THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS CT1487M/CT1589M OCTOBER 1991 3122-1.2 CT1487M/CT1589M MIL-STD-1553 LOW POWER SINGLE AND DUAL TRANSCEIVERS FEATURES GENERAL DESCRIPTION ■ Available in ±15V (CT1487M) and ±12 V (CT1589M) versions The CT1487M/CT1589M family of single and dual transceivers is a second generation series incorporating monolithic bipolar devices for improved reliability and producibility. For thermal considerations, the drive stage transistors are “off” the bipolar array. Input/output signals are compatible with both MIL-STD-1553A and B systems. ■ AC interstage coupling prevents static burnout ■ Receiver filtered to improve S/N ratio of system ■ Dissipates only 1.3 watt total at 25% transmitting duty cycle (dual unit - 1.8 watts total). 100% duty cycle permissible at 125°C case temperature DETAILED DESCRIPTION ■ 20 mV typical output offset RECEIVER DESCRIPTION ■ Meets MIL-STL-1553A/B The Receiver section accepts bi-phase differential data at the input and produces two TTL signals at the output. The outputs are RX DATA OUT and RX DATA OUT and represent positive and negative excursions, respectively, of the input beyond a predetermined threshold. See Figure 2 for receiver logic waveforms. ■ Available to Standard Military Drawings (see Ordering Information) ■ 24 pin double dip package or flat pack for single unit ■ 36 pin double dip package or flat pack for dual unit ■ TTL compatible Note: All data shown is for a single transceiver unless otherwise noted. Dual transceivers are two completely independent units in a common package. The positive and negative thresholds are designed for optimum word error rate. The receiver begins to detect Data Bus signals (1 MHz, sinusoidal) that exceed 0.9 volt nominal peak-to-peak when used with the specified transformer. See Figure 4 for typical input/output connections. If the RECEIVER STROBE input is LOW, the RX DATA OUT and RX DATA OUT are inhibited. If unused, a 2Kohm pullup to +5V is recommended. Note: See ORDERING INFORMATION for units with inverted outputs. (Pg 7) Figure 1: Functional Diagram, CT1487M 1 CT1487M/CT1589M DRIVER DESCRIPTION The Driver section accepts complementary TTL data at the input. When coupled to the Data Bus with the specified transformer (isolated on the Data Bus side with 55-ohm fault isolation resistors and loaded by two 70-ohm terminations plus additional receivers), the Data Bus signal produced is 6.8 volts nominal peak-to-peak (at point A, Figure 4). When both TX DATA IN and TX DATA IN inputs are both held LOW or held HIGH, the driver output becomes a high impedance and is removed from the line. In addition, an overriding TX INHIBIT input takes priority over the condition of the data inputs and disables the driver. See Figure 3 for the driver logic waveforms. TX DATA IN and TX DATA IN inputs must be complementary waveforms of 50% average duty cycle and with less than 15 ns skew between them. CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS Power supply voltage (V cc) CT1487 −0.3 to +18.0V CT1589 −0.3 to + 18.0V Power supply voltage (V ee) +0.3 to −18.0V +0.3 to −18.0V Power supply voltage (V ccl) −0.3 to +7.0V −0.3 to +7.0V −0.3 to +5.5V −0.3 to +5.5V ± 20 V (40 V p-p) ± 20 V (40 V p-p) Receiver input voltage (RX DATA IN or RX DATA IN) ± 15 V ± 15 V