Fibre Channel Transceiver Chip Technical Data HDMP-1536 Transceiver HDMP-1546 Transceiver Features Description • ANSI X3.230-1994 Fibre Channel Compatible (FC-0) • Supports Full Speed (1062.5 MBd) Fibre Channel • Compatible with “Fibre Channel 10-Bit Interface” Specification • Low Power Consumption, 630 mW • Transmitter and Receiver Functions Incorporated onto a Single IC • Auto Frequency Lock • Small Package Profile HDMP-1536, 10x10 mm QFP HDMP-1546, 14x14 mm QFP • 10-Bit Wide Parallel TTL Compatible I/Os • Single +3.3 V Power Supply The HDMP-1536/46 transceiver is a single silicon bipolar integrated circuit packaged in a plastic QFP package. It provides a low-cost, low-power physical layer solution for 1062.5 MBd Fibre Channel or proprietary link interfaces. It provides complete FC-0 functionality for copper transmission, incorporating both the Fibre Channel FC-0 transmit and receive functions into a single device. Applications This chip is used to build a highspeed interface (as shown in Figure 1) while minimizing board space, power, and cost. It is compatible with both the ANSI X3.230-1994/AM 1 - 1996 document and the “Fibre Channel 10-bit Interface” specification. • 1062.5 MBd Fibre Channel Interface • FC Interface for Disk Drives and Arrays • Mass Storage System I/O Channel • Work Station/Server I/O Channel • High Speed Proprietary Interface • High Speed Backplane Interface The transmitter section accepts 10-bit wide parallel TTL data and multiplexes this data into a highspeed serial data stream. The parallel data is expected to be 8B/10B encoded data, or equivalent. This parallel data is latched into the input register of the transmitter section on the rising edge of the 106.25 MHz reference clock (used as the transmit byte clock). 696 The transmitter section’s PLL locks to this user supplied 106.25 MHz byte clock. This clock is then multiplied by 10, to generate the 1062.5 MHz serial signal clock used to generate the highspeed output. The high-speed outputs are capable of interfacing directly to copper cables for electrical transmission or to a separate fiber-optic module for optical transmission. The receiver section accepts a serial electrical data stream at 1062.5 MBd and recovers the original 10-bit wide parallel data. The receiver PLL locks onto the incoming serial signal and recovers the high-speed serial clock and data. The serial data is 5965-8113E (4/97) HDMP-15x6 TRANSMITTER SECTION SERIAL DATA OUT PLL PROTOCOL DEVICE PLL SERIAL DATA IN RECEIVER SECTION BYTSYNC REFCLK ENBYTSYNC -LCKREF DATA BYTE TX[0-9] INPUT LATCH Figure 1. Typical Application Using the HDMP-15x6. FRAME MUX OUTPUT SELECT INTERNAL LOOPBACK TXCAP0 TXCAP1 TX PLL/CLOCK GENERATOR INTERNAL TX CLOCKS REFCLK -LCKREF RXCAP0 RXCAP1 RBC0 RBC1 LOOPEN ± DIN RX PLL/CLOCK RECOVERY OUTPUT DRIVER DATA BYTE RX[0-9] INPUT SELECT ± DOUT FRAME DEMUX AND BYTE SYNC BYTSYNC INTERNAL RX CLOCKS INPUT SAMPLER ENBYTSYNC Figure 2. HDMP-15x6 Transceiver Block Diagram. 