27
28
Cell 22 Voltage
Analog
28
D(15:4)
28
29
Cell 23 Voltage
Analog
29
D(15:4)
29
30
Cell 24 Voltage
Analog
30
D(15:4)
30
Highest Cell Voltage
Analog
7
D(15:4)
31
Message Count
Analog
8
D(15:0)
31
Message Count
Analog
31
D(15:0)
D15
32
RECON Switch Status
Bi-level
32
33
Discharge Inhibit Status
Bi-level
32
D14
34
Overvoltage Latch Status
Bi-level
32
D13
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
5
Additional Commands
Data Load Commands
1553B receive commands consist of 2 data words to the
sub-address specified in Table V. Only the first data word is
used.
Table V – Commands
Item
Function Title
1st Data Word
of 1553B
Sub-Address
Receive
Command
(Hex)
1
RECON SW1 & 2 Disconnect
13
0200
2
RECON SW1 Connect
13
0080
3
RECON SW2 Connect
13
0100
4
Bypass Commands (multiple)
14
as req’d
5
Reset OVP Latch
15
0400
Telemetry Frame Sync Command
1553B broadcast command on sub-address 17 (any data
word) commands the 8640-24 to refresh its RT address.
Remote Terminal State Command
1553B transmit command on sub-address 21 for one data
word. The reply word will be 4000(Hex), to indicate that the
unit is ready to accept another command or 5000(Hex), to
indicate that the unit is busy and cannot accept another
command.
1553B Data Wrap Around
Sub-address 30 is dedicated to data wrap around as
specified in MIL-STD-1553B.
Supported Mode Codes
The 8640-24 supports the 1553B Mode Codes in Table VI.
Table VI – 1553B Mode Codes
Mode Code Name
Mode Code Number
Transmit Status Word
2
Transmitter Shutdown
4
Override Transmitter Shutdown
5
Reset Remote Terminal
8
1553B Status Flag Bits
The 8640-24 supports the following 1553B status flag bits:
1. Message Error bit
2. Broadcast Message Received bit
All other status bits are set to "0".
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
6
Connector P1 for Cell Balance Board 1
Connector P3 for Cell Balance Board 2
26 Pin Subminiature-D Plug
Cell Sense
Connector J2 for Control Board 1
Connector J5 for Control Board 2
Triaxial
1553B Bus A
CHA_DATA_H
Pin
#
Function Name
Pin
#
Function Name
CHA_DATA_L
SHIELD
23
CELL_12+
17
CELL_24+
9
CELL_11+
7
CELL_23+
3
CELL_10+
14
CELL_22+
19
CELL_9+
1
CELL_21+
10
CELL_8+
20
CELL_20+
13
CELL_7+
12
CELL_19+
16
CELL_6+
18
CELL_18+
26
CELL_5+
8
CELL_17+
5
CELL_4+
4
CELL_16+
CHB_DATA_H
2
CELL_3+
21
CELL_15+
CHB_DATA_L
15
CELL_2+
22
CELL_14+
SHIELD
24
CELL_1+
6
CELL_13+
11
CELL_1-
25
CELL_13-
Connector J3 for Control Board 1
Connector J6 for Control Board 2
Triaxial
1553B Bus B
Connector J1 for Control Board 1
Connector J4 for Control Board 2
51 Pin Micro-D Receptacle
Control & Test Points
Pin
#
1
Function
Pin
#
Function
Pin
#
Function
30V_RTN
18
V_BAT_3
35
2
NC_ISOLATION
19
NC_ISOLATION
36
V_BAT_2
NC_ISOLATION
3
NC_ISOLATION
20
+30V_POWER
37
NC_ISOLATION
4
NC_ISOLATION
21
+30V_POWER
38
NC_ISOLATION
5
30V_RTN
22
NC_ISOLATION
39
SPARE
6
NC_ISOLATION
23
NC_ISOLATION
40
CHASSIS GND
7
CHASSIS GND
24
CHASSIS GND
41
CELL_CHG_24
8
CELL_CHG_12
25
LOW_CELL
42
SPARE
9
SPARE
26
DISCHARGE_INH
43
BEU_ON_CMD_1
10
BEU_OFF_CMD_2
27
BAL_ON_1
44
BEU_ON_CMD_2
11
BEU_OFF_CMD_1
28
BAL_ON_2
45
HIGH_CELL
12
RTA_2
29
