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CT 3232M Low Power Driver / Receiver For MIL-STD-1553 & Macair
Features

1.5 Watt Total Hybrid Dissipation at 25% Transmitting Duty Cycle Monolithic Design Compatible with MIL-STD-1553A/B & Macair A3818, A5232, A5690 & A4905 Meets MIL-STD-1553B TTL Compatible Full Military (-55C to +125C) Temperature Range Driver / Receiver in a single Package for Space & Weight Savings Filtering on Receiver to Improve S/N Ratio of System Pin for Pin interchangeable with CT3231 Series CIRCUIT TECHNOLOGY Packaging - Hermetic Metal Plug-In or Flat Package www.aeroflex.com
* 24 Lead, 1.27" sq. max x .2" Ht Flat package * 24 Pin, 1.27" sq. max x .175" Ht Plug-In package
DRIVER DESCRIPTION
The CT3232 Driver section accepts complementary TTL Data at the input, and produces a 30 Volt nominal peak-to-peak differential signal across a 140 load at the output. When coupled to the Data Bus with a 1:1 transformer, isolated on the Data Bus side with two 55.0 fault isolation resistors, and loaded by two 70 terminations plus additional receivers, the Data Bus signal produced is 7.2 Volts nominal peak-to-peak. When both "DATA" and "DATA" inputs are held low or both are held high, the driver output becomes a high impedance and is "removed" from the line. In addition, an overriding "INHIBIT" input provides for removal of the Driver output from the line. A logic "1" applied to the "INHIBIT" takes priority over the condition of the data inputs and disables the Driver. See Driver Logic Waveforms, Figure 3. DATA and DATA inputs must be complementary waveforms, of 50% duty cycle average, with no gate delays between them.
RECEIVER DESCRIPTION
The CT3232 Receiver section accepts Bi-Phase Differential data at the input and produces two TTL signals at the output. The outputs are "DATA" and "DATA", and represent positive and negative excursions (respectively) of the input beyond a predetermined threshold. See Receiver Logic Waveforms, Figure 2. The positive and negative thresholds may be internally set by grounding the appropriate pins, or externally set with resistors. The pre-set internal thresholds will detect Data Bus signals exceeding 1Volt p-p and ignore signals less than 0.5Volt p-p when used with 1:1 transformer (See Figure 4 for a suitable transformer and typical connection). A low level at the STROBE input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5V is recommended. eroflex Circuit Technology - Data Bus Modules For The Future (c) SCDCT3232 REV A 6/27/02
+VCCRX INT. DATA THRES.
13 6
+ REG ( 10V )
V+
5
- LEVEL DET. + + LINEAR AMP - FILTER V+ - LEVEL DET. + - REG ( -10V ) V-
EXT. DATA THRES.
7
RX DATA OUT
RX DATA IN RX DATA IN
15 16
8
STROBE
10
RX DATA OUT
INT. DATA THRES. -VEERX GROUND A CASE
11 19 17 18
V-
12 9
EXT. DATA THRES. GROUND B
NOTE: GROUNDS A, B, & C MUST ALL BE EXTERNALLY GROUNDED
+5V
+VCCL
20
4
TX INHIBIT
+VCCTX
21
LINEAR AMP
2
TX DATA OUT
TX DATA IN
22 3
GROUND C
TX DATA IN
23
LINEAR AMP
1
TX DATA OUT
24
- VEETX
Figure 1 - CT3232 Functional Block Diagram and Pinouts
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Parameter
Supply Voltage, Pin 4 or 13 Supply Voltage, Pin 24 or 19 Supply Voltage, Pin 20 Logic Input Voltage, Pin 8, 21, 22, or 23 Receiver Differential Input, Pin 15 to Pin 16 Receiver Input Voltage, Pin 15 or Pin 16 Driver Peak Output Current, Pin 1 or Pin 2 Total Package Power Dissipation at (Ambient) TA = + 25C (Derate above TA = + 25C at 40 mW/C) Power Dissipation at Specified Case Temperatures Operating Case Temperature Range (TC) (See Figure 5 for limitations)