697 converted back into 10-bit parallel data, recognizing the 8B/10B comma character to establish byte alignment. The recovered parallel data is presented to the user at TTL compatible outputs. The receiver section also recovers two 53.125 MHz receiver byte clocks that are 180 degrees out of phase with each other. The parallel data is properly aligned with the rising edge of alternating clocks. The transceiver provides for onchip local loop-back functionality, controlled through an external input pin. Additionally, the byte synchronization feature may be disabled. This may be useful in proprietary applications which use alternative methods to align the parallel data. HDMP-1536/46 Block Diagram The HDMP-1536/46 was designed to transmit and receive 10-bit wide parallel data over a single high-speed line, as specified for the FC-0 layer of the Fibre Channel standard. The parallel data applied to the transmitter is expected to be encoded per the Fibre Channel specification, which uses an 8B/10B encoding scheme with special reserve characters for link management purposes. In order to accomplish this task, the HDMP-1536/46 incorporates the following: • TTL Parallel I/Os • High Speed Phase Lock Loops • Clock Generation/Recovery Circuitry • Parallel to Serial Converter • High-Speed Serial Clock and Data Recovery Circuitry • Comma Character Recognition Circuitry 698 • Byte Alignment Circuitry • Serial to Parallel Converter INPUT LATCH The transmitter accepts 10-bit wide TTL parallel data at inputs TX[0..9]. The user-provided reference clock signal, REFCLK, is also used as the transmit byte clock. The TX[0..9] and REFCLK signals must be properly aligned, as shown in Figure 3. TX PLL/CLOCK GENERATOR The transmitter Phase Lock Loop and Clock Generator (TX PLL/ CLOCK GENERATOR) block is responsible for generating all internal clocks needed by the transmitter section to perform its functions. These clocks are based on the supplied reference byte clock (REFCLK). REFCLK is used as both the frequency reference clock for the PLL and the transmit byte clock for the incoming data latches. It is expected to be 106.25 MHz and properly aligned to the incoming parallel data (see Figure 3). This clock is multiplied by 10 to generate the 1062.5 MHz clock necessary for the high speed serial outputs. FRAME MUX The FRAME MUX accepts the 10bit wide parallel data from the INPUT LATCH. Using internally generated high speed clocks, this parallel data is multiplexed into the 1062.5 MBd serial data stream. The data bits are transmitted sequentially, from the least significant bit (TX) to the most significant bit (TX). OUTPUT SELECT The OUTPUT SELECT block provides for an optional internal loopback of the high speed serial signal, for testing purposes. In normal operation, LOOPEN is set low and the serial data stream is placed at ± DOUT. When wrapmode is activated by setting LOOPEN high, the ± DOUT pins are held static and the serial output signal is internally wrapped to the INPUT SELECT box of the receiver section. INPUT SELECT The INPUT SELECT block determines whether the signal at ± DIN or the internal loop-back serial signal is used. In normal operation, LOOPEN is set low and the serial data is accepted at ± DIN. When LOOPEN is set high, the high-speed serial signal is internally looped-back from the transmitter section to the receiver section. This feature allows for loop-back testing exclusive of the transmission medium. RX PLL/CLOCK RECOVERY The RX PLL/CLOCK RECOVERY block is responsible for frequency and phase locking onto the incoming serial data stream and recovering the bit and byte clocks. An automatic locking feature allows the Rx PLL to lock onto the input data stream without external controls. It does this by continually frequency locking onto the 106.25 MHz clock, and then phase locking onto the input data stream. An internal signal detection circuit