SP3508EB SIPEX | Alldatasheet

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Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation The SP3508 Evaluation Board is designed to analyze the SP3508 multi-protocol transceivers. The evaluation board provides access points to all of the driver and receiver I/O pins so that the user can measure electrical characteristics and waveforms of each signal. The SP3508 Evaluation Board also includes a DB-25 serial port connector which is configured to a EIA-530 pinout. This allows easy connections to other DTE or DCE systems as well as network analyzers. The evaluation board also has a set of jumpers to allow the user to select the mode of operation and test the data latch feature. Furthermore, the SP3508 Evaluation Board provides the means to test both local and remote driver/receiver Loopback as well as evaluate the SP3508 in a DCE or DTE configuration. This Manual is split into sections to give the user the information necessary to perform a thorough evaluation of the SP3508. The Board Schematic and Layout section describes the I/O pins, the jumpers and the other components used on the evaluation board. The board schematic, layout diagram and DB-25 connector are also covered in the Board Schematic and Layout section. The Using the SP3508 Evaluation Board section details the configuration of the SP3508 evaluation board for parametric testing.

DESCRIPTION

FEATURES

■ Easy Evaluation of SP3508 Multi-Protocol Transceiver ■ Eight (8) Drivers and Eight (8) Receivers ■ Current Mode V.35 Drivers ■ Internal Line or Digital Loopback ■ Internal Transceiver Termination Resistors for V.11 and V.35 ■ Termination Network Disable Option ■ Fast 20Mbps Differential Transmission Rates ■ Adheres to CTR1/CTR2 Compliancy Requirements ■ Interface modes: RS-232(V.28) EIA-530(V.10&V.11) X.21(V.11) EIA-530A(V.10&V.11)

Figure 2. RS-232 & EIA530 Connector (ISO 2110), DTE

  1. The SP3508 Evaluation Board has been

access to all inputs and outputs under test.

  1. Figure 1 is a schematic of the evaluation
  2. Figure 3 to Figure 6 shows the layout of

the SP3508 Evaluation Board. probe points for the inputs and outputs.

  1. At the left of the board is a set of jumpers.
  2. Also located on the SP3508 evaluation
  3. 1 Pomona BNC female connector is
  4. Figure 2 shows a RS-232 & EIA530 DB-
  5. Table 1 shows the pinout of the DB-25

tion analyzer such as the TTC Firebird 6000.

Note: All six charge pump caps are located next to the DUT. Control pins (D0,D1, D2), / LOOPBACK, / D_LATCH, and TERMOFF are also included. Figure 3. SP3508 Evaluation Board Layout

