ACT15530

ACT15530 CMOS Manchester Encoder / Decoder Features • MIL-STD-1553 Compatible CIRCUIT TECHNOLOGY • 1.25 Megabit/sec Maximum Data Rate • Sync Identification and Lock-in • Clock Recovery • Manchester II Encode / Decode • Separate Encoder and Decoder Sections • Low Operating Power • Military Temperature Range -55°C to +125°C • Monolithic – Single Chip – Construction Valid Word Encoder Shift Clock Take Data Serial Data Out Decoder Clock Bipolar Zero In Bipolar One In Unipolar Data In Decoder Shift Clock Command/Data Sync Decoder Reset VSS 1 2 3 4 5 6 7 8 9 10 11 12 www.aeroflex.com 24 23 22 21 20 19 18 17 16 15 14 13 VDD Encoder Clock Send Clock In Send Data Sync Select Encoder Enable Serial Data In Bipolar One Out Output Inhibit Bipolar Zero Out ÷ 6 Out Master Reset Figure 1: Pin Assignments (24-Pin DIP/Flat Package – See Figure 18 for LCC Pkg) • Available in Commercial and Industrial Temperature Ranges • Several Package and Quality Options (Consult Factory for Details) • Direct Replacement for the Obsolete Harris HD15530-9/-2/8 and GEC Plessey Marconi MA15530 / MAS15530 parts 1 General Description The ACT15530 is a high performance CMOS integrated circuit used to implement MIL-STD-1553 and similar Manchester II encoded, time division multiplexed, serial data protocols. The device is divided into two independent sections, encoder and decoder, with a common master reset. The function of the encoder section is to produce the sync pulse and parity bit, and encode the data bits. The decoder section recognizes the sync pulse, decodes the data bits and checks for parity. The ACT15530 is fully guaranteed to support the 1 MHz data rate of MIL-STD-1553 over the full temperature and supply voltage ranges. The device interfaces with CMOS, TTL or N-Channel support circuitry and operates from a standard 5 volt supply. The circuit can also be used in many party line digital data communications applications where high reliability command and control signals are required. Using Aeroflex transceivers products (4400 Series) the Bit Error Rates (BER) and Word Error Rates (WER) of MIL-STD-1553 can be achieved (Refer to MIL-STD-1553 Multiplex Applications Handbook "MIL-HDBK-1553"). eroflex Circuit Technology – Data Bus Modules For The Future © SCD15330 REV B 7/28/99 12 13 22 14 Vss Master Reset Send Clock In VDD Output Inhibit 24 16 ÷ 6 Out ÷2 ÷6 Character Former 17 15 Bipolar One Out Bipolar Zero Out 23 Encoder Clock Bit Counter 21 Send Data 2 18 19 20 Sync Select Send Data In Encoder Enable Encoder Shift Clock Note: All Pin designations are for 24-Pin DIP & Flatpak Figure 2: Encoder Block Diagram Unipolar Data In Bipolar One In Bipolar Zero In 8 7 6 Transition Finder Character Identifier 3 10 4 Take Data Command / Data Sync Serial Data Out Decoder Clock 5 Synchronizer Bit Rate Clock Parity Check 1 Valid Word Master Reset 13 9 Decoder Shift Clock Decoder Reset 11 Bit Counter Note: All Pin designations are for 24-Pin DIP & Flatpak Figure 3: Decoder Block Diagram Aeroflex Circuit Technology 2 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 Pin Designations Pin 1 2 3 4 5 6 7 8 9 10 Input Output Enc Dec Function Valid word Encoder Shift Clock Comment A 'high' signals the receipt of a valid word Shifts data into the encoder on a 'low' to 'high' transition 'high' during data reception after the sync pulse is identified NRZ output of received data Clock for the transition finder and synchronizer which generates the clock for the rest of the decoder Should be 'high' when the bus is in a negative state. Must be tied 'high' when the unipolar input is used Should be 'high' when the bus is in a positive state. Must be tied 'low' when the unipolar input is used Input for unipolar data to the transition finder. Must be tied 'low' when not used Provides the DECODER CLOCK divided by 12, synchronized by the recovered serial data This output indicates the type of synchronizing character received as follows: If a data synchronizing character was received, this pin is low while the data is decoded. If a command synchronizing character was received, this pin is high during data decoding A 'high' during a DECODER SHIFT CLOCK rising edge resets the bit counter Ground A 'high" clears the counters in both