monitors the presence of the input, and invokes the phase detection as the data stream appears. Once bit locked, the receiver generates the high speed sampling clock at 1062.5 MHz for the input sampler, and recovers the two 53.125 MHz receiver byte clocks (RBC1/ RBC0). These clocks are 180° out of phase with each other, and are alternately used to clock the 10bit parallel output data. An optional -LCKREF pin is available for users who want to gain full control during the frequency acquisition process. Asserting this pin will force the Rx PLL to fully phase and frequency lock onto the reference clock, disregarding the serial stream completely. To enable the auto-locking feature, the -LCKREF pin should be tied to VCC. The receiver will detect the absence of high-speed serial data into +DIN (pin 54) and -DIN (pin 52) and lock onto the reference clock (REFCLK). RBC0 and RBC1 will remain frequency locked to 53.125 MHz. The receiver will frequency and phase lock onto the incoming valid data once it is reapplied. INPUT SAMPLER The INPUT SAMPLER is responsible for converting the serial input signal into a re-timed serial bit stream. In order to accomplish this, it uses the high speed serial clock recovered from the RX PLL/CLOCK RECOVERY block. This serial bit stream is sent to the FRAME DEMUX and BYTE SYNC block. FRAME DEMUX AND BYTE SYNC The FRAME DEMUX AND BYTE SYNC block is responsible for restoring the 10-bit parallel data from the high speed serial bit stream. This block is also responsible for recognizing the comma character (or a K28.5 character) of positive disparity (0011111xxx). When recognized, the FRAME DEMUX AND BYTE SYNC block works with the RX PLL/CLOCK RECOVERY block to properly align the receive byte clocks to the parallel data. When a comma character is detected and realignment of the receiver byte clocks (RBC1/RBC0) is necessary, these clocks are stretched, not slivered, to the next possible correct alignment position. These clocks will be fully aligned by the start of the second 4-byte ordered set. The second comma character received shall be aligned with the rising edge of RBC1. Comma characters should not be transmitted in consecutive bytes to allow the receiver byte clocks to maintain their proper recovered frequencies. OUTPUT DRIVERS The OUTPUT DRIVERS present the 10-bit parallel recovered data byte properly aligned to the receiver byte clocks (RBC1/RBC0), as shown in Figure 5. These output data buffers provide TTL compatible signals. Recommended Handling Precautions Additional circuitry is built into the various input and output pins on this chip to protect against low level electrostatic discharge; however, they are still ESD sensitive. Standard procedures for static sensitive devices should be used in the handling and assembly of this product. 699 HDMP-1536/46 (Transmitter Section) Timing Characteristics TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter tsetup Setup Time thold Hold Time t_txlat Transmitter Latency Units nsec nsec nsec bits Min. 2 1.5 Typ. Max. 7.5 8.0 Notes: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. 2. The transmitter latency, as shown in Figure 4, is defined as the time between the latching in of the parallel data word (as triggered by the rising edge of the transmit byte clock, REFCLK) and the transmission of the first serial bit of that parallel word (defined by the rising edge of the first bit transmitted). , ,,,, ,, 1.4 V REFCLK TX-TX DATA DATA DATA DATA 2.0 V DATA 0.8 V tsetup thold Figure 3. Transmitter Section Timing. ,, ,, DATA BYTE A ± DOUT T5 T6 T7 T8 T9 T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T0 DATA BYTE B T1 T2 T3 T4 T5 t_txlat TX-TX REFCLK Figure 4. Transmitter Latency. 