Range
-0.3 to +18.0 0.3 to -18.0 -0.3 to + 7.0 -0.3 to +5.5V 20 (40 Vp-p) 15 300 4.0 (Note 1) See Figure 5 -55 to +125
Units
Volts Volts Volts Volts Volts Volts mA Watts
C
Electrical Characteristics
Parameter / Condition Sym Min Typ Max Unit
Receiver
Power Supply Voltage Ranges VCCRX VEERX VCCL ICCRX IEERX ICCL f=1MHz ZIN VIDR VICR CMRR IIL IIH VIL VIH tSD +11.75 -11.75 +4.75 9K 20 10 40 2.0 25 30 35 20 +15.75 -15.75 +5.25 -4 400 0.7 V V V mA mA mA Vpeak Vpeak dB mA A V V ns
Supply Current Differential Input Impedance Differential Voltage Range Input Common Mode Voltage Range Common Mode Rejection Ratio (From Point A, Fig. 4) Strobe Characteristics (Logic "0" inhibits Output) "0" Input Current (V strobe = 0.5 V) "1" Input Current (V strobe = 2.7 V) "0" Input Voltage "1" Input Voltage Strobe Delay (turn-on or turn-off) Threshold Characteristics (Sinewave input, 100KHz to 1MHz) Note: Threshold voltages are referred to the Input Internal (Pin 6 & 11 grounded) External (Pin 6 & 11 open; threshold setting resistors from Pin 5 to ground & from Pin 12 to ground; RTH Max = 10K) Filter Characteristics (Pin 6 & 11 Grounded) (Sinewave input)
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VTH1 RTH/VTH1 VTH2 VTH3
0.6 1.0 3.0
4000 -
1.0 3.0 -
/Vp-p
Vp-p Vp-p
Vp-p
f = 2MHz f= 3MHz
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
Electrical Characteristics con't
Parameter / Condition Sym Min Typ Max Unit
Receiver con't
Output Characteristics, RX Data & Data "1" State (ISOURCE = -0.4 mA) Note 2 "0" State (ISINK = 4 mA) Note 2 Note: With Receiver input below threshold, both RX Data & RX Data outputs remain in "1" state. Delay (average) from differential input zero crossings to RX Data & RX Data output 50% points.
Note 1: Assumes unit in free air (natural convection cooling).
VOH VOL
2.5 -
3.3 -
0.5
V V
tDRX
-
290
450
ns
Driver
Power Supply Voltage Ranges (See Receiver Section for VCCL) Supply Current, "Standby" mode (See Receiver Section for ICCL) (TX Inhibit high; or TX Data & TX Data both high or both low) Supply Current transmitting at 1MHz into a 35 load at point A in Figure 4 (ICCL limits do not change with mode of operation or duty cycle) Input Characteristics, TX Data In or TX Data In "0" Input Current (VIN = 0.4 V) "1" Input Current (VIN = 2.7 V) "0" Input Voltage "1" Input VoltageV Inhibit Characteristic "0" Input Current (VIN = 0.4 V) "1" Input Current (VIN = 2.7 V) "0" Input Voltage "1" Input Voltage Delay from TX Inhibit (01) to inhibited output impedance Delay from TX Inhibit (10) to active output impedance Differential output noise, inhibit mode Differential output impedance (inhibited) at 1MHz Output Characteristics (Figure 3) Differential output level (140 ohm load) Differential Active output impedance at 1MHz Rise and Fall times (10% to 90% of p-p output) Output offset at point A in Fig. 4 (35 load) 2.5S after mid-bit crossing of the parity bit of the last word of a 660S message Delay from 50% point of TX Data or TX Data input to zero crossing of differential output Duty Cycle 25% 100% IEETX IILD IIHD VILD VIHD IILI IIHI VILI VIHII tDXOFF tDXON VNOI ZOI VO ZOA tR / tF VOS tDTX Note 3 2.0 2.0 10K 28 200 135 300 100 32 20 220 Note 2 -1.2 100 0.7 -0.8 50 0.7 450 350 10 35 10 300 75 350 mA mA a V V mA A V V ns ns mVPEAK Vp-p ns mVpeak ns VCCTX VEETXL ICCTXS IEETXS ICCX25 IEEX25 VCCTX +11.75 -11.75 Note 4 Note 3 Note 4 12 0 45 35 150 +15.75 -15.75 Note 2 1.0 Note 2 Note 2 Note 2 V V mA mA mA mA mA
Note 2: Maximum supply currents for driver and receiver combined are included in power and thermal data table.