sections Provides the ENCODER CLOCK divided by 6 Provides an active 'low' output to the zero or negative sense of a bipolar line driver A 'low' inhibits the BIPOLAR ZERO OUT and BIPOLAR ONE OUT by forcing them to inactive, 'high', states Provides an active 'low' output to the one or positive sense of a bipolar line driver Receives serial data at the rate of the ENCODER SHIFT CLOCK A 'high' starts the encode cycle provided that the previous cycle is complete A 'high' selects the command sync and a 'low' selects the data sync Provides an active 'high' to enable the external serial data source Clock input at 2 times the data rate Input to the divide by 6 circuit Positive Supply                     Take Data Serial Data Out Decoder clock Bipolar Zero In Bipolar One In Unipolar Data In Decoder Shift Clock Command/Data Sync 11 12 13 14 15 16  – –                  – Decoder Reset VSS Master Reset    ÷ 6 Out Bipolar Zero Out Output Inhibit  17 18 19 20 21 22 23 24 Bipolar One Out Serial Data In Encoder Enable Sync Select Send Data Send Clock In Encoder Clock      –   VDD Figure 4: Pin Designations (24-Pin Dip/FlatPack) Aeroflex Circuit Technology 3 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 DC Characteristics and Ratings Absolute Maximum Ratings Parameter VDD Input Voltage Operating Temperature Storage Temperature Min 3 Vss - 0.3 -55 -65 Max 7 VDD + 0.3V +125 +150 Units V V °C °C Figure 5: Absolute Maximum Ratings DC Characteristics Sym VIH VIL VIHC VILC IIL VOH VOL IDDSB Parameter Logic "1" Input Voltage Logic "0" Input Voltage Logic "1" Input Voltage (Clock) Logic "0" Input Voltage (Clock) Input Leakage Current Logic "1" Output Voltage Logic "0" Output Voltage Standby Supply Current Min 70%VDD VDD - 0.5V -1.0 2.4 - Typ - Max 30%VDD VSS + 0.5V +1.0 Units V V V V µA V V mA Test Conditions 0V < VIN < VDD IOH = -3 mA IOL = 1.8 mA Output Open VIN = VDD = 5.5V VDD = 5.5V, f = 1MHz 0.5 0.4 2.0 IDDOP CIN COUT Operating Supply Current Input Capacitance Output Capacitance - 8.0 5.0 8.0 10.0 7.0 10.0 mA pF pF VDD = 5V ±10%, over full operating temperature range. Figure 6: DC Characteristics Aeroflex Circuit Technology 4 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 AC Characteristics Sym fEC fESC tECR tECF fED tMR tE1 tE2 tE3 tE4 tE5 tE6 tE7 tE8 tE9 Parameter Encoder clock frequency Send clock frequency Encoder clock rise time Encoder clock fall time Data rate Master reset pulse width Shift clock delay Serial data setup time Serial data hold time Enable setup time Enable pulse width Sync setup time Sync pulse width Send data delay Bipolar output delay Min 0 0 0 150 75 75 90 100 55 150 0 - Limits Max 15 2.5 8 8 1.25 125 50 130 Units MHz MHz ns ns MHz ns ns ns ns ns ns ns ns ns ns Figure 7: Encoder Electrical Characteristics 1. VDD = 5V ±10%, over full operating temperature range. 2. CL=50pF. Sym fDC tDCR tDCF fDD tDR tDRS tMR t D1 t D2 t D3 t D4 t D5 t D6 t D7 t D8 t D9 tD10 tD11 Parameter Decoder clock frequency Decoder clock rise time Decoder clock fall time Data rate Decoder reset pulse width Decoder reset setup time Master reset pulse width Bipolar data pulse width Sync transition span One-Zero overlap Short data transition span Long data transition span Sync delay (on) Take data delay (on) Serial data out delay Sync delay (off) Take data delay (off) Valid word delay Limits Min 0 0 150 75 150 tDC + 10 -20 0 0 0 0 Typ 18tDC 6tDC 12tDC - Max 15 8 8 1.25 tDC - 10 110 110 80 110 110 110 Units MHz MHz ns MHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns Figure 8: Decoder Electrical Characteristics 1. VDD = 5V ±10%, over full operating temperature range. 