KS8993MI Micrel Inc, KS8993MI Datasheet - Page 83

• Manufacturer Part Number: KS8993MI
• Description: IC SWITCH 10/100 3PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8993MI

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 3
• Internal Memory Buffer Size: 32
• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 1.89/3.465V
• Operating Supply Voltage (min): 1.71/3.135V
• Power Dissipation: 800mW
• Supply Current: 0.1/0.19A
• Operating Temperature Classification: Industrial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 576-1013 - BOARD EVAL EXPERIMENT KS8993M
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant
• Other names: 576-1014

Reset Timing
As long as the stable supply voltages to reset high timing (minimum of10ms) are met, there is no power
sequencing requirement for the KSZ8993M supply voltages (1.8V, 3.3).
It is recommended to wait 100µsec after the de-assertion of reset before starting programming on the managed
interface.
The reset timing requirement is summarized in the following figure and table.
Reset Circuit Diagram
Micrel recommends the following discrete reset circuit as shown in Figure 24 when powering up the
KSZ8893M/ML/MI device. For the application where the reset circuit signal comes from another device (e.g.,
CPU, FPGA, etc), we recommend the reset circuit as shown in Figure 25.