700 DATA BYTE B DATA BYTE C 1.4 V HDMP-1536/46 (Receiver Section) Timing Characteristics TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter [2,3] b_sync Bit Sync Time tvalid_before Time Data Valid Before Rising Edge of RBC tvalid_after Time Data Valid After Rising Edge of RBC tduty RBC Duty Cycle  tA-B Rising Edge Time Difference  t_rxlat Receiver Latency Units bits nsec nsec % nsec nsec bits Min. Typ. 3 1.5 40 8.9 3.8 3.5 Max. 2500 60 9.9 9.4 24.5 26 Notes: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. 2. This is the recovery time for input phase jumps, per the FC-PH specification Ref 4.1, Sec 5.3. 3. Tested using CPLL = 0.1 µF. 4. The RBC clock skew is calculated as tA-B(max) - tA-B(min). 5. The receiver latency, as shown in Figure 6, is defined as the time between receiving the first serial bit of a parallel data word (as defined as the first edge of the first serial) and the clocking out of that parallel word (defined by the rising edge of the receive byte clock, either RBC1 or RBC0). , , ,, , ,, ,, tvalid_before tvalid_after RBC1 1.4 V 2.0 V RX-RX K28.5 DATA DATA DATA DATA 0.8 V 2.0 V BYTSYNC 0.8 V 1.4 V RBC0 tA-B Figure 5. Receiver Section Timing. ,, ,, DATA BYTE C ± DIN R5 R6 R7 R8 DATA BYTE D R9 R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R2 R3 R4 R5 t_rxlat RX-RX RBC1/0 DATA BYTE A DATA BYTE D 1.4 V Figure 6. Receiver Latency. 701 Absolute Maximum Ratings TA = 25°C, except as specified. Operation in excess of any one of these conditions may result in permanent damage to this device. Symbol VCC VIN,TTL VIN,HS_IN IO,TTL Tstg Tj Parameter Units V V V mA °C °C Supply Voltage TTL Input Voltage HS_IN Input Voltage TTL Output Source Current Storage Temperature Junction Operating Temperature Min. -0.5 -0.7 2.0 -40 0 Max. 5.0 VCC + 0.7 VCC 13 +130 +130 Guaranteed Operating Rates TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Parallel Clock Rate (MHz) Serial Baud Rate (MBaud) Min. Max. Min. Max. 106.20 106.30 1062.0 1063.0 Note: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. Transceiver Reference Clock Requirements TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter f Nominal Frequency (for Fibre Channel Compliance) Ftol Frequency Tolerance Symm Symmetry (Duty Cycle) Unit MHz ppm % Min. 106.20 -100 40 Typ. 106.25 Max. 106.30 +100 60 Note: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. DC Electrical Specifications TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter VIH,TTL TTL Input High Voltage Level, Guaranteed High Signal for All Inputs VIL,TTL TTL Input Low Voltage Level, Guaranteed Low Signal for All Inputs VOH,TTL TTL Output High Voltage Level, IOH = -400 µA VOL,TTL TTL Output Low Voltage Level, IOL = 1 mA IIH,TTL Input High Current (Magnitude), VIN = VCC IIL-TTL Input Low Current (Magnitude), VIN = 0 Volts ICC,TRx[2,3] Transceiver VCC Supply Current, TA = 25°C Unit V Min. 2 Typ. V 0 0.8 V V µA µA mA 2.2 0 VCC 0.6 40 -600 0.004 -325 220 Max. VCC Notes: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. 2. Measurement Conditions: Tested sending 1062.5 MBd PRBS 27-1 sequence from a serial BERT with both DOUT outputs biased with 150 Ω resistors. 