> ## Appendix A. Specifications

> Appendix A provides the specifications for the RabbitLink and describes the conformal coating.

> ### A.1 Electrical and Mechanical Specifications

> Figure A-1 shows the mechanical dimensions for the RabbitLink.

> Figure A-1. RabbitLink Dimensions

> NOTE | All measurements are in inches followed by millimeters enclosed in parentheses.

> Table A-1 lists the electrical, mechanical, and environmental specifications for the RabbitLink.

> Table A-1. RabbitLink Specifications
> Parameter | Specification
> Board Size | 3.43" × 4.15" × 0.80" (87 mm × 105 mm × 20 mm)
> Connectors | one RJ-45 (Ethernet) two 2 × 5, 2 mm pitch (serial programming) one contact power jack for AC adpater one 2-terminal screw connector (18 to 26 AWG wire ) for wired-in power supply
> Ethernet Interface | Direct connection to 10BaseT Ethernet networks via RJ-45 connection
> Temperature | -40°C to +70°C
> Humidity | 5% to 95%, noncondensing
> External Input Voltage | 9 V to 40 V DC
> Current | `44 mA at 24 V, 84 mA at 12 V (typical)`
> Onboard Voltage Regulator | Surface-mount switching regulator sources 5 V at 1 A
> Microprocessor | Rabbit 2000`TM`
> Clock | 22.1 MHz
> SRAM | 128K, surface mount
> Flash EPROM | 256K for program plus 256K for data
> Serial Ports | 2 CMOS-compatible serial programming ports
> Serial Rate | Maximum asynchronous 345,600 bps Maximum synchronous 142,700 bps
> Watchdog/Supervisor | Yes
> Time/Date Clock | Yes
> Backup Battery | No

> ### A.2 Conformal Coating

> The areas around the crystal oscillator and the battery backup circuit on the RabbitLink have had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated areas are shown in Figure A-2. The conformal coating protects these high-impedance circuits from the effects of moisture and contaiminants over time.

> Figure A-2. RabbitLink Areas Receiving Conformal Coating

> Any components in the conformally coated area may be replaced using standard soldering procedures for surface-mounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants.

> NOTE | For more information on conformal coatings, refer to Rabbit Semiconductor Technical Note 303, `Conformal Coatings`.

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