KSZ8721BL-EVAL Micrel Inc, KSZ8721BL-EVAL Datasheet - Page 50

• Manufacturer Part Number: KSZ8721BL-EVAL
• Description: BOARD EVALUATION FOR KSZ8721BL
• Manufacturer: Micrel Inc

Specifications of KSZ8721BL-EVAL

• Main Purpose: Interface, Ethernet PHY
• Embedded: No
• Utilized Ic / Part: KSZ8721BL
• Primary Attributes: 1 Port, 100BASE-TX/100BASE-FX/10BASE-T
• Secondary Attributes: MII, RMII, HP Auto MDI, MDI-X Auto Polarity Correction
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1626

February 2011
Communications Product Highlight — Lowest Power SFP
The MIC3003GFL is a fiber optic module controller which enables the
implementation of sophisticated, hot-pluggable fiber optic transceivers
with intelligent laser control and an internally calibrated Digital Diagnostic
Monitoring Interface per SFF-8472. It essentially integrates all non-data
path functions of an SFP/SFP+ transceiver into a tiny (3mm x 3mm) QFN
package. It also works well as a microcontroller peripheral in transponders or
10Gbps transceivers. The MIC3003GFL uses the same die as the MIC3003
with all its functions, but in a smaller package and different pin out.
Communication with the MIC3003 is via an industry standard 2-wire SMBus
serial interface. Nonvolatile memory is provided for serial ID, configuration,
and separate OEM and user scratchpad spaces.
The SY84782U is a single 2.5V supply, ultra-low power, small form factor la-
ser diode driver for telecom/datacom applications. Intended to drive FP/DFB
lasers at data rates up to 1.25Gbps, it is especially useful for Compact SFP,
SFP and SFF modules where power requirements are quite stringent. The
driver can deliver modulation current up to 90mA and offers a high compliance
voltage, all of which make the SY84782U suitable for high current operations
in both AC- and DC-coupled applications.
The SY84782U is intended to be used with Micrel’s MIC3003 Optical Trans-
ceiver Management IC, which allows for both modulation and bias current
control and monitoring. Furthermore, the MIC3003 offers power control and
temperature compensation.
DATA
CLK
MIC3003GFL
EEPROM
SMBus
LOGIC
I/F
DATA
NVRAM
MODSET
APCSET
LUT
DAC
TEMP
SFP/SFF Optical Module
LASER DIODE DRIVER
IMSET
DATA
+
SY84782U
LOS
ADC
49
+
APC
The SY84113BU low power limiting post amplifier is designed for use in fiber-
optic optical modules for multirate applications up to 1.25Gbps. The device
connects to a typical transimpedance amplifier (TIA) and can produce output
signals to CML-level waveforms. Intended for use in GbE and Fibre Channel
applications, the SY84113BU offers a wide LOS range. It is able to detect input
signals for as low as 5mV
intended to be used in AC-coupled input applications.
The SY84113BU generates a Loss-of-Signal (LOS) open-collector TTL
output. A programmable Loss-of-Signal level set pin (LOSLVL) sets the
sensitivity of the input amplitude detection. LOS asserts high if the in-
put amplitude falls below the threshold set by LOSLVL and de-asserts low
otherwise. The enable input (/EN) de-asserts the true output signal with-
out removing the input signal. The LOS output can be fed back to the /EN
input to implement the squelch function that maintains output stability under a
loss-of-signal condition.
RX Power Monitor
DAC
TX Power Monitor
SY84113BU
+
-
POST AMP
MODULATION
PP
ROSA
and as high as 100mV
TOSA
Light
Light
PP
. The SY84113BU is
Micrel, Incorporated