3. Typical specified with VCC = 3.3 volts, maximum specified with VCC = 3.45 volts. 702 AC Electrical Specifications TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter tr,TTLin Input TTL Rise Time, 0.8 to 2.0 Volts tf,TTLin Input TTL Fall Time, 2.0 to 0.8 Volts tr,TTLout Output TTL Rise Time, 0.8 to 2.0 Volts, 10 pF Load tf,TTLout Output TTL Fall Time, 2.0 to 0.8 Volts, 10 pF Load trs,HS_OUT HS_OUT Single-Ended (+DOUT) Rise Time tfs,HS_OUT HS_OUT Single-Ended (+DOUT) Fall Time trd,HS_OUT HS_OUT Differential Rise Time tfd,HS_OUT HS_OUT Differential Fall Time VIP,HS_IN HS_IN Input Peak-to-Peak Differential Voltage VOP,HS_OUT HS_OUT Output Peak-to-Peak Differential Voltage Units nsec nsec nsec nsec psec psec psec psec mV mV Min. 200 1200 Typ. 2 2 1.5 1.1 255 185 255 185 1200 1600 Max. 2.4 2.4 375 375 2000 2200 Notes: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. 2. Output Peak-to-Peak Differential Voltage specified as DOUT+ minus DOUT-. 200.0 ps/div 22.0680 ns Yaxis = 400 mV/DIV a. Differential HS_OUT Output (Dout+ Minus Dout-). 200.0 ps/div 22.0680 ns Yaxis = 200 mV/DIV b. Single-Ended HS_OUT Output (Dout+). Eye Diagrams of the High-Speed Serial Outputs from the HDMP-1536/46 as Captured on the HP 83480A Digital Communications Analyzer. Tested with PRBS = 27-1. Figure 7. Transmitter DOUT Eye Diagrams. 703 Output Jitter Characteristics TA = 25°C, VCC = 3.3 V Symbol Parameter  RJ Random Jitter at DOUT, the High Speed Electrical Data Port, specified as 1 sigma deviation of the 50% crossing point (RMS) DJ Deterministic Jitter at DOUT, the High Speed Electrical Data Port (pk-pk) Units ps Typ. 8 ps 15 Note: 1. Defined by Fibre Channel Specification Rev 4.1, Annex A, Section A.4 and tested using measurement method shown in Figure 8. HP70841B PATTERN GENERATOR HP70311A CLOCK SOURCE +K28.5, -K28.5 HP70841B PATTERN GENERATOR* HP83480A OSCILLOSCOPE + DATA - DATA 1.25 GHz 0000011111 + DATA - DATA 106.25 MHz CH1 1.0625 GHz HP83480A OSCILLOSCOPE TRIGGER CH2 HP70311A CLOCK SOURCE +DOUT BIAS TEE DIVIDE BY 2 CIRCUIT TRIGGER CH1 +DOUT HDMP-1536 Tx[0..9] VARIABLE DELAY TTL -DOUT HDMP-1636 125 MHz REFCLK Tx[0..9] 1.4 V CH2 -DOUT REFCLK LOOPEN * PATTERN GENERATOR PROVIDES A DIVIDE BY 10 FUNCTION. DIVIDE BY 10 CIRCUIT (DUAL OUTPUT) -DIN +DIN ENBYTSYNC LOOPEN Rx[0..9] 0011111000 (STATIC K28.7) a. Block Diagram of RJ Measurement Method. b. Block Diagram of DJ Measurement Method. Figure 8. Transmitter Jitter Measurement Method. Thermal and Power Temperature Characteristics, TA = 0°C to +60°C, VCC = 3.15 V to 3.45 V Symbol Parameter [2,3] PD,TRx Transceiver Power Dissipation, Outputs Open, Parallel Data has 5 Ones and 5 Zeroes PD,TRx[2,3,4] Transceiver Power Dissipation, Outputs Connected per Recommended Bias Terminations with Idle Pattern  Θjc Thermal Resistance, Junction to Case HDMP-1536 HDMP-1546 Units mW Typ. 630 Max. 850 mW 685 900 °C/Watt 10 7 Notes: 1. Device tested and characterized under TA conditions specified, with TC monitored at approximately 20° higher than TA. 2. PD is multiplying the max VCC by the max ICC and subtracting the power dissipated outside the chip at the high speed bias resistors. 3. Typical specified with VCC = 3.3 volts, maximum specified with VCC = 3.45 volts. 4. Specified with high speed outputs biased with 150 Ω resistors and receiver TTL outputs driving 10 pF loads. 5. Based on independant package testing by HP. Θja for these devices is 48°C/Watt for the HDMP-1536 and 44°C/Watt for the HDMP-1546. Θja is measured on a standard 3x3" FR4 PCB in a still air environment. To determine the actual junction temperature in a given application, use the value as described as follows: Tj = TC + (Θjc x Pd), where TC is the case temperature measured on the top center of the package and PD is the power being dissipated. 704 I/O Type Definitions I/O Type I-TTL O-TTL HS_OUT HS_IN C S Definition Input TTL, Floats High When Left Open Output TTL High Speed Output, ECL Compatible High Speed Input External Circuit Node Power Supply or Ground Pin Input Capacitance Symbol CINPUT Parameter Input Capacitance on TTL Input Pins Units pF O_TTL Typ. 1.6 Max. I_TTL VCC_TTL R VCC_TTL VCC_TX or VCC_RX R R R R VBB 1.4 V GND GND_TTL ESD PROTECTION ESD PROTECTION GND_TTL Figure 9. O-TTL and I-TTL Simplified Circuit Schematic. HS_OUT HS_IN VCC_RXHS VCC_TXHS VCC_TXECL + – + – R VCC_TX VCC_RX R +DOUT Zo = 75 Ω 0.01 +DIN RPAD 150 -DOUT 150 RPAD Zo = 75 Ω -DIN 0.01 GND ESD PROTECTION GND ESD 150 PROTECTION GND_TXHS GND_RXHS Figure 10. HS_OUT and HS_IN Simplified Circuit Schematic. Notes: 1. HS_IN inputs should never be connected to ground as permanent damage to the device may result. 2. The optional series padding resistors (Rpad) help dampen load reflections. Typical Rpad values for mismatched loads range between 25-75 Ω. 705 VCC_RXA RXCAP1 -DIN GND_RXA VCC_RXHS VCC_RXHS +DIN GND VCC_RX GND_RXHS VCC_TXHS +DOUT -DOUT VCC_TXECL VCC_TX GND_TXHS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 GND_TXTTL 1 48 TX 2 47 RXCAP0 BYTSYNC TX 3 46 GND_RXTTL TX 4 45 RX VCC_TXTTL TX 5 6 44 43 RX RX TX TX TX 7 8 9 42 41 40 VCC_RXTTL RX RX RX RX VCC_TXTTL TX TX TX GND_TXTTL GND_TXA TXCAP1 10 11 12 HDMP-15x6 xxxx-x Rz.zz S YYWW 39 38 37 36 35 34 33 13 14 15 16 RBC0 GND_RXTTL VCC_RX VCC_RXTTL RBC1 *N/C -LCKREF VCC_RX ENBYTSYNC GND TXCAP0 VCC_TXA LOOPEN VCC_TX GND REFCLK 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 xxxx-x = WAFER LOT NUMBER–BUILD NUMBER Rzz.zz = DIE REVISION S = SUPPLIER CODE YYWW = DATE CODE (YY = YEAR, WW = WORK WEEK) COUNTRY = COUNTRY OF MANUFACTURE (MARKED ON BACK OF DEVICE) Figure 11. HDMP-1536/46 (TRx) Package Layout and Marking, Top View. *Note: Pin 26 is designated as a “no connect” pin and should be left unconnected. 706 VCC_RXTTL RX RX RX GND_RXTTL TRx I/O Definition Name BYTSYNC Pin 47 -DIN +DIN -DOUT +DOUT 52 54 61 62 ENBYTSYNC 24 GND 21 25 58 51 GND_RXA GND_RXHS GND_RXTTL Type O-TTL Signal Byte Sync Output: An active high output. Used to indicate detection of either a comma character or a K28.5 special character (0011111XXX). It is only active when ENBYTSYNC is enabled. HS_IN Serial Data Inputs: High-speed inputs. Serial data is accepted from the ± DIN inputs when LOOPEN is low. HS_OUT Serial Data Outputs: High-speed outputs. These lines are active when LOOPEN is set low. When LOOPEN is set high, these outputs are held static. I-TTL Enable Byte Sync Input: When high, turns on the internal byte sync function to allow clock synchronization to a comma character, or a K28.5 character (0011111XXX). When the line is low, the function is disabled and will not reset registers and clocks, or strobe the BYTSYNC line. S Logic Ground: Normally 0 volts. This ground is used for internal PECL logic. It should be isolated from the noisy TTL ground as well as possible. S 56 32 33 46 15 S S S S -LCKREF 64 1 14 27 I-TTL LOOPEN 19 I-TTL RBC1 RBC0 30 31 O-TTL REFCLK 22 I-TTL