Standard Products CT3231M Low Power Driver / Receiver for MIL-STD-1553B & SAE-AS15531 www.aeroflex.com/Avionics March 15, 2005 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ±12V to ±15V/+5V DC power supply operation 1.5Watt total hybrid dissipation at 25% transmitting duty cycle Monolithic construction TTL compatible Full military (-55°C to +125°C) temperature range Driver / Receiver in a single Package for Space & Weight Savings Filtering on Receiver to improve S/N ratio of system Designed for commercial, industrial and aerospace applications MIL-PRF-38534 compliant devices available Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer Packaging – hermetic metal plug-in or flat package 24 Lead, 1.27" sq. max x .200"H Flat package 24 Pin, 1.27" sq. max x .175"H Plug-In package DRIVER DESCRIPTION The CT3231 Driver section accepts complementary TTL Data at the input, and produces a 30 Volt nominal peak-to-peak differential signal across a 140Ω load at the output. When coupled to the Data Bus with a 1:1 transformer, isolated on the Data Bus side with two 55.0Ω fault isolation resistors, and loaded by two 70Ω 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. It is recommended that those inputs be driven from a “D” type flip-flop. RECEIVER DESCRIPTION The CT3231 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 2KΩ pull-up to +5V is recommended. SCDCT3231 Rev B +VCCRX 13 INT. DATA THRES. 6 RX DATA IN RX DATA IN + REG ( ≈ 10V ) – LEVEL DET. + + 16 LINEAR AMP – 11 -VEERX 19 GROUND A 17 CASE 18 +VCCL 20 TX INHIBIT 21 FILTER TX DATA IN EXT. DATA THRES. 7 RX DATA OUT 8 STROBE V+ – LEVEL DET. + – REG ( ≈ -10V ) 10 RX DATA OUT 12 EXT. DATA THRES. V– 9 GROUND B 4 +VCCTX 2 TX DATA OUT 3 GROUND C 1 TX DATA OUT NOTE: GROUNDS A, B, & C MUST ALL BE EXTERNALLY GROUNDED +5V LINEAR AMP TX DATA IN 5 V– 15 INT. DATA THRES. V+ 22 23 LINEAR AMP 24 - VEETX FIGURE 1 – CT3231 Functional Block Diagram and Pinouts SCDCT3231 Rev B 2 ABSOLUTE MAXIMUM RATINGS PARAMETER RANGE UNITS Positive Supply Voltage, Pin 4 or 13 -0.3 to +18.0 Volts Negative Supply Voltage, Pin 24 or 19 0.3 to -18.0 Volts Logic Voltage, Pin 20 -0.3 to + 7.0 Volts Logic Input Voltage, Pin 8, 21, 22, or 23 -0.3 to +5.5 Volts ±20 (40Vp-p) Volts Receiver Input Voltage, Pin 15 or Pin 16 ±15 Volts Driver Peak Output Current, Pin 1 or Pin 2 ±300 mA 4.0 (Note 1) Watts Receiver Differential Input, Pin 15 to Pin 16 Total Package Power Dissipation at (Ambient) TA = + 25°C (Derate above TA = + 25°C at 40 mW/°C) Power Dissipation at Specified Case Temperatures See Figure 5 Operating Case Temperature Range (TC) (See Figure 5 for limitations) - 55 to + 125 °C ELECTRICAL CHARACTERISTICS RECEIVER SECTION Parameter / Condition Sym Min Typ Max Unit Power Supply Voltage Ranges VCCRX VEERX VCCL +11.75 -11.75 +4.75 - +15.75 -15.75 +5.25 V V V Supply Current ICCRX IEERX ICCL - 25 30 35 - mA mA mA RIN ZIN 6K 4K - - Ω Ω Differential Voltage Range VIDR ±20 - - Vpeak Input Common Mode Voltage Range VICR ±10 - - Vpeak CMRR 