2. CL=50pF. 3. tDC = Decoder clock period = 1/fDC Aeroflex Circuit Technology 5 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 Encoder Operation The Encoder requires a single clock with a frequency of twice the desired data rate applied at the SEND CLOCK input. An auxiliary divide by six counter is provided on chip which can be utilised to produce the SEND CLOCK by dividing the DECODER CLOCK. The Encoder's cycle begins when ENCODER ENABLE is high during a failing edge of ENCODER SHIFT CLOCK x. This cycle lasts for one word length or twenty ENCODER SHIFT CLOCK periods. At the next low-to-high transition of the ENCODER SHIFT CLOCK, a high at SYNC SELECT input actuates a command sync or a low will produce a data sync for that word y. When the Encoder is ready to accept data, the SEND DATA output will go high and remain high for sixteen ENCODER SHIFT CLOCK periods z. During these sixteen periods the data should be clocked into the SERIAL DATA input with every low-high transition of the ENCODER SHIFT CLOCK z - {. After the sync and the Manchester II coded data are chip transmitted through the BIPOLAR ONE and BIPOLAR ZERO outputs, the Encoder adds on an additional bit which is the parity for that word |. At any time a low in OUTPUT INHIBIT input will force both bipolar outputs to a high state but will not affect the Encoder in any other way. To abort the Encoder transmission a positive pulse must be applied at MASTER RESET. Anytime after or during this pulse, a low to high transition on SEND CLOCK clears the internal counters and initializes the Encoder for a new word. Timing 01 2 3 4 5 6 7 15 16 17 18 19 Send Clock Encoder Shift Clock Encoder Enable Don’t Care Sync Select Valid Don’t Care Send Data Serial Data In Bipolar One Out 15 14 13 12 11 10 32 1 0 1st 2nd 15 14 13 12 11 3 2 1 0 P Half Half Bipolar Zero Out Sync Sync 15 14 13 12 11 3 2 1 0 P 1 2 3 4 5 Figure 9: Encoder Operation Aeroflex Circuit Technology 6 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 Decoder Operation The Decoder requires a single clock with a frequency of 12 times the desired data rate applied at the DECODER CLOCK input. The Manchester II coded data can be presented to the Decoder in one of two ways. The BIPOLAR ONE and BIPOLAR ZERO inputs will accept data from a comparator sensed transformer coupled bus as specified in MIL-STD-1553. The UNIPOLAR DATA input can only accept non-inverted Manchester II coded data (e.g.from BIPOLAR ZERO OUT of an Encoder). The Decoder is free running and continuously monitors its data input lines for a valid sync character and two valid Manchester data bits to start an output cycle.. When a valid sync is recognized x, the type of sync is indicated on COMMAND/DATA SYNC output. if the sync character was a command sync, this output will go high y and remain high for sixteen DECODER SHIFT CLOCK periods z, otherwise it will remain low. The TAKE DATA output will go high and remain high y - z while the Decoder is transmitting the decoded data through SERIAL DATA OUT. The decoded data available at SERIAL DATA OUT is in a NRZ format. The DECODER SHIFT CLOCK is provided so that the decoded bits can get shifted into an external register on every low-to-high transition of this clock y - z. After all sixteen decoded bits have been transmitted z the data is checked for odd parity. A high on VALID WORD output { indicates a successful reception of a word without any Manchester or parity errors. At this time the Decoder is looking for a new sync character to start another output sequence. At any time in the above sequence, a high input on DECODER RESET during a low-to-high transition of DECODER SHIFT CLOCK will abort transmission and initialize the Decoder to start looking for a new sync character. Timing 0 12 3 4 5 6 7 8 16 17 18 19 Decoder Shift Clock Bipolar One In Bipolar Zero In 1st 2nd 15 14 13 12 11 10 Half Half Sync Sync 15 14 13 12 11 10 2 1 0 P 2 1 0 P Take Data Command/Data Sync Serial Data Out Undefined 15 14 13 12 4 3 2 1 0 Valid Word (From Previous Reception) 1 2 3 4 Figure 10: Decoder Operation Aeroflex Circuit Technology 7 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 Send Clock tE1 Encoder Shift Clock tE2 Serial Data In Valid Valid tE3 Send Clock tE1 Encoder Shift Clock tE4 tE6 Encoder Enable tE5 Sync Select Valid tE8 Encoder Shift Clock tE7 Send Clock tE9 Send Clock Bipolar One Out or Bipolar Zero Out Figure 11: Encoder Timing Diagram Aeroflex Circuit Technology 8 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 ONE BIT PER. ZERO BIT PER. ONE BIT PER. 1/ Bipolar One In Command Sync 1/ Bipolar Zero In tD1 tD2 tD3 tD3 tD2 tD1 1/ Bipolar One In Data Sync 1/ Bipolar Zero In tD2 tD3 tD3 tD1 1/ Bipolar One In tD2 tD3 tD3 tD3 1/ Bipolar Zero In tD3 tD3 tD3 tD4 tD1 tD5 tD5 tD1 tD4 tD2 2/ Unipolar In Command Sync 2/ Unipolar In Data Sync 2/ Unipolar In tD2 tD2 