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
Electrical Characteristics con't
Parameter / Condition Sym Min Typ Max Unit
Power and Thermal Data, Total Hybrid (Driver and Receiver)
Total Supply Current, "Standby" mode or transmitting at less than 1% duty cycle (e.g. 20S of transmission every 2mS or longer interval) Total Supply Current transmitting at 1MHz into a 35 load at point A in Figure 4 (ICCL limits do not change with mode of operation or duty cycle) Power Dissipation of most critical (hottest) device in hybrid during continuous transmission (100% duty cycle) Duty Cycle 25% 100% IEE100 Supply Voltage 12V 15V Note 3 165 180 mA ICCS IEES ICCL ICC25 IEE25 ICC100 Note 4 Note 4 Note 4 40 30 35 70 65 175 50 40 45 80 75 190 mA mA mA mA mA mA
PC12 PC15 OJC Note 5
Note 3 Note 3 -
300 450 80 -
400 600 100 100
mA mA C / W %
Thermal Resistance, junction-to-case, of most critical device Allowable transmitting duty cycle when case is held to +100C maximum Allowable transmitting duty cycle when case is held to +125C maximum Supply Voltage 12V 15V
Note 5 Note 5
-
-
80 55
% %
Note 3: Decreases linearly to zero at zero duty cycle. Note 4: Decreases linearly to applicable "Standby" value at zero duty cycle. Note 5: Based upon operating junction temperature of 160C for hottest device. For lower operating junction temperatures, reduce maximum duty cycle accordingly.
90% LINE-TO-LINE INPUT INPUT tr 10% DATA OUT DATA OUT NOTE: BOTH OUTPUTS HIGH WITH NO INPUT OR STROBE AT LOGIC "0" VIN(p-p)
OVERLAP VTH1(p-p) x INPUT tr 0.8 x VIN (p-p)
Figure 2 - Receiver Logic Waveforms
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
TX DATA IN BOTH HIGH OR BOTH LOW = INHIBIT TX DATA IN
tDTX
INHIBIT HI OR LOW
OVERRIDING INHIBIT
HI OR LOW
90%
tDXOFF
tDXON
tR
50% VO 10%
Figure 3 - Driver Logic Waveforms
BIPOLAR ZERO OUT 15 22 TX DATA IN TX DATA OUT (1 : 1) 55
1
CT BIPOLAR ONE OUT
22 17 22 23
TX DATA IN TX DATA OUT 2
Do not Connect
}
Taps at 1:.707 For Stub Coupling
A
For Direct Coupling
55
CT3232
BIPOLAR ONE OUT 7 10 RX DATA OUT RX DATA IN 15
TECHNITROL T1553-1 OR EQUIVALENT TRANSFORMER
BIPOLAR ZERO OUT
6
7
RX DATA OUT RX DATA IN 16
Aeroflex ACT15530 or Harris HD15530 CT3232
Figure 4 - Typical Input / Output Connections
4 POWER DISSIPATION - WATTS
3 15V 2 12V
% Duty Cycle =
Transmit Time Transmit & Receive Time
x 100
1
Note: Case Temperature must be held to +100C Maximum for 100% Duty Cycle. For Operation at Case Temperature of +125C, See "Power and Thermal Data".
10 20 30 40 50 60 70 80 DUTY CYCLE - PERCENT 90 100
0 0
Figure 5 - Typical Power Dissipation (Total Hybrid)
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
PLUG-IN PACKAGE
TOP VIEW 1.27 MAX 1.10
FLAT PACKAGE
TOP VIEW 1.27 MAX 24 .017 .002
24 1.27 MAX
13 1.27 MAX 1.10 Designator Pin 1 & ESD
1.10
12 Designator Pin 1 & ESD
.100 Typ 12 13 .400 MIN
2 sides
.175 MAX .009 .002 0.167 for Low Profile Flat Pack 0.200 for Std Flat Pack .080 .015
.24 MIN .018 DIA. .002 .100
Notes:1. Dimensions shown are in inches. 2. Pins are equally spaced at .100 .002 tolerance non-cumulative each row.
Figure 6 - Package Outline Drawings
Pin # 1 2 3 4 5 6 7 8 9 10 11 12
Function Tx Data Out Tx Data Out Ground C +VCCTX Ext. Data Threshold Int. Data Threshold Rx Data Out Strobe Ground B Rx Data Out Int. Data Threshold Ext. Data Threshold
Pin # 13 14 15 16 17 18 19 20 21 22 23 24
Function +VCCRX NC Rx Data In Rx Data In Ground A Case -VEERX +VCCL (+5V) Tx Inhibit Tx Data In Tx Data In -VEETX
Table I - CT3232 Pin Out Description (Plug-In & Flat Package)
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
CIRCUIT TECHNOLOGY
Ordering Information
Model Number CT3232M CT3232MFP Screening Military Temperature, -55C to +125C, Screened to the Individual Test Methods of MIL-STD-883 Package Plug-In Flat Package
Specifications subject to change without notice The information contained in this data sheet is believed to be accurate; however, Aeroflex Laboratories Incorporated assumes no responsibility for its use, and no license or rights are granted by implication or otherwise in connection therewith.
Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 www.aeroflex.com
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Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: (800) THE-1553 E-Mail: sales-act@aeroflex.com
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SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700

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