40 - - dB IIL IIH VIL VIH tSD 2.0 - 6 -4 400 0.7 - mA µA V V ns VTH1 RTH /VTH1 0.6 - 4000 0.9 - Ω/ Vp-p VTH2 VTH3 0.8 4.2 - 1.5 8.5 Vp-p Vp-p Differential Input Impedance DC f = 1MHz Common Mode Rejection Ratio (From Point A, Figure 4) Strobe Characteristics (Logic “0” inhibits Output) “0” Input Current (VSTROBE = 0.5 V) “1” Input Current (VSTROBE = 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 = 10KΩ) Filter Characteristics (Pin 6 & 11 Grounded) (Sinewave input) f = 2MHz f = 4MHz SCDCT3231 Rev B 3 Vp-p ELECTRICAL CHARACTERISTICS con’t RECEIVER SECTION Parameter / Condition Sym Min Typ Max Unit VOH VOL 2.5 - 3.3 - 0.5 V V tDRX - 190 450 ns Sym Min Typ Max Unit Power Supply Voltage Ranges (See Receiver Section for VCCL) VCCTX VEETXL +11.75 -11.75 - +15.75 -15.75 V V Supply Current, “Standby” mode (See Receiver Section for ICCL) (TX Inhibit high; or TX Data & TX Data both high or both low) ICCTXS IEETXS - 12 0 Note 2 1.0 mA mA Supply Current transmitting at 1MHz into a 35Ω load at point A in Figure 4 Duty Cycle ICCX25 Note 4 45 Note 2 mA 25% IEEX25 Note 3 35 Note 2 mA Note: ICCL limits do not change with mode of operation or duty cycle 100% VCCTX Note 4 150 Note 2 mA IEETX Note 3 135 Note 2 mA IILD IIHD VILD VIHD 2.0 - -1.2 100 0.7 - mA µa V V IILI IIHI VILI VIHII tDXOFF tDXON VNOI ZOI 2.0 10K 300 100 - -0.8 50 0.7 400 250 10 - mA µA V V ns ns mVPEAK VO ZOA tR / tF VOS 26 100 - 30 4 150 ±20 35 300 ±75 Vp-p ns mVpeak tDTX - 100 250 ns Output Characteristics, RX Data & RX 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). DRIVER SECTION Parameter / Condition 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 Voltage 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 (0→1) to inhibited output impedance Delay from TX Inhibit (1→0) 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 (35Ω load) 2.5µS after mid-bit crossing of the parity bit of the last word of a 660µS message Delay from 50% point of TX Data or TX Data input to zero crossing of differential output Note 2: Maximum supply currents for driver and receiver combined are included in power and thermal data table. SCDCT3231 Rev B 4 Ω Ω ELECTRICAL CHARACTERISTICS con’t POWER AND THERMAL DATA, TOTAL HYBRID (DRIVER AND RECEIVER) SECTION Parameter / Condition Sym Min Typ Max Unit Total Supply Current, “Standby” mode or transmitting at less than 1% duty cycle (e.g. 20µS of transmission every 2mS or longer interval) ICCS IEES ICCL - 40 30 35 50 40 45 mA mA mA Total Supply Current transmitting at 1MHz into a 35Ω load at point A in Figure 4 Duty Cycle ICC25 Note 4 70 80 mA 25% IEE25 Note 4 65 75 mA Note: Iccl limits do not change with mode of operation or duty cycle 100% ICC100 Note 4 175 190 mA IEE100 Note 3 165 180 mA PC12 PC15 Note 3 Note 3 300 450 400 600 mW mW ØJC - 80 100 °C / W Note 5 - - 100 % Note 5 Note 5 - - 80 55 % % Power Dissipation of most critical (hottest) device in hybrid during continuous transmission (100% duty cycle) Supply Voltage ±12V ±15V Thermal Resistance, junction-to-case, of most critical device Allowable transmitting duty cycle when case is held to +100°C maximum Allowable transmitting duty cycle when case is held to +125°C maximum Supply Voltage ±12V ±15V 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 160°C for hottest device. For lower operating junction temperatures, reduce maximum duty cycle accordingly. 