Maxim Integrated Products 1

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1 9-879; Rev 0; /00 MAX70 Evaluation Kit General Description The MAX70 evaluation kit (EV kit) combines Maxim s multiprotocol clock/data transceiver (MAX70), control transceiver (MAX7), and cable terminator (MAX7) chips. This chipset forms a complete software-selectable data terminal equipment (DTE) or data communications equipment (DCE) interface port. The MAX70, MAX7, and MAX7 chipset supports V.8 (RS-), V. (RS-449/V.6, EIA-50, EIA- 50A, X.), and V.5 protocols. Compliance for NET, NET, TBR-, and TBR- has been certified by TUV Telecom Services, Inc. Internal charge pumps allow this kit to operate from a single +.V supply. The MAX70 EV kit was designed to take advantage of the chipset s flow-through pinout. This kit includes a 40-pin header (logic signals), a female DB5 connector (protocol signals), three SMA connectors (high-speed logic signals), and scope probe connectors for measuring the high-speed data signals (logic and protocol signals). DESIGNATION QTY DESCRIPTION C, C, C5, C6, C7, C0 6 C, C4, C8, C9 4 C, C, C C4, C5, C7 C6 D, D, D, D5, D6, D9 D4, D7, D8, D0, D, D.µF, 0V X7R ceramic capacitors (06) Taiyo Yuden LMK6BJ5ML.0µF, X5R ceramic capacitors (0805) Taiyo Yuden LMKBJ05MG 00pF ceramic capacitors (0805) 0.µF ceramic capacitors (0805) 47µF, 6.V tantalum capacitor AVX TAJD476M006 6 Red LEDs 6 Green LEDs Features Industry s First Single +.V Supply Multiprotocol Chipset Industry s First Multiprotocol Chipset with True Failsafe Receivers Programmable Transceiver Supports V.8 (RS-) V. (RS-449/V.6, EIA-50, EIA-50A, X.) V.5 Certified TBR- and TBR- Compliant Certified NET and NET Compliant Programmable Cable Termination (MAX7) Receiver Control Line Deglitching Fully Assembled and Tested PART MAX70EVKIT Ordering Information TEMP. RANGE 0 C to +70 C Component List DESIGNATION QTY DESCRIPTION D D6 4 Yellow LEDs JU JU7, JU 8 -pin headers JU8 JU, JU4 JU7, JU9 9 -pin headers None 7 Shunts J J 40-pin header ( 0) 0.in center DB5 right-angle female connector AMP J, J4, J5 SMA connectors (PC edge mount) EFJohnson R, R, R 49.9Ω ±% resistors (0805) R8 R 6 ±5% resistors (0805) Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at , or visit Maxim s website at

2 MAX70 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION RXD/TXD, RXC/SCTE, TXC/N/A, N/A/TXC, SCTE/RXC, TXD/RXD, RXDA/TXDA, RXDB/TXDB, RXCA/SCTEA, RXCB/SCTEB, TXCA/TXCA, TXCB/TXCB, SCTEA/RXCA, SCTEB/RXCB, TXDA/RXDA, TXDB/RXDB 6 U U Scope probe connectors (top mount) Specialty Conn JR5- MAX70CAI (clock/data transceiver) (8 SSOP) MAX7CAI (control transceiver) (8 SSOP) U MAX7CAI (terminator) (8 SSOP) U4, U5 74HC40 (LED inverting drivers) Quick Start The MAX70 EV kit is extremely flexible and has several settings for both the ICs as well as the board. The ICs have been put into no-cable mode, as the default mode. In no-cable mode the user is able to program the desired protocol with an external controller connected to the 40-pin header. The one exception is the INVERT signal, which does not have an internal pullup and is connected as a logic low for the default setting. The default mode settings are shown in Tables 4. By default, the SMA connectors (J, J4, and J5) are terminated with 50Ω and the control transmitter input lines are all tied low. ) Connect a single +.V ±5% power supply to VCC and GND located at the lower-left corner of the MAX70 EV kit board. ) The yellow LEDs indicate the protocol mode of the chipset. The LEDs will light when the corresponding signal is a logic high. Verify that all yellow LEDs light, indicating no-cable mode. All board labels, including all of the labels for the LEDs, follow the same label format. The board label format includes a top label which corresponds to DCE mode, and a bottom label which corresponds to DTE mode. ) The green LEDs are attached to the receiver logic outputs of the MAX70 and MAX7. The LEDs will light when the receiver logic outputs are a logic high. Verify that all green LEDs light when no signals are attached to the DB5 connector. Note: The receivers have the true fail-safe feature allowing zero differential voltage to be a valid state, which forces the receiver outputs high. 4) The red LEDs are attached to the transmitter logic inputs of the MAX70 and MAX7. The LEDs will light when the transmitter logic inputs are a logic high. Verify that none of the red LEDs light when no signals are connected to the 40-pin header. Detailed Description The MAX70 EV kit was designed to take advantage of the chipset s flow-through pinout. The logic signals have all been routed to the 40-pin header (located on the left side of the EV kit board), and the protocol signals have all been routed to the female DB5 connector (located on the right side of the board). Various connectors have been added to the MAX70 EV kit to aid in taking quality measurements. Leave JU9 unconnected when measuring the supply current of the chipset. Scope probe connectors have been added to measure the high-speed signals of the transmitter and receiver inputs and outputs of the MAX70. The scope probe connectors located on the left side of the board are connected to the logic input and output signals. The scope probe connectors located on the right side of the board are connected to the protocol input and output signals. Three SMA connectors also have been provided for driving the MAX70 s highspeed transmitter inputs. The 6 LEDs across the top of the board are logic indicators. The red LEDs indicate the state of the transmitter inputs, the green LEDs indicate the state of the receiver outputs, and the yellow LEDs indicate the state of the protocol and the protocol termination modes of the MAX70 and MAX7. The LEDs will light up when their corresponding signals are logic high.