Figure 6. SP3508 Evaluation Board Layout Bottom Layer

Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation TABLE 1. EIA-232 EIA-530 EIA-449 V.35 X.21 Signal Name source Mnemonic Pin Mnemonic Pin Mnemonic Pin Mnemonic Pin Mnemonic Pin Transmitted data DTE BA 2 BA(A) 2 SD(A) 4 103 P Circuit T(A) 2 BA(B) 14 SD(B) 22 103 S Circuit T(B) 9 Received Data DCE BB 3 BB(A) 3 RD(A) 6 104 R Circuit R(A) 4 BB(B) 16 RD(B) 24 104 T Circuit R(B) 11 Request To Send DTE CA 4 CA(A) 4 RS(A) 7 105 C Circuit C(A) 3 CA(B) 19 RS(B) 25 Circuit C(B) 10 Clear To Send DCE CB 5 CB(A) 5 CS(A) 9 106 D Circuit I(A) 5 CB(B) 13 CS(B) 27 Circuit I(B) 12 DCE Ready (DSR) DCE CC 6 CC(A) 6 DM(A) 11 107 E CC(B) 22 DM(B) 29 DTE Ready (DTR) DTE CD 20 CD(A) 20 TR(A) 12 108 H* CD(B) 23 TR(B) 30 Signal Ground — AB 7 AB 7 SG 19 102 B Circuit G 8 Recv. Line Sig. DCE CF 8 CF(A) 8 RR(A) 13 109 F Det. (DCD) CF(B) 10 RR(B) 31 Trans. Sig. DCE DB 15 DB(A) 15 ST(A) 5 114 Y Circuit S(A) 6 Elemt. Timing DB(B) 12 ST(B) 23 114 AA Circuit S(B) 13 Recv. Sig. DTE RL 17 DD(A) 17 RT(A) 8 115 V Circuit B(A) 7 Elemt. Timing DD(B) 9 RT(B) 26 115 X Circuit B(B) 14 Local Loopback DCE DD 18 LL 18 LL 10 141 L* Remote Loopback DTE LL 21 RL 21 RL 14 140 N* Ring Indicator DCE CE 22 — — — — 125 J* Trans. Sig. DTE DA 24 DA(A) 24 TT(A) 17 113 U* Circuit X(A)** 7 Elemt. Timing DA(B) 11 TT(B) 35 113 W* Circuit X(B)** 14 Test Mode DCE TM 25 TM 25 TM 18 142 NN* * Optional signals ** Only one of the two x.21 signals, Circuit B or X, can be implemented and active at one time.

Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation Recommended Equipment

  • Oscilloscope
  • Digital multimeter
  • Signal Generator capable of >40MHz
  • Communications Analyzer (such as Firebird 6000) Parametric Evaluation Located on the board are two pins identified as VCC and SIGNAL GND. Connect VCC to a +3.3V DC supply. If possible limit the supply current to 0.5 to 1.0 Amps. Be sure to have power off when connecting the supply to the board. SP3508 Decoder The SP3508 uses a 3 bit decoder to desig- nate the protocol selected. There is also a decoder latch pin available. Table 2 and Table 3 show the decoder modes for the driver and receiver. Upon power up the latch pin needs to be in a transparent state (logic low or floating) or the SP3508 will be in an unknown state. Note that D0, D1, and D2 set as logic high will put the device shutdown overriding all individual enable/ disable lines and the drivers outputs and receiver inputs will tri-state. In shutdown mode the termination resistors also discon- nect. Driver Evaluation Each driver has an internal pull-up; there- fore, it is in a defined state when the input is open. Connect a system clock or a signal generator with a TTL-level output and the appropriate frequency within the accept- able range of the driver to the input BNC connector. Set the jumper to the desired driver input to be evaluated. There is an individual enable line for each driver that can be used to tri-state the driver. Each enable line has an internal pull up or pull down to insure the driver is enabled if the USING THE EVALUATION BOARD enable pin is not connected or floating. Set the appropriate jumper to enable the driver under test. Once the power is on and the driver input receives a signal, the driver outputs can be analyzed with an oscillo- scope or a digital multimeter. Mode selec- tion can be performed at any time by chang- ing the jumper settings for the 3 bit decoder (D0-D2). The appropriate termination for the driver under test can be added to driver output and tied to the ground bus. Receiver Evaluation The SP3508 receivers have internal termi- nation appropriate for V.35 and RS-422 modes (refer to the SP3508 datasheet for more detail on the receiver termination). This is activated when the receiver is set to act as a V.11 receiver (see Table 3) and the TERM_OFF pin is logic “0”. Each receiver has a fail-safe feature that outputs a logic “1” when the receiver is open, terminated but open, or shorted together. There is an indi- vidual enable line for each receiver that can be used to tri-state the driver. Each enable line has an internal pull up or pull down to insure the receiver is enabled if the enable pin is not connected or floating. Set the appropriate jumper to enable the receiver under test. The mode selection can be performed at any time after power up by changing the state of the 3 bit decoder (D0- D2). To evaluate the receiver the appropri- ate input signal needs to be applied. This can be accomplished by providing a signal from an external source or use the SP3508 driver output and jumper it to the receiver input. For single ended receivers, tie the active driver output to the active receiver input. For differential drivers, tie the “A” driver output to the “A” receiver input and the “B” driver output to the “B” receiver input. Using the TTL signal on the driver input will allow the user to analyze receiver levels and timing characteristics.

Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation USING THE EVALUATION BOARD: Continued Driver/Receiver Remote Loopback The following example uses the ST driver looped back into the TxC receiver. Use the 3 bit decoder to configure the SP3508 for the desired protocol. Connect a jumper cable between the ST(a) pin and the TxC(a) pin. If your mode select is set for a differential driver/receiver, then also connect a jumper cable between the ST(b) pin and the TxC(b) pin. The next step is to connect a signal generator to the ST input pin through BNC input connector. The signal generator out- put must be a TTL-level output at a fre- quency within the acceptable range of the driver mode under test. Be sure that the jumper settings of STEN signal and TxCEN signal are set to enable the ST driver and TxC receiver. The driver outputs are now connected back to the receiver inputs so that the driver input to receiver output can be examined. This configuration is similar for all other drivers. Driver/Receiver Local Loopback The SP3508 has the ability to provide an internal loopback. This feature is invoked by a logic “0” on the /LOOPBACK pin. The driver input and receiver output characteris- tics adhere to the appropriate specifications outlined in the datasheet under loopback conditions. The /LOOPBACK pin has an internal pull-up resistor so that the SP3508 defaults to normal operation during power- up or if the pin is left floating. DCE DTE selectable configuration

  • Configure the decoder for the desired mode.
  • The SP3508 evaluation board has jumper setup to allow for the evaluation of a select- able DCE DTE configuration.
  • Set the STEN and RRCEN to Logic “0”. This will disable the ST and RRC driver outputs. (Refer to the Jumper Setting Guide in the next section)
  • Set the /TxCEN and /RRTEN to Logic “1”. This will disable the TxC and RRT receiver inputs. (Refer to the Jumper Setting Guide in the next section)
  • Use an external wire to tie the ST driver outputs to the TxC Receiver inputs.
  • Use an external wire to tie the RRC driver outputs to the RRT receiver inputs.
  • To enable a DTE configuration, set the STEN and RRCEN to Logic “1”. Be sure the TxC and RRT receivers are disabled by setting the /TxCEN and /RRTEN to Logic “1”. (Refer to the Jumper Setting Guide in the next section)
  • To enable a DCE configuration, set the / TxCEN and /RRTEN to Logic “0”. Be sure to disable the ST and RRC driver outputs by setting the STEN and RRCEN to Logic “0”. (Refer to the Jumper Setting Guide in the next section) System Level Evaluation
  • Use DB-25 Connector if the evaluation board is configured as a DTE for EIA-530 pinout. In order to connect to other DCE equipment or network analyzers ( i.e. the TTC Firebird 6000A), the RxC receiver out- put must be looped back to the TxCE driver input. The RxD output can also be looped back to the TxD input.
  • If connecting the evaluation board to a microcontroller such as the Motorola MC68360, jumper wires of the driver inputs and receiver outputs must connect to the uC’s appropriate pins.

JP52 allows the user to set the driver input to GND, VCC or external source. Figure 7. JP52 Jumper Configuration. TABLE 4. JP52 JUMPER SETTING

Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation SP3508 Pin Designation Pin Number Pin Name Description Pin Number Pin Name Description