tD2 tD4 tD4 ONE tD5 ZERO tD5 ONE tD4 ONE Notes: 1. Unipolar In = 0 2. Bipolar One In = 0 Bipolar Zero In = 1 Figure 12: Decoder Timing Diagram Aeroflex Circuit Technology 9 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 tD7 tD6 Decoder Shift Clock Command / Data Sync Take Data Decoder Shift Clock tD8 Serial Data Out Data Bit Decoder Shift Clock tD9 Command / Data Sync tD10 tD11 Take Data Valid Word Decoder Shift Clock tDRS Decoder Reset tDR Figure 13: Decoder Timing Details Aeroflex Circuit Technology 10 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 Command Sync Data Sync Bit Period Bit Period Bit Period Logical One Data Logical Zero Data Figure 14: Character Formats 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Command Word (From Controller to Terminal) 5 1 5 5 1 Sync Terminal Address R/T Subaddress Mode Data Word Count P Data Word (Sent Either Direction) 16 1 Sync Data Word P Status Word (From Terminal to Controller) 5 1 9 1 1 Sync Terminal Address ME Code for Failure Modes TF P Figure 15: Word Formats Aeroflex Circuit Technology 11 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 D Pin 1 Notch e W ME Seating Plane A A1 H 0-15° Alernative Pin Shapes b c e1 0-15° Valid Word Encoder Shift Clock Take Data Serial Data Out Decoder Clock Bipolar Zero In Bipolar One In Unipolar Data In Decoder Shift Clock Command/Data Sync Decoder Reset VSS 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VDD Encoder Clock Send Clock In Send Data Sync Select Encoder Enable Serial Data In Bipolar One Out Output Inhibit Bipolar Zero Out ÷ 6 Out Master Reset Ref. A A1 Min. 0.38 (0.015) 0.35 (0.014) 0.20 (0.008) 4.71 (0.185) - Nom. 2.54 (0.100) Typ 15.24 (0.600) Typ - Max. 5.60 (0.220) 1.53 (0.060) 0.59 (0.023) 0.36 (0.014) 30.79 (1.212) 5.38 (0.212) 15.90 (0.626) 1.53 (0.060) b c D e e1 H ME W Dimensions in mm (inches) Figure 16: 24-Lead Ceramic DIL (Solder Seal) - Package Style C Aeroflex Circuit Technology 12 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 M b D Z e L A c ME A1 Ref. A A1 Min. 0.25 (0.010) 0.38 (0.015) 0.10 (0.004) 14.86 (0.585) 6.73 (0..265) 9.91 (0.390) 7.6 (0.30) 0.13 (0.005) Nom. 1.275 (0.050) - Max. 2.67 (0.105) 1.02 (0.040) 0.48 (0.019) 0.18 (0.007) 15.62 (0615) 7.75 (0.305) 10.41 (0.410) 1.14 (0.045) b c Pin 1 Index D e L M ME Z Dimensions in mm (inches) VDD Encoder Clock Send Clock In Send Data Sync Select Encoder Enable Serial Data In Bipolar One Out Output Inhibit Bipolar Zero Out ÷ 6 Out Master Reset 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 Bottom View 6 7 8 9 10 11 12 Valid Word Encoder Shift Clock Take Data Serial Data Out Decoder Clock Bipolar Zero In Bipolar One In Unipolar Data In Decoder Shift Clock Command/Data Sync Decoder Reset VSS Figure 17: 24-Lead Ceramic Flatpack (Solder Seal) - Package Style CF Aeroflex Circuit Technology 13 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 TOP VIEW ENCODER SHIFT CLK SERIAL DAA OUT ENCODER CLK 4 DECODER CLK 5 NC 6 NC 7 BIPOLAR ZERO IN 8 BIPOLAR ONE IN 9 UNIPOLAR DATA IN 10 DECODER SHIFT CLOCK 11 12 COMMAND / DATA SYNC 3 2 1 28 27 26 25 SEND DATA 24 NC 23 NC 22 SYNC SELECT 21 ENCODER ENABLE 20 SERIAL DATA IN 19 BIPOLAR ONE OUT 13 14 15 16 17 18 DECOD ER RESET MASTER R ESET OUTPUT INHIBIT 6 OUT BIPOLAR ZERO OUT GROUND BOTTOM VIEW .003 .015 .075 .095 .006 .022 .442 .458 .022 .028 .045 .055 .015 MIN .050 BSC .442 .458 .090 ÷ SEND CLK IN VALID WORD TAKE DATA Vcc MAX .074 .088 Figure 18: 28-Leadless Ceramic Chip Carrier - Package Style L Aeroflex Circuit Technology 14 SCD15530 REV B 7/28/99 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Ordering Information Model Number ACT15530XX Part Number See Below or Contact Factory Part Number Breakdown ACT15530 X X Package Type C Ceramic DIL (Figure 16) CF Flatpack (Figure 17) L LCC (Figure 18) N Naked Die * P Plastic DIP * Rel Level B Class B Operating Temperature (Figure 5) -55°C to +125°C C Commercial (0°C to+70°C) I Industrial (-40°C to +85°C) S Space * * Contact Factory for Details Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Specifications subject to change without notice. Aeroflex Circuit Technology Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800)THE-1553 15 SCD15330 REV B 7/28/99 Plainview NY (516) 694-6700