3 MAX70 Evaluation Kit Table. MAX70 Default Mode MODE M M M0 DCE/DTE T T T R R R No cable Z Z Z Z Z Z Z = High impedance. Note: Shaded areas share a single IC pin. Table. MAX7 Default Mode MODE M M M0 DCE/DTE T T T R R R No cable Z Z Z Z Z Z Z = High Impedance. Note: Shaded areas share a single IC pin. Table. MAX7 R4/T4 Default Mode Z = High impedance. MODE M M M0 DCE/DTE INVERT T4 R4 No cable 0 Z Z Table 4. MAX7 Default Termination Mode MODE M M M0 DCE/DTE INVERT R R R R4 R5 No cable 0 V. V. V. V. V. Configuration The following is a step-by-step procedure to configure the MAX70 EV kit. The MAX70 EV kit is extremely flexible and has several settings for both the ICs, as well as the board. The logic signals have all been routed to the 40-pin header on the left side of the board. The protocol signals have all been routed to the female DB5 connector on the right side of the board. The chipset protocol modes can be configured to support V.8 (RS-), V. (RS-449/V.6, EIA-50, EIA- 50A, X.), and V.5 protocols. All chipset logic inputs, LED power, and shield ground connection are jumper selectable. The board includes SMA connectors (J, J4, and J5) with optional 50Ω termination. The board settings will be separated in the following sections: chipset protocol modes, clock/data transmitter input settings, control transmitter input settings, SMA termination, and power/ground. ) Connect a single +.V ±5% power supply to VCC and GND located at the lower-left corner of the MAX70 EV kit board. ) Chipset protocol modes: View the desired chipset protocol mode using the MAX70, MAX7, and MAX7 selection mode tables (Tables 5 8). Connect the jumpers to the corresponding state depending on whether the mode lines will be controlled by an external controller or pin-strapped to a known state using Tables 9 and 0. Unlike the other IC protocol mode lines (M, M, M0, and DCE/DTE), the INVERT line does not have a pullup.

4 MAX70 Evaluation Kit ) Clock/data transmitter input settings: Connect the clock/data jumpers to the corresponding state using Table. Force the inputs of all unused transmitters low so their corresponding LED indicators will be off. 4) Control transmitter input settings: Connect the control jumpers to the corresponding state using Table. Force the inputs of all unused transmitters low so their corresponding LED indicators will be off. 5) SMA termination: Connect the termination jumpers, depending on whether the signal source needs to be terminated Table 5. MAX70 Mode Selection with 50Ω, to the corresponding state using Table. Leave unused transmitter input lines terminated so the line is pulled down in a known state. When using SMA termination, avoid connecting JU, JU, and JU to VCC. 6) Power/ground: Connect the power and ground jumpers according to the desired operation using Table 4. Leave JU9 unconnected (open) when measuring the supply current of the chipset. MODE M M M0 DCE/DTE T T T R R R V V. V. Z V. V. V. RS-50A V. V. Z V. V. V. RS V. V. Z V. V. V. X. 0 0 V. V. Z V. V. V. V V.5 V.5 Z V.5 V.5 V.5 RS-449/V V. V. Z V. V. V. V.8/RS- 0 0 V.8 V.8 Z V.8 V.8 V.8 No cable 0 Z Z Z Z Z Z V V. V. V. Z V. V. RS-50A 0 0 V. V. V. Z V. V. RS V. V. V. Z V. V. X. 0 V. V. V. Z V. V. V V.5 V.5 V.5 Z V.5 V.5 RS-449/V.6 0 V. V. V. Z V. V. V.8/RS- 0 V.8 V.8 V.8 Z V.8 V.8 No cable Z Z Z Z Z Z Z = High impedance. Note: Shaded areas share a single IC pin. 4

