DS10CP154A_14 Datasheet, PDF (7/20 Pages) Texas Instruments – DS10CP154A 1.5 Gbps 4x4 LVDS Crosspoint Switch

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DC Test Circuits
¼ DS10CP154
IN+
Power Supply
R
D
Power Supply
IN-
DS10CP154A
SNLS306C – AUGUST 2008 – REVISED APRIL 2013
OUT+
OUT-
V_OH
R_L
V_OL
AC Test Circuits and Timing Diagrams
Signal Generator
¼ DS10CP154
IN+
OUT+
R
D
R_L
IN-
OUT-
FUNCTIONAL DESCRIPTION
The DS10CP154A is a 1.5 Gbps 4x4 LVDS digital crosspoint switch optimized for high-speed signal routing and
switching over lossy FR-4 printed circuit board backplanes and balanced cables. The DS10CP154A operates in
two modes: Pin Mode (EN_smb = 0) and SMBus Mode (EN_smb = 1).
When in the Pin Mode, the switch is fully configurable with external pins. This is possible with two input select
pins per output (e.g. S00 and S01 pins for OUT0).
In the Pin Mode, feedback from the LOS (Loss Of Signal) monitor circuitry is not available (there is not an LOS
output pin).
When in the SMBus Mode, the full switch configuration and SoftPWDN can be programmed via the SMBus
interface. In addition, by using the SMBus interface, a user can obtain the feedback from the built-in LOS circuitry
which detects an open inputs fault condition.
In the SMBus Mode, the S00 and S01 pins become SMBus clock (SCL) input and data (SDA) input pins
respectively; the S10, S11, S21 and S21 pins become the User-Set SMBus Slave Address input pins (ADDR0, 1,
2 and 3) while the S30 and S31 pins become non-functional (tieing these two pins to either H or L is
recommended if the device will function only in the SMBus mode).
In the SMBus Mode, the PWDN pin remains functional. How this pin functions in each mode is detailed in the
following sections.
Copyright © 2008–2013, Texas Instruments Incorporated
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