RTA_0
46
RTA_4
13
RTA_GND
30
RTA_GND
47
RTA_GND
14
RTA_GND
31
RTA_GND
48
RTA_GND
15
RTA_1
32
RTA_3
49
RTPTY
16
OV_PROT
33
V_BAT_TP
50
V_BAT_RTN1
17
V_BAT_RTN3
34
V_BAT_RTN2
51
V_BAT_1
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
7
Connector P2
78 Pin Subminiature-D Plug
Bypass Relay Driver
Pin
#
Function
Pin
#
Function
Pin
#
Function
1
KDH1
27
RECON_LOAD_RTN (Side1)
53
KDL6
2
KDH5
28
RECON_LOAD_RTN (Side2)
54
KDL13
3
KDH9
29
ISO_1MEG
55
KDL10
4
NC_ISOLATION
30
KDL23
56
ISO_1MEG
5
30V_RTN
31
KDL2
57
KDH16
6
NC_ISOLATION
32
KDL22
58
KDH20
7
CHASSIS GND
33
KDL9
59
KDH24
8
CELL_CHG_12
34
KDL19
60
KDH4
9
SPARE
35
KDL4
61
KDH8
10
KDL1
36
ISO_1MEG
62
KDH12
11
KDL8
37
KDH13
63
RELAY_CURRENT_MON
12
KDL17
38
KDH17
64
ISO_1MEG
13
KDL3
39
KDH21
65
ISO_1MEG
14
KDL16
40
KDH2
66
ISO_1MEG
15
KDL11
41
KDH6
67
RECON_LOAD_RTN (Side1)
16
KDL20
42
KDH10
68
RECON_LOAD_RTN (Side2)
17
ISO_1MEG
43
RECON_LOAD (Side 1)
69
ISO_1MEG
KDL24
KDL14
18
KDH15
44
RECON_LOAD (Side 1)
70
19
KDH19
45
RECON_LOAD (Side2)
71
20
KDH23
46
RECON_LOAD (Side2)
72
KDL21
21
KDH3
47
RECON_LOAD_RTN (Side1)
73
KDL12
22
KDH7
48
RECON_LOAD_RTN (Side2)
74
KDL5
23
KDH11
49
ISO_1MEG
75
ISO_1MEG
24
ISO_1MEG
50
KDL18
76
KDH14
25
RECON_LOAD (Side 1)
51
KDL7
77
KDH18
26
RECON_LOAD (Side2)
52
KDL15
78
KDH22
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
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3-D View
NOTES - UNLESS OTHERWISE SPECIFIED
1. DIMENSIONS ARE IN INCHES.
TOLERANCE: .XXX ±.010
.XX = .03
J3
5.25
J6
J2
J5
5.25
P1
P2
P3
2x 4.010
J1
2.500
2x 3.250
J4
2x 2.525
2x 1.502
.250
5x .250
5x 11.000
2x .402
10x .200 THRU
2x 1.000
2x 2.423
2x 3.442
2x 1.000
11.500
Outline
Aeroflex Plainview
SCD8640 Rev C 10/5/2007
9
Standard Configuration
Power Dissipation
33 Watts (30 Watts from 30V, 3.0 Watts from battery at balance)
Operating Base Plate Temperature
-34°C to +71°C
Storage Temperature
-34°C to +71°C
Dimensions
11.5'' L x 5.250'' W x 5.250'' H
Weight
8.20 lbs (3.73 kg)
ORDERING INFORMATION
MODEL NUMBER
SCREENING
BEU8640-24-S
High Reliablilty Space Grade
BEU8640-24
Commerical Flow, -34°C to +71°C operating base plate temperature
EXPORT CONTROL:
EXPORT WARNING:
This product is controlled for export under the International Traffic in
Arms Regulations (ITAR). A license from the U.S. Department of
State is required prior to the export of this product from the United
States.
Aeroflex’s military and space products are controlled for export under
the International Traffic in Arms Regulations (ITAR) and may not be
sold or proposed or offered for sale to certain countries. (See ITAR
126.1 for complete information.)
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www.aeroflex.com
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Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liability is assumed as a result of use of
this product. No patent licenses are implied.
Our passion for performance is defined by three
attributes represented by these three icons:
solution-minded, performance-driven and customer-focused
SCD8640 Rev C 10/5/2007
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