5 MAX70 Evaluation Kit Table 6. MAX7 Mode Selection MODE M M M0 DCE/DTE T T T R R R V V. V. Z V. V. V. RS-50A V. V.0 Z V. V.0 V. RS V. V. Z V. V. V. X. 0 0 V. V. Z V. V. V. V V.8 V.8 Z V.8 V.8 V.8 RS-449/V V. V. Z V. V. V. V.8/RS- 0 0 V.8 V.8 Z V.8 V.8 V.8 No cable 0 Z Z Z Z Z Z V V. V. V. Z V. V. RS-50A 0 0 V. V.0 V. Z V.0 V. RS V. V. V. Z V. V. X. 0 V. V. V. Z V. V. V V.8 V.8 V.8 Z V.8 V.8 RS-449/V.6 0 V. V. V. Z V. V. V.8/RS- 0 V.8 V.8 V.8 Z V.8 V.8 No cable Z Z Z Z Z Z Z = High impedance. Note: Shaded areas share a single IC pin. 5

6 MAX70 Evaluation Kit Table 7. MAX7 R4/T4 Mode Selection MODE M M M0 DCE/DTE INVERT T4 R4 V Z V.0 RS-50A Z V.0 RS Z V.0 X Z V.0 V Z V.8 RS-449/V Z V.0 V.8/RS Z V.8 No cable 0 0 Z Z V V.0 Z RS-50A V.0 Z RS V.0 Z X. 0 0 V.0 Z V V.8 Z RS-449/V V.0 Z V.8/RS- 0 0 V.8 Z No cable 0 Z Z V V.0 Z RS-50A V.0 Z RS V.0 Z X. 0 0 V.0 Z V V.8 Z RS-449/V V.0 Z V.8/RS- 0 0 V.8 Z No cable 0 Z Z V Z V.0 RS-50A 0 0 Z V.0 RS Z V.0 X. 0 Z V.0 V Z V.8 RS-449/V.6 0 Z V.0 V.8/RS- 0 Z V.8 No cable Z Z Z = High impedance. 6

7 MAX70 Evaluation Kit Table 8. MAX7 Termination Mode Selection MODE M M M0 DCE/DTE INVERT R R R R4 R5 V. (Unterminated) X Z Z Z Z Z RS-50A X Z Z V. V. V. RS X Z Z V. V. V. X. 0 0 X Z Z V. V. V. V X V.5 V.5 V.5 V.5 V.5 RS-449/V X Z Z V. V. V. V.8/RS- 0 0 X Z Z Z Z Z No cable 0 X V. V. V. V. V. V. (Unterminated) X Z Z Z Z Z RS-50A 0 0 X Z Z Z V. V. RS X Z Z Z V. V. X. 0 X Z Z Z V. V. V X V.5 V.5 V.5 V.5 V.5 RS-449/V.6 0 X Z Z Z V. V. V.8/RS- 0 X Z Z Z Z Z No cable X V. V. V. V. V. Z = High impedance. Table 9. Chipset Protocol Mode Jumper Settings JUMPER SIGNAL (BUS) STATE FUNCTION Logic high. (Internal pullup in IC.) DCE/DTE line can be driven by Open* JU4 DCE/DTE signal applied to J-0 (40-pin header). Closed Logic low Logic high. (Internal pullup in IC.) M line can be driven by signal Open* JU5 M applied to J- (40-pin header). Closed Logic low Logic high. (Internal pullup in IC.) M line can be driven by signal Open* JU6 M applied to J-4 (40-pin header). Closed Logic low Logic high. (Internal pullup in IC.) M0 line can be driven by signal Open* JU7 M0 applied to J-6 (40-pin header). Closed Logic low *Default jumper setting. 7

8 MAX70 Evaluation Kit Table 0. Invert Mode Jumper Settings JUMPER SIGNAL STATE FUNCTION -* Logic high JU INVERT - Logic low Open Apply signal to J-8 (40-pin header) *Default jumper setting. Table. Clock/Data Transmitter Input Jumper Settings JUMPER DCE/DTE STATE FUNCTION - Logic high JU RXD/TXD - Logic low Open* Apply signal to SMA connector J - Logic high JU RXC/SCTE - Logic low Open* Apply signal to SMA connector J4 - Logic high JU TXC/N/A - Logic low Open* Apply signal to SMA connector J5 *Default jumper setting. Table. Control Transmitter Input Jumper Settings JUMPER DCE/DTE STATE FUNCTION - Logic high JU4 CTS/RTS -* Logic low Open Apply signal to J-4 (40-pin header) - Logic high JU5 DSR/DTR -* Logic low Open Apply signal to J-6 (40-pin header) - Logic high JU6 DCD/N/A -* Logic low Open Apply signal to J-8 (40-pin header) - Logic high JU7 LL/N/A -* Logic low Open Apply signal to J-6 (40-pin header) *Default jumper setting. 8

