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CT1496-2 Dataheets PDF



Part Number CT1496-2
Manufacturers Aeroflex Circuit Technology
Logo Aeroflex Circuit Technology
Description CT1496-2 MIL-STD-1397 Type E 10MHz Low Level Serial Manchester 32 Bit Encoder
Datasheet CT1496-2 DatasheetCT1496-2 Datasheet (PDF)

CT1496-2 MIL-STD-1397 Type E 10MHz Low Level Serial Manchester 32 Bit Encoder Features • • • • • • • • • • Implements Type E protocol Operates with a single +5V supply Single clock input (40MHz) Selectable 4, 34, 35 bit operation Selectable Parity Includes parallel to serial converter Self-test outputs for BITE applications External encoder inhibit Bipolar Construction Use with CT1469-2 (transceiver) & CT1508-2 (4 bit decoder) to provide a complete low level serial interface CIRCUIT TECHNOLOGY w.

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CT1496-2 MIL-STD-1397 Type E 10MHz Low Level Serial Manchester 32 Bit Encoder Features • • • • • • • • • • Implements Type E protocol Operates with a single +5V supply Single clock input (40MHz) Selectable 4, 34, 35 bit operation Selectable Parity Includes parallel to serial converter Self-test outputs for BITE applications External encoder inhibit Bipolar Construction Use with CT1469-2 (transceiver) & CT1508-2 (4 bit decoder) to provide a complete low level serial interface CIRCUIT TECHNOLOGY www.aeroflex.com AE R O F LE X LA C ISO 9001 E RTIFIED B S I NC . General Description CT1496-2 is a hybrid microcircuit which incorporates a low level serial Manchester encoder in a single package. The encoder accepts 32 bit parallel data and outputs a 35 bit Manchester encoded TTL NRZ serial stream (34 bit transmission if parity option is not selected). Preceding the 32 data bits are a synchronization and word identifier bit and a parity bit trails the data (parity is optional and may be disabled). A self-test feature is implementd allowing the user to verify transmit patterns. Aeroflex Circuit Technology is a 80,000 square foot MIL-PRF-38534 certified facility in Plainview, N.Y. Sync Bit LSB 32-Bit Word Register MSB Sys Clr / Load Sync Data C/I Bit4 Vcc Timing Section TX Data TX Data Data ST Data ST WI Bit External Encoder Inhibit 32-Bit Parallel Word Input 2-Bit Register Mux Manchester Encoder DeMux SIS/SOS Input +5V Parity Select Encoder Enable Transmit / Self-Test 4-Bit SIS/SOS Select 34-Bit Select 35-Bit Select 40MHz Clock TTL GND 4-Bit Register Controller Parity Generator TX Inhibit Block Diagram eroflex Circuit Technology – Data Bus Modules For The Future © SCDCT1496 REV A 3/22/00 Aeroflex Circuit Technology 2 SCDCT1496 REV A 3/22/00 Plainview NY (516) 694-6700 40MHz Parallel Input Data (DBN) Bit 1 Bit 2 Bit 3 OUTPUT LOGIC STATE TRUTH TABLE CONDITIONS OUTPUT STATES TX INH (29) TX/ST (37) DATA (39) DATA (38) DATAst (33) DATAst (32) LOW LOW HIGH LOW HIGH LOW HIGH HIGH HIGH HIGH (DBn) HIGH HIGH HIGH (DBn) LOW LOW (DBn) LOW LOW LOW (DBn) LOW Bit 3 System Clear / Load Encoder Enable TX Inhibit Transmit / Self Test DATA DATA DATAst DATAst T1 T2 PW1 T3 PW2 T4 HIGH T5 T6 T7 PW3 T8 T9 PW5 Output Data Bit 1 Example =1 Output Data Bit 2 Example =1 Output Data Bit 3 Example =0 PW6 PW4 T11 T10 T10 T10 T10 Output Data Bit N Example =1 Figure 1 – Encoder Timing Waveforms Absolute Maximum Ratings Parameter Supply Voltage 1/ Logic Input Voltage Logic Input Current Power Dissipation 2/ Storage Temperature Range Operating Case Temperature Range Rating +7.0 -1.2 to +5.5 -10 (low logic) 3.25 -65 to +125 -55 to +100 Units V V mA W °C °C 1/ Power sequencing shall not be required. 2/ For Logic output short circuits, line to ground logic outputs shall withstand currents not exceeding 100mA for one second for one output at a time. DC Electrical Characteristics (VDD = 5V ±10%, TC = -55 °C to +100°C, unless otherwise specified) SYMBOL PARAMETER LIMIT DATA 1/, DATA 1/, DATAst 2/ & DATAst 2/ VOH VOL TX INHIBIT VOH VOL Logic High Output Voltage 3/, 4/ Logic Low Output Voltage 4/ 2.5V min @ I OH = -150µA 0.5V max @ IOL = 5mA Logic High Output Voltage 3/, 4/ Logic Low Output Voltage 4/ 2.5V min @ I OH = -50µA 0.5V max @ IOL = 2mA 40MHz, Encoder Enable & External Encoder Inhibit IIH IIL Logic High Input Current Logic Low Input Current 3/ 100µA max @ VIH = 2.5V -4mA max @ VIL = 0.5V Parity Select, 34 Bit Select, 35 Bit Select & Sys Clear / Load IIH IIL Logic High Input Current Logic Low Input Current 3/ 50µA max @ VIH = 2.5V -2mA max @ VIL = 0.5V Transmit / Self Test & 4 Bit SIS / SOS Select IIH IIL Logic High Input Current Logic Low Input Current 3/ 150µA max @ VIH = 2.5V -6mA max @ VIL = 0.5V Aeroflex Circuit Technology 3 SCDCT1496 REV A 3/22/00 Plainview NY (516) 694-6700 DC Electrical Characteristics (con’t) (VDD = 5V ±10%, T C = -55 °C to +100°C, unless otherwise specified) SYMBOL PARAMETER LIMIT Sync Bit, WI Bit, 4 Bit SIS / SOS Input & 32 Bit Parallel Word Input IIH IIL Logic High Input Current Logic Low Input Current 3/ 20µA max @ VIH = 2.5V -400µA max @ V IL = 0.5V DC Supply Currents ICC VCC = +5.5V (pin 31), all other pins at GND 590mA max Notes: 1/ and 2/ The total loads on these outputpairs (1 & 2) must be matched to within 15pF in order to maintain signal skews between the lines of < 5nSec maximum. 3/ Current out of a terminal is given as a negative value. 4/ Maximum total capacitance loads allowable on these pins are: DATA, DATA TX INHIBIT DATAst & DATAst 40 pF max 45 pF max 50 pF max AC Electrical Characteristics (VCC = 5V ±10%, T C = -55 °C to +100°C, See Figure 1, unless otherwise specified) Symbol T1 T2 PW1 T3 PW2 T4 T5 T6 T7 PW3 PW4 T8 T9 PW5 PW6 T10 T11 Parameter / Condition Stable input data setup time prior to Sys Clr / Load rising edge Stable input data hold time after Sys Clr / Load rising edge Sys Clr / Load pulsewidth Sys Clr / Load disable to Encoder Enable pulse Encode.


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