90% LINE-TO-LINE INPUT INPUT tr VIN(p-p) 10% DATA OUT DATA OUT NOTE: BOTH OUTPUTS HIGH WITH NO INPUT OR STROBE AT LOGIC "0" OVERLAP ≈ VTH1(p-p) x INPUT tr 0.8 x VIN (p-p) FIGURE 2 – Receiver Logic Waveforms SCDCT3231 Rev B 5 TX DATA IN BOTH HIGH OR BOTH LOW = INHIBIT TX DATA IN tDTX INHIBIT OVERRIDING INHIBIT HI OR LOW HI OR LOW tDXON tDXOFF 90% tR 50% VO 10% FIGURE 3 – Driver Logic Waveforms BIPOLAR ZERO OUT 15 22 TX DATA IN TX DATA OUT 55Ω (1 : 1) 1 CT BIPOLAR ONE OUT 22 17 22 23 Do not Connect TX DATA IN Aeroflex ACT15530 or CT3231 TX DATA OUT BIPOLAR ZERO OUT 7 6 10 7 A 55Ω 2 TECHNITROL T1553-1 OR EQUIVALENT TRANSFORMER Harris HD15530 BIPOLAR ONE OUT } Taps at 1:.707 For Stub Coupling RX DATA OUT RX DATA IN 15 RX DATA IN 16 RX DATA OUT Aeroflex ACT15530 or Harris HD15530 CT3231 FIGURE 4 – Typical Input / Output Connections POWER DISSIPATION – WATTS 4 3 % Duty Cycle = ±15V x 100 Transmit & Receive Time ±12V 2 Note: Case Temperature must be held to +100°C Maximum for 100% Duty Cycle. for Operation at Case Temperature of +125°C, See "Power and Thermal Data". 1 0 0 Transmit Time 10 20 30 40 50 60 70 80 DUTY CYCLE – PERCENT 90 100 FIGURE 5 – Typical Power Dissipation (Total Hybrid) SCDCT3231 Rev B 6 For Direct Coupling PLUG-IN PACKAGE FLAT PACKAGE TOP VIEW 1.27 MAX TOP VIEW 1.27 MAX 1.10 .017 ±.002 24 24 13 1.27 MAX Designator Pin 1 & ESD 1.27 MAX 1.10 1.10 .100 Typ 12 Designator Pin 1 & ESD 12 13 .400 MIN 2 sides .175 MAX .009 ±.002 .24 MIN .018 DIA. ±.002 0.167 for Low Profile Flat Pack 0.200 for Std Flat Pack .100 .080 ±.015 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 # Function Pin # Function 1 Tx Data Out 13 +VCCRX 2 Tx Data Out 14 NC 3 Ground C 15 Rx Data In 4 +VCCTX 16 Rx Data In 5 Ext. Data Threshold 17 Ground A 6 Int. Data Threshold 18 Case 7 Rx Data Out 19 -VEERX 8 Strobe 20 +VCCL (+5V) 9 Ground B 21 Tx Inhibit 10 Rx Data Out 22 Tx Data In 11 Int. Data Threshold 23 Tx Data In 12 Ext. Data Threshold 24 -VEETX TABLE I – CT3231 Pin Out Description (Plug-In & Flat Package) SCDCT3231 Rev B 7 ORDERING INFORMATION Model Number CT3231M Screening Package Military Temperature, -55°C to +125°C, Screened to the Individual Test Methods of MIL-STD-883 Plug-In CT3231MFP Flat Package PLAINVIEW, NEW YORK Toll Free: 800-THE-1553 Fax: 516-694-6715 INTERNATIONAL Tel: 805-778-9229 Fax: 805-778-1980 NORTHEAST Tel: 603-888-3975 Fax: 603-888-4585 SE AND MID-ATLANTIC Tel: 321-951-4164 Fax: 321-951-4254 WEST COAST Tel: 949-362-2260 Fax: 949-362-2266 CENTRAL Tel: 719-594-8017 Fax: 719-594-8468 www.aeroflex.com [email protected] 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 SCDCT3231 Rev B 8