9 MAX70 Evaluation Kit Table. Termination settings JUMPER DCE/DTE STATE FUNCTION JU8 RXD/TXD Open Unterminated Closed* Terminated with 50Ω JU9 RXC/SCTE Open Unterminated Closed* Terminated with 50Ω JU0 TXC/ N/A Open Unterminated Closed* Terminated with 50Ω *Default jumper setting. Table 4. Power/Ground Jumper Settings JUMPER NAME STATE FUNCTION JU SHIELD Open DB5 cable shield (J-) disconnected from signal ground Closed* DB5 cable shield (J-) shorted to signal ground JU9 LED ANODE Open LED anode is floating Closed* LED anode is connected to VCC *Default jumper setting. 9

10 MAX70 Evaluation Kit 0 Figure. MAX70 EV Kit Schematic (Sheet of ) J5 6 V+ C+ C- C+ C- V- TIN TIN TIN ROUT ROUT ROUT RXD/TXD RXC/SCTE TXC/N/A N/A/TXC SCTE/RXC TXD/RXD MO M M DCE/DTE C.0µF C.µF C5.µF C9.0µF C4.0µF C.µF J J 4 J 6 J 8 J 0 J Ω JU8 49.9Ω JU9 JU JU VCC JU JU 49.9Ω JU0 JU7 M INVERT DCE/DTE M M0 JU6 JU5 JU4 TOUTA TOUTB TOUTA TOUTB TOUTA/RINA TOUTB/RINB RINB RINA RINA RINB J4 J SCOPE PROBES CONNECTORS SMA CONNECTORS J- JU J J 4 J 4 J J 5 J J 9 J 7 J J 6 RXDA/TXDA RXDB/TXDB RXCA/SCTEA RXCB/SCTEB TXCA/TXCA TXCB/TXCB SCTEB/RXCB SCTEA/RXCA TXDA/RXDA TXDB/RXDB MAX70 6 V+ VCC C+ C- C+ C- V- TIN TIN TIN ROUT ROUT ROUT CTS/RTS DSR/DTR DCD/N/A N/A/DCD DTR/DSR RTS/CTS MO M M DCE/DTE C8.0µF C6.µF C0.µF C7.µF J 4 J 6 J 8 J 0 J J JU4 JU5 JU6 TOUTA TOUTB TOUTA TOUTB TOUTA/RINA TOUTB/RINB RINB RINA RINA RINB J 4 J 9 J 0 J J 8 J 0 J J 6 J 5 J J-7 J- J-5 N/C N/C MAX7 MAX7 9, 8, GND 7 T4IN VCC R4OUT V+ V- RC RC RC M0 LL/N/A N/A/LL M M INVERT 6 C 00pF C 00pF C 00pF J 8 J 0 J 6 J 8 J J 4 J JU7 RA RB RA RB RA RB R4A R4B R5A R5B T4OUT R4INA DCE/DTE J 8 J J J 5 J 7 J 9 J J J 5 J 7 J 9 J J J 5 J 7 J 9 J J J 5 J 7 J 9 J 40 GND GND VCC R R R U U U C7 0.µF C6 47µF VCC

11 MAX70 Evaluation Kit RXD/TXD RXC/SCTE TXC/N/A N/A/TXC DSR/DTR CTS/RTS TXD/RXD SCTE/RXC U4-A 74HC40 U4-B 74HC C4 0.µF R8 R9 R0 R R R4 R5 Figure. MAX70 EV Kit Schematic (Sheet of ) 0 D D D D5 D6 D7 D8 JU9 DCD/N/A N/A/DCD DTR/DSR VCC 4 U5-A 6 8 RTS/CTS R 0 D4 0 74HC40 DCE/DTE M M M U5-B 74HC C5 0.µF R6 R7 R8 R9 R0 R R R D9 D0 D D D D4 D5 D6

12 MAX70 Evaluation Kit.0".0" Figure. MAX70 EV Kit Component Placement Guide Top Layer (Silkscreen) Figure. MAX70 EV Kit Component Placement Guide Top Layer (Component Side).0" Figure 4. MAX70 EV Kit PC Board Layout Inner Layer (GND)

13 MAX70 Evaluation Kit.0".0" Figure 5. MAX70 EV Kit PC Board Layout Inner Layer (VCC) Figure 6. MAX70 EV Kit PC Board Layout Bottom Layer (Solder Side) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 0 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

PART. Maxim Integrated Products 1

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