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AN1168.1
ISL5585EVAL4 Evaluation Board User’s Guide
Introduction
The ISL5585EVAL4 evaluation board provides a complete
PCM to 2W Ringing SLIC/CODEC line card for the evaluation
of the RSLIC18 family of 5V and 3.3V Ringing SLICs (RSLIC).
The evaluation board is designed to accommodate both the
HC55185 5V and the ISL5585 3.3V and includes companion
5V and 3.3V CODECs from Winbond.
Key Features
The evaluation board is designed to allow individual testing
of the RSLIC, or the CODEC. With the correct choice of
jumpers, the analog interface between the RSLIC and
CODEC can be established, allowing a complete A-D and D-
A evaluation of the RSLIC - CODEC chip-set. The digital
interface has the capability of direct connection to an
external PCM bus, or to a PCM4 for measurement. The
evaluation board includes an on-board oscillator/counter to
generate the CODEC MCLK and frame sync signals so that 2
evaluation boards can share a common PCM bus to
implement a full-duplex A-A evaluation system.
The following telephony BORSCHT functions are supported
by the evaluation board:
• Battery Feed including DC loop feed and current limit
• Overvoltage protection
• Ring signal amplification and 2W injection
• Loop supervision including loop start, ground start and
ring trip
• CODEC analog to PCM transmission with selectable A-
law and mu-law coding
• Jumper selectable AC and hybrid gain compensation
for the user’s choice of the 5V or 3.3V SLIC/CODEC
chip-sets
• Digital and analog loopback
Related Documentation
• HC55185 5V RSLIC data sheet (Intersil)
• ISL5585 3.3V RSLIC data sheet (Intersil)
• W6810 5V single channel CODEC (Winbond)
• W68131 3.3V single channel CODEC (Winbond)
• AN9842: Implementing Tip and Ring Protection
Circuitry for the HC55185 Ringing SLIC Family (Intersil)
Scope and Organization
The scope of the user’s guide is limited to the operation of
the evaluation board that pertains to the PCM to 2W AC
transmission circuits. Theory of operation and the AC
transmission design equations are included to enable the
user to adapt the performance to meet his specific needs.
The operation of the remaining BORSCHT functions
supported by the evaluation board can be found in the
document references.
The user’s guide is organized into 3 sections as follows:
Section 1: Description, Set-up and Operation
This section contains information to familiarize the user with
the physical layout, jumper and connector descriptions,
external power source requirements, I/O descriptions, and a
description of the evaluation board test capability.
Section 2: DC Functionality and AC Test Set-up
This section contains test instructions for the following:
• DC functional tests after power-up,
• individual RSLIC and CODEC AC transmission testing
• half-channel PCM to 2W testing.
• dual-board, full-channel A-A test set-up
Section 3: AC Transmission Theory and Design
This section contains the AC transmission theory and the
design equations for the RSLIC/CODEC PCM to 2W half-
channel implemented on the evaluation board. Appendices
A and B contain the AC gain block diagram and equations
followed by the evaluation board schematic and BOM.
Application Note
Getting Started
Your evaluation kit contains the following hardware.
1. One ISL5585EVAL evaluation board.
2. 3.3V RSLIC/CODEC chip-set: I W68131.
3. 5V RSLIC/CODEC chip-set: H W6810.
4. One PLCC extraction tool.
5. One cable assembly with multi colored conductors.
6. One cable assembly with solid white conductors.
7. PCB jumpers.
The evaluation board should have the same appearance as
shown in Figure 1.
SECTION 1: Description, Set-up, and Operation
January 24, 2005
RSLIC18™ is a trademark of Intersil Corporation.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