Driver output current (TX DATA OUT or TD DATA OUT) +200 mA +300 mA Transmission duty cycle at T c = 125°C Operating case temperature range (Tc) 100% −55 to +125°C 100% −55 to +125°C Logic input voltage (RECEIVER STROBE, INHIBIT, TX DATA IN, TX DATA IN) Receiver differential input (RX DATA IN, RX DATA IN) POWER AND THERMAL DATA, TOTAL HYBRID (DRIVER AND RECEIVER) CT1487M PARAMETER/CONDITION CT1589M SYMBOL MIN TYP MAX MIN TYP MAX UNIT Vcc Vee Vccl 14.25 -14.25 4.5 15 -15 5 15.75 -15.75 5.5 11.4 -11.4 4.5 12 -12 5 12.6 -12.6 5.5 V V V Power dissipation of most critical (hottest) device in hybrid during continuous transmission (100% duty cycle) Pc Note 1 350 500 Note1 350 500 mW Thermal resistance, most critical device Øjc 50 50 °C/W Junction to case temperature rise of most critical device at 100% duty cycle transmission Tjc 25 25 °C Power supply voltages Total supply current “standby” mode, or transmitting at less than 1% duty cycle (e.g. 20 µs of transmission every 2ms or longer interval) Icc I ee I ccl Note 2 Note 2 S* 15 25 32 Total supply current transmitting at 1MHz into a DUTY CYCLE 35-ohm load at point A in Figure 4 25% Icc25 Note 3 55 70 Icc100 Note 3 185 200 235 260 Note 3 100% D* 30 50 64 S* 22 35 45 D* 44 70 90 Note 2 Note 2 S* 15 25 32 75 100 Note 3 70 85 * S = single unit, D = dual unit (one unit transmitting) Notes: 2 1. Decreases linearly to zero at zero duty cycle. 2. I ee and Iccl limits do not change with mode of operation or duty cycle. 3. Decreases linearly to applicable “standby” value at zero duty cycle. D* 30 50 64 S* 22 35 45 D* 44 70 90 mA mA mA 95 120 mA 224 240 290 315 mA CT1487M/CT1589M ELECTRICAL CHARACTERISTICS, RECEIVER SECTION (See Figure 2) PARAMETER/CONDITION SYMBOL MIN TYP MAX UNIT Differential input impedance DC to 1MHz Zin 9K ohms Differential voltage range Vidr ± 20V Vpeak Input common mode voltage range Vicr ± 10V Vpeak CMRR 40 dB INPUT CHARACTERISTICS Common mode rejection ratio (from point A, Figure 4) STROBE characteristics (Logic "0" inhibits output) "0" input current (vs = 0.4 V) lil -1 mA "1" input current (Vs = 2.7 V) lil 40 µA "0" input voltage Vil 0.7 V "1" input voltage Vih 2 Threshold characteristics (sine wave at 1MHz) NOTE: Threshold voltages refer to point A, Figure 4. Vth1 0.8 1.1 Vp-p Filter characteristics 2 MHz Vth2 1.5 8 Vp-p (sine wave input) 3 MHz Vth3 5 "1" state (lsource = 400 µA) Voh 2.5 "0" state (lsink = 4 mA) NOTE: With receiver input below threshold both RX DATA OUT and RX DATA OUT remain in "0" state. Voh Delay (average) from differential input zero crossings to RX DATA OUT and RX DATA OUT output 50% points tDRX V Vp-p OUTPUT CHARACTERISTICS 3.4 0.5 340 450 ns Figure 2: Receiver Logic Waveforms (for Inverted Data Output, see Ordering Information) 3 CT1487M/CT1589M ELECTRICAL CHARACTERISTICS, DRIVER SECTION (See Figure 3) PARAMETER/CONDITION SYMBOL MIN TYP MAX UNIT INPUT CHARACTERISTICS "0" input current (Vin = 0.4 V) lil −1 mA "1" input current (Vin = 2.7 V) lih 80 µA "0" input voltage Vil 0.7 V "1" input voltage Vih 2 V Delay from TX INHIBIT (0 → 1) to inhibited output impedance tDXOFF 150 225 ns Delay from TX INHIBIT (1 → 0) to active output impedance t DXON 100 150 ns 10 mVp-p Differential output noise Vnoi Differential output impedance (inhibited) at 1 MHz Zoi 8K Differential output level