PRELIMINARY DS3150DK Demo Kit for the DS3150 DS3/E3/STS-1 LIU www.maxim-ic.com FEATURES § § § § § § § § § § § § Small size: approximately 3" x 4" Soldered-down DS3150 in 48-pin TQFP package for best signal integrity Line-side BNC connectors for Tx+/Tx- and Rx+/Rx- differential pairs High-frequency 2:1 transformers on the transmit and receive differential pairs Carefully designed layout for all analog signal paths System-side connector for TCLK/TPOS/ TNEG, RCLK/RPOS/RNEG, MCLK, and PRBS supports external data source/sink Jumpers to control EFE, ICE, LBKS*, LBO, RMON, TDS0, TDS1/OFSEL, TESS, TTS,* and ZCSE* Jumpers to connect TCLK to DS3 oscillator, E3 oscillator or connector pin Jumpers to connect MCLK to DS3 oscillator, E3 oscillator, connector pin, VCC, or ground LEDs for DM* (red), LOS* (red), PRBS sync (green), and VDD (green) Banana jack connectors for VDD and GND support use of lab power supplies Silk-screened documentation for common hardware modes on bottom side of the board DESCRIPTION The DS3150DK is a small, self-contained evaluation kit for the DS3150 DS3/E3/STS-1 LIU. A soldered DS3150 and careful layout of the analog-signal traces ensure maximum signal integrity. Jumpers on the board allow the user to configure the DS3150 in any mode. LEDs indicate VCC present, loss of signal, transmit driver failure, and PRBS sync. The board provides BNC connectors for the line-side transmit and receive differential pairs and a header for various system-side signals. On-board oscillators serve as local timing sources for DS3 and E3 operation. All jumpers, LEDs, and connectors are clearly labeled to make the board as easy as possible to use. 1 of 12 070202 DS3150DK BOARD FLOOR PLAN Figure 1 shows the floor plan of the DS3150DK. The DS3150 is in the center of the board. The line-side BNC connectors for the Tx and Rx differential pairs are at the bottom of the board, while the system connector and configuration jumpers are at the top. The LEDs for DM*, LOS*, and PRBS are in the upper left- hand corner; the power supply connectors and power indicator LED are in the upper right. The T3 and E3 oscillators sit to the right of the DS3150. All analog signal traces were carefully designed to ensure signal integrity. Figure 1. BOARD FLOOR PLAN LOS* VDD SYSTEM CONNECTOR GND POWER JACKS LEDs PRBS DM* CONFIGURATION JUMPERS OSCILLATORS DS3150 T3 TRANSFORMERS Tx E3 Rx BNC CONNECTORS Tx Rx 2 of 12 PWR LED DS3150DK JUMPERS Configuration Inputs. The jumpers on the DS3150DK allow the user to configure the DS3150 in any of its operating modes (Figure 2). Each configuration input pin on the DS3150 has a corresponding jumper to connect the pin to VDD or GND (or leave it floating). Silk-screen labels around the jumpers show that the DS3150 configuration pins are wired to the center posts of the jumper sites. Additional board markings indicate that a VCC rail is connected to the top post of each jumper site while a GND rail is connected to the bottom posts. Jumpers JP3, JP5, JP7, JP8, JP9, JP10, JP11, JP12, JP13, and JP14 control configuration input pins on the DS3150. TCLK. On the right side of the board, jumper JP1 connects either the T3 oscillator output or the E3 oscillator output to the intermediate node OSC. Install JP1 between top and middle posts for an E3 clock or between the middle and bottom posts for a T3 clock. Install jumper JP2 to connect the DS3150 TCLK pin to the OSC node. Leave JP2 uninstalled to source TCLK from the System Connector. MCLK. Jumpers JP4 and JP6 control the DS3150 MCLK pin. Install jumper JP4 (and not JP6) to connect the DS3150 MCLK pin to the OSC node. Install jumper JP6 (and not JP4) to connect the MCLK pin to VCC or GND. Leave both JP4 and JP6 uninstalled to source MCLK from the System Connector. Figure 2. DS3150DK JUMPERS EFE, ICE, LBKS*, LBO, RMON, TDS0, TDS1/OFSEL, TESS, TTS* and ZCSE* VDD GND VDD OSC JP4 GND MCLK SYSTEM CONNECTOR TCLK SYSTEM CONNECTOR JP6 OSC JP2 E3 T3 OSC JP1 3 of 12 DS3150DK LINE-SIDE CONNECTIONS The DS3150DK implements the Tx and Rx line-interface networks recommended in the DS3150 data sheet and shown in Figure 3. To connect the DS3150 to DS3, E3, or STS-1 test equipment, connect the equipment to BNC connectors J1 and J2 using coaxial cables. To externally loopback the DS3150 from transmitter to receiver, connect J1 and J2 together through a length of cable or a cable simulator. Figure 3. DS3150DK LINE SIDE CIRCUITRY TRANSMIT T1 Tx+ VDD J1 R1 330Ω (1%) 