KS8842-16MQL Micrel Inc, KS8842-16MQL Datasheet - Page 31
![IC SWITCH 10/100 16BIT 128PQFP](/photos/6/81/68152/576-128-pqfp_sml.jpg)
KS8842-16MQL
Manufacturer Part Number
KS8842-16MQL
Description
IC SWITCH 10/100 16BIT 128PQFP
Manufacturer
Micrel Inc
Specifications of KS8842-16MQL
Applications
*
Mounting Type
Surface Mount
Package / Case
128-MQFP, 128-PQFP
Number Of Primary Switch Ports
2
Internal Memory Buffer Size
32
Operating Supply Voltage (typ)
3.3V
Fiber Support
Yes
Integrated Led Drivers
Yes
Phy/transceiver Interface
MII
Power Supply Type
Analog/Digital
Package Type
PQFP
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.5V
Operating Supply Voltage (min)
3.1V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
KS8842-PMQL-EVAL - EVAL KIT EXPERIMENTAL KS8842KS8842-16MQL-EVAL - EVAL KIT EXPERIMENTAL KS8842
Lead Free Status / RoHS Status
Not Compliant, Lead free / RoHS Compliant
Other names
576-1458
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LinkMD Cable Diagnostics
The KSZ8842M LinkMD uses time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems
such as open circuits, short circuits, and impedance mismatches.
LinkMD works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs and then analyzes the
shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault with a
maximum distance of 200m and an accuracy of +/–2m. Internal circuitry displays the TDR information in a user-readable
digital format in registers P1VCT[8:0] or P2VCT[8:0].
Note: cable diagnostics are only valid for copper connections –fiber-optic operation is not supported.
Access
LinkMD is initiated by accessing register P1VCT/P2VCT, the LinkMD Control/Status register, in conjunction with register
P1CR4/P2CR4, the 100BASE-TX PHY Controller register.
Micrel, Inc.
October 2007
Bypass Auto Negotiation
Start Auto Negotiation
and Set Link Mode
Force Link Setting
YES
NO
Figure 9. Auto Negotiation and Parallel Operation
Attempt Auto
Negotiation
31
Listen for 100BASE-TX
Link Mode Set ?
Link Mode Set
Operation
Parallel
Flow
Idles
Join
YES
NO
Listen for 10BASE-T Link
KSZ8842-16/32 MQL/MVL/MVLI/MBL
Pulses
M9999-102207-1.9