1 GND Signal Ground 51 RT(B) RxT Non-Inverting Input

2 SDEN TxD Driver Enable Input 52 RT(A) RxT Non-Inverting Input

3 TTEN TxCE Driver Enable Input 53 TxC(B) TxC Non-Inverting Input

4 STEN ST Driver Enable Input 54 GND Signal Ground

5 RSEN RTS Driver Enable Input 55 TxC(A) TxC Inverting Input

6 TREN DTR Driver Enable Input 56 CS(B) CTS Non-Inverting Input

7 RRCEN DCD Driver Enable Input 57 CS(A) CTS Inverting Input

8 RLEN RL Driver Enable Input 58 DM(B) DSR Non-Inverting Input

9 LLEN LL Driver Enable Input 59 DM(A) DSR Inverting Input

10 RDEN RxD Receiver Enable Input 60 GNDV10 V.10 Rx Reference Node

11 RTEN RxT Receiver Enable Input 61 RRT(B) DCD DTE Non-Inverting Input

12 TxCEN TxC Receiver Enable Input 62 RRT(A) DCD DTE Non-Inverting Input

13 CSEN CTS Receiver Enable Input 63 IC RI Receiver Input

14 DMEN DSR Receiver Enable Input 64 TM(A) TM Receiver Input

15 RRTEN DCD DTE Receiver Enable Input 65 LL(A) LL Driver Output

16 ICEN RI Receiver Enable Input 66 VCC Power Supply Input

17 TMEN TM Receiver Enable Input 67 RL(A) RL Driver Output

18 D0 Mode Select Input 68 VSS1 -2xVCC Charge Pump Output

19 D1 Mode Select Input 69 C2N Charge Pump Capacitor

20 D2 Mode Select Input 70 C1N Charge Pump Capacitor

21 D_LATCH Decoder Latch Input 71 GND Signal Ground

22 TERM_OFF Termination Disable Input 72 C2P Charge Pump Capacitor

23 VCC Power Supply Input 73 VCC Power Supply Input

24 C3P Charge Pump Capacitor 74 C1P Charge Pump Capacitor

25 GND Signal Ground 75 GND Signal Ground

26 C3N Charge Pump Capacitor 76 VDD 2xVCC Charge Pump Output

27 VSS2 Minus VCC 77 RRC(B) DCD DCE Non-Inverting Output

28 AGND Signal Ground 78 VCC Power Supply Input

29 AVCC Power Supply Input 79 RRC(A) DCD DCE Inverting Output

30 LOOPBACK Loopback Mode Enable Input 80 GND Signal Ground

31 TxD TxD Driver TTL Input 81 RS(A) RTS Inverting Output

32 TxCE TxCE Driver TTL Input 82 VCC Power Supply Input

33 ST ST Driver TTL Input 83 RS(B) RTS Non-Inverting Output

34 RTS RTS Driver TTL Input 84 GND Signal Ground

35 DTR DTR Driver TTL Input 85 TR(A) DTR Inverting Output

36 DCD_DCE DCD DCE Driver TTL Input 86 VCC Power Supply Input

37 RL RL Driver TTL Input 87 TR(B) DTR Non-Inverting Output

38 LL LL Driver TTL Input 88 GND Signal Ground

39 RxD RxD Receiver TTL Output 89 ST(A) ST Inverting Output

40 RxC RxC Receiver TTLOutput 90 VCC Power Supply Input

41 TxC TxC Receiver TTL Output 91 ST(B) ST Non-Inverting Output

42 CTS CTS Receiver TTL Output 92 GND Signal Ground

43 DSR DSR Receiver TTL Output 93 TT(A) TxCE Inverting Output

44 DCD_DTE DCD DTE Receiver TTL Output 94 VCC Power Supply Input

45 RI TI Receiver TTL Output 95 TT(B) TxCE Inverting Output

46 TM TM Receiver TTL Output 96 GND Signal Ground

47 GND Signal Ground 97 SD(A) TxD Inverting Output

48 VCC Power Supply Input 98 VCC Power Supply Input

49 RD(B) RXD Non-Inverting Input 99 SD(B) TxD Non-Inverting Output

50 RD(A) RXD Inverting Input 100 VCC Power Supply Input

Rev. 8/28/03 SP3508 Evaluation Board Manual © Copyright 2003 Sipex Corporation Model TEMPERATURE Package

ORDERING INFORMATION

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Sipex Corporation Headquarters and Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com