GND_TXA GND_TXHS GND_TXTTL S Analog Ground: Normally 0 volts. Used to provide a clean ground plane for the receiver PLL and high-speed analog cells. Ground: Normally 0 volts. TTL Receiver Ground: Normally 0 volts. Used for the TTL output cells of the receiver section. Analog Ground: Normally 0 volts. Used to provide a clean ground plane for the PLL and high-speed analog cells. Ground: Normally 0 volts. TTL Transmitter Ground: Normally 0 volts. Used for the TTL input cells of the transmitter section. Lock to Reference: When low, causes the PLL to acquire frequency and phase lock on the external reference, supplied at REFCLK. When high, the Rx PLL will automatically frequency lock to REFCLK and phase lock to the high speed data stream. Loopback Enable Input: When set high, the high-speed serial signal is internally wrapped from the transmitter’s serial loopback outputs back to the receiver’s loopback inputs. Also, when in loopback mode, the ± DOUT outputs are held static. When set low, ± DOUT outputs and ± DIN inputs are active. Receiver Byte Clocks: The receiver section recovers two 53.125 MHz receive byte clocks. These two clocks are 180 degrees out of phase. The receiver parallel data outputs are alternatively clocked on the rising edge of these clocks. The rising edge of RBC1 aligns with the output of the comma character (for byte alignment) when detected. Reference Clock and Transmit Byte Clock: A 106.25 MHz clock supplied by the host system. The transmitter section accepts this signal as the frequency reference clock. It is multiplied by 10 to generate the serial bit clock and other internal clocks. The transmit side also uses this clock as the transmit byte clock for the incoming parallel data TX..TX. It also serves as the reference clock for the receive portion of the transceiver. 707 TRx I/O Definition (cont’d.) Name RX RX RX RX RX RX RX RX RX RX RXCAP0 RXCAP1 TX TX TX TX TX TX TX TX TX TX TXCAP1 TXCAP0 VCC_RX Pin 45 44 43 41 40 39 38 36 35 34 48 49 2 3 4 6 7 8 9 11 12 13 16 17 23 28 57 50 Type O-TTL VCC_RXHS 53 55 S VCC_RXTTL S VCC_TXA 29 37 42 20 59 18 VCC_TXECL 60 S VCC_TXHS 63 S VCC_TXTTL 5 10 S VCC_RXA VCC_TX 708 C I-TTL C S S S S Signal Data Outputs: One 10 bit data byte. RX is the first bit received. RX is the least significant bit. Loop Filter Capacitor: A loop filter capacitor for the internal PLL must be connected across the RXCAP0 and RXCAP1 pins. (typical value = 0.1 µF). Data Inputs: One, 10 bit, pre-encoded data byte. TX is the first bit transmitted. TX is the least significant bit. Loop Filter Capacitor: A loop filter capacitor must be connected across the TXCAP1 and TXCAP0 pins (typical value = 0.1 µF). Logic Power Supply: Normally 3.3 volts. Used for internal receiver PECL logic. It should be isolated from the noisy TTL supply as well as possible. Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the PLL and high-speed analog cells. High-Speed Supply: Normally 3.3 volts. Used only for the high-speed receiver cell (HS_IN). Noise on this line should be minimized for best operation. TTL Power Supply: Normally 3.3 volts. Used for all TTL receiver output buffer cells. Logic Power Supply: Normally 3.3 volts. Used for internal transmitter PECL logic. It should be isolated from the noisy TTL supply as well as possible. Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the PLL and high-speed analog cells. High-Speed ECL Supply: Normally 3.3 volts. Used only for the last stage of the high-speed transmitter output cell (HS_OUT) as shown in Figure 10. Due to high current transitions, this VCC should be well bypassed to a ground plane. High-Speed Supply: Normally 3.3 volts. Used by the transmitter side for the high-speed circuitry. Noise on this line should be minimized for best operation. TTL Power Supply: Normally 3.3 volts. Used for all TTL transmitter input buffer cells. VCC* users that want full control during the frequency acquisition process. VCC Transceiver Power Supply Bypass and Loop Filter Capacitors RXCAP1 VCC_RXA GND_RXA VCC_RXHS VCC_RXHS GND_RXHS GND VCC_RX VCC_TXECL VCC_TX GND_TXTTL GND_TXHS VCC_TXHS CPLLR RXCAP0 GND_RXTTL VCC_TXTTL VCC_RXTTL VCC TOP VIEW VCC_TXTTL GND_RXTTL GND VCC_RX VCC_TX GND TXCAP0 VCC_TXA TXCAP1 VCC_RX VCC_RXTTL VCC_RXTTL GND_TXTTL GND_TXA GND_RXTTL CPLLT VCC* * SUPPLY VOLTAGE INTO VCC_RXA AND VCC_TXA SHOULD BE FROM A LOW NOISE SOURCE. ALL BYPASS CAPACITORS AND PLL FILTER CAPACITORS ARE 0.1 µF. Figure 12. Power Supply Bypass. Start-up Procedure: The transceiver start-up procedure(s) use the following conditions: VCC = +3.3 V ± 5% and REFCLK = 106.25 MHz ± 100 ppm. Auto-Lock Used Exclusively Set -LCKREF = 1 and apply valid data using a balanced code such as 8B/10B. Frequency lock occurs within 500 µs. After frequency lock, phase lock occurs within 2500 bit times. Bypass capacitors should be used and placed as close as possible to the appropriate power supply pins of the HDMP-1536/46 as shown on the schematic of Figure 12. All bypass chip capacitors are 0.1 µF. The VCC_RXA and VCC_TXA pins are the analog power supply pins for the PLL sections. The voltage into these pins should be clean with minimum noise. The PLL loop filter capacitors and their pin locations are also shown on Figure 12. Notice that only two capacitors are required: CPLLT for the transmitter and CPLLR for the receiver. Nominal capacitance is 0.1 µF. The voltage across the capacitors is on the order of 1 volt, so the capacitor can be a low voltage type and physically small. The PLL capacitors are placed physically close to the appropriate pins on the HDMP1536/46. Keeping the lines short will prevent them from picking up stray noise from surrounding lines or components. User Controlled Set -LCKREF = 0 for at least 500 µs (frequency lock will occur within 500 µs). After valid 8B/10B data is applied to the Rx input, set -LCKREF=1. Phase lock will occur within 2500 bit times. In this case, asserting -LCKREF = 0 forces the Rx PLL to fully phase and frequency lock onto the reference clock (REFCLK) disregarding the serial data stream completely. Asserting -LCKREF = 0 is an option for 709 Package Information Item Package Material Lead Finish Material Lead Finish Thickness Lead Coplanarity Details Plastic 85% Tin, 15% Lead 300-800 µm HDMP-1536 HDMP-1546 0.08 mm max. 0.10 mm max. Mechanical Dimensions PIN #1 ID 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 2 3 4 5 6 7 8 9 48 47 46 45 44 43 42 41 40 HDMP-15x6 A1 A2 TOP VIEW 10 39 11 38 12 37 13 36 14 35 15 34 16 33 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 B4 B1 A1 B5 B2 B3 A2 C1 C3 C2 Part Number A1 A2 B1 B2 B3 B4 B5 C1 C2 C3 HDMP-1536 10.00 13.20 0.22 0.50 0.88 0.17 0.25 2.00 0.25 min. 2.45 HDMP-1546 14.00 17.20 0.35 0.80 0.88 0.17 0.25 2.00 0.25 max. 2.35 Tolerance ± 0.10 ± 0.25 ± 0.05 Basic +0.15 -0.10 Figure 13. Mechanical Dimensions of HDMP-1536/46. 710 max. +0.10/-0.05 max.