at point B, Figure 4 (145-ohm load) Vo 26 28 35 Vp-p Rise and fall times (10%–90% of p-p output) tr 100 160 300 ns ohms OUTPUT CHARACTERISTICS Output offset at point A in Figure 4 (35-ohm load) 2.5 µs after mid-bit crossing of parity bit of last word of a 660 µs message Vos ±20 ±75 mV peak Delay from 50% point of TX DATA IN or TX DATA IN to zero crossing of differential output tDTX 100 200 ns Figure 3: Driver Logic Waveforms 4 CT1487M/CT1589M Figure 4: Typical Input/Output Connections Figure 5: Typical Internal Power Dissipation (Total Hybrid) 5 CT1487M/CT1589M Figure 6: Mechanical Outline for the “MP” Package 6 Figure 7: Mechanical Outline and Pinouts (Single Unit) CT1487M/CT1589M Figure 8: Mechanical Outline and Pinouts (Dual Unit) 7 CT1487M/CT1589M ORDERING INFORMATION Some of these devices are available to Standard Military Drawings. Contact Customer Services at one of the addresses below for more information. “Inverted Receiver Data Output” refers to the logic state of RX DATA OUT and RX DATA OUT when the bus is quiet. All part numbers with the “I” suffix produce logic “1” at the receiver outputs for quiet bus. CT1487M – ±15 V Single Unit Plug-in Package CT1589M – ±12 V Single Unit Plug-in Package CT1487MP – ±15 V Single Unit Plug-in Package CT1589MP – ±12 V Single Unit Plug-in Package CT1487MFP – ±15 V Single Unit Flat Pack CT1589MFP – ±12 V Single Unit Flat Pack CT1487MI – ±15 V Single Unit Plug-in Package, Inverted Receiver Data Outputs CT1589MI – ±12 V Single Unit Plug-in Package, Inverted Receiver Data Outputs CT1487MIFP – ±15 V Single Unit Flat Pack, Inverted Receiver Data Outputs CT1589MIFP – ±12 V Single Unit Flat Pack, Inverted Receiver Data Outputs CT1487D – ±15 V Dual Unit Plug-in Package CT1589D – ±12 V Dual Unit Plug-in Package CT1487DI – ±15 V Dual Unit Plug-in Package, Inverted Receiver Data Outputs CT1589DI – ±12 V Dual Unit Plug-in Package, Inverted Receiver Data Outputs CT1487DFP – ±15 V Dual Unit Flat Pack CT1589DFP – ±12 V Dual Unit Flat Pack CT1487DIFP – ±15 V Dual Unit Flat Pack, Inverted Receiver Data Outputs CT1589DIFP – ±12 V Dual Unit Flat Pack, Inverted Receiver Data Outputs HEADQUARTERS OPERATIONS CUSTOMER SERVICE CENTRES GEC PLESSEY SEMICONDUCTORS Cheney Manor, Swindon, Wiltshire, SN2 2QW, United Kingdom. Tel: (0793) 518000 Fax: (0793) 518411 • FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Fax: (1) 64 46 06 07 • GERMANY Munich Tel: (089) 3609 06-0 Fax: (089) 3609 06-55 • ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993 • JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510 • NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 7023 • SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872 • SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36 • TAIWAN, ROC Taipei Tel: 886 2 5461260 Fax: 886 2 7190260 • UK, EIRE, DENMARK, FINLAND & NORWAY Swindon, UK Tel: (0793) 518510 GEC PLESSEY SEMICONDUCTORS P.O. Box 660017, 1500 Green Hills Road, Scotts Valley, California 95067-0017, United States of America. Tel: (408) 438 2900 Fax: (408) 438 5576 Fax: (0793) 518582 These are supported by Agents and Distributors in major countries world-wide. © GEC Plessey Semiconductors 1991 Publication No. 3122-1.2 October 1991 TECHNICAL DOCUMENTATION - NOT FOR RESALE. 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