0.1µF 1:2ct Tx- RECEIVE T2 DS3150 Rx+ J2 R2 330Ω (1%) 0.1µF 1:2ct Rx- SYSTEM CONNECTOR The 16-pin System Connector at the top of the board gives access to the following DS3150 signals: RPOS, TPOS, RNEG, TNEG, RCLK, TCLK, MCLK, and PRBS. Use the System Connector to connect the DS3150 to an external framer or other data source/sink. To configure the DS3150DK board for an external remote loopback, place TCLK-RCLK, TPOS-RPOS, and TNEG-RNEG jumpers (Figure 4). Figure 4. SYSTEM CONNECTOR RPOS TPOS GND GND RNEG GND TNEG GND RCLK GND TCLK GND MCLK GND PRBS GND POWER SUPPLY CONNECTORS Connect a 3.3V power supply across the red (VCC) and black (GND) banana jacks. When a power supply is present, the green PWR LED is lit. 4 of 12 DS3150DK BASIC DS3150DK CONFIGURATION Table 1, Table 2, and Table 3 list jumper settings for basic DS3150 configurations for T3, E3, and STS-1 modes, respectively. These example configurations provide a quick start to using the DS3150DK and may not be the proper configuration for your specific application. To set up other DS3150 configurations with the DS3150DK, refer to the DS3150 data sheet for more details about configuration pins and options. Table 1. BASIC T3 CONFIGURATION SIGNAL NAME JUMPER POSITION GND VCC ZCSE* EFE ICE LBO LBKS* MCLK TTS* RMON TDS0 TDS1 TESS JP13 JP8 JP10 JP12 JP14 JP6 JP11 JP3 JP5 JP7 JP9 SIGNAL NAME TCLK MCLK SIGNAL NAME OSC JUMPER JUMPER POSITION JUMPER JP2 JP4 JUMPER POSITION T3 JUMPER ACTION B3ZS encoder/decoder enabled Enhanced features enabled Normal RCLK, normal TCLK Cable > 225ft No loopback enabled Don’t wire MCLK high or low Enable transmit driver Disable 20dB preamp Transmit T3 AIS pattern T3 mode ACTION Source TCLK from OSC node Source MCLK from OSC node ACTION E3 JP1 5 of 12 Source OSC from T3 oscillator DS3150DK Table 2. BASIC E3 CONFIGURATION SIGNAL NAME JUMPER POSITION GND VCC ZCSE* EFE ICE LBO LBKS* MCLK TTS* RMON TDS0 TDS1 TESS SIGNAL NAME TCLK MCLK SIGNAL NAME OSC JUMPER JP13 JP8 JP10 JP12 JP14 JP6 JP11 JP3 JP5 JP7 JP9 JUMPER POSITION JUMPER JP2 JP4 JUMPER POSITION T3 E3 JUMPER JP1 6 of 12 ACTION HDB3 encoder/decoder enabled Enhanced features enabled Normal RCLK, normal TCLK Cable > 225ft No loopback enabled Don’t wire MCLK high or low Enable transmit driver Disable 20dB preamp Transmit unframed all 1’s (E3 AIS) E3 mode ACTION Source TCLK from OSC node Source MCLK from OSC node ACTION Source OSC from E3 oscillator DS3150DK Table 3. BASIC STS-1 CONFIGURATION SIGNAL NAME JUMPER POSITION GND VCC ZCSE* EFE ICE LBO LBKS* MCLK TTS* RMON TDS0 TDS1 TESS JUMPER JP13 JP8 JP10 JP12 JP14 JP6 JP11 JP3 JP5 JP7 JP9 SIGNAL NAME JUMPER POSITION JUMPER TCLK JP2 MCLK JP4 SIGNAL NAME OSC JUMPER POSITION T3 ACTION B3ZS encoder/decoder enabled Enhanced features enabled Normal RCLK, normal TCLK Cable > 225ft No loopback enabled Don’t wire MCLK high or low Enable transmit driver Disable 20dB preamp Transmit unframed all ones Float = STS-1 mode ACTION Not Installed = Source TCLK from System Connector1 Not Installed = Source MCLK from System Connector1 JUMPER ACTION JP1 Not installed = Don’t select T3 or E3 oscillator1 E3 1. The DS3150 does not have an on-board STS-1 oscillator. Apply a transmission-quality STS-1 clock to the TCLK pin on the System Connector. 7 of 12 DS3150DK BILL OF MATERIALS Table 4. BILL OF MATERIALS ITEM DESCRIPTION MANUFACTURER PART NUMBER MANUFACTURER QTY ADDITIONAL INFORMATION REF DESIGNATOR 1 3.3V Oscillator CPPX7-A5BC Cardinal Components 1 44.736MHz Frequency Y2 2 3.3V Oscillator CPPX7-A5BC Cardinal Components 1 34.368MHz Frequency Y1 3 T3/E3 SMD Transformer PE-65968 Pulse 2 T1, T2 4 Green SMD LED LN1351C-(TR) Panasonic 2 DS1, DS4 5 Red SMD LED LN1251C-(TR) Panasonic 2 DS2, DS3 6 DS3150 TQFP48 DS3150T Dallas Semiconductor 1 DS3150 7 MAX6316L MAX6316LUK26CY-T Maxim Integrated Products 1 U1 8 BNC CONN 2 J1, J2 9 Red Banana Jack 1646219 Mouser 1 VCC 10 Black Banana Jack 1646218 Mouser 1 GND 11 SMD 330Ω 3 12 SMD 68µF Cap 1 C14 13 14 SMD 350Ω SMD 100Ω 2 2 15 SMD 35Ω 5 16 SMD 300Ω 1 R11, R13 R7, R9 R10, R14, R17, R18, R19 R12 17 SMD 10kΩ 4 R3, R4, R15, R16 18 Protection Diode 1 D1 IN4001 19 Jumper 3-Pin 12 20 21 Jumper 2-Pin SMD 1µF CAP 2 3 22 SMD 0.1µF CAP 7 23 24 25 26 SMD 0.01µF CAP SMD 0.001µF CAP Mounting Connectors 16-Pin Header 8 of 12 Precision (1%) R1, R2, R5 JP1, JP3, JP5, JP6, JP7, JP8, JP9, JP10, JP11, JP12, JP13, JP14 JP2, JP4 C9, C10, C11 C1, C2, C6, C7, C8, C12, C13 3 C3, C4, C5 2 C15, C16 4 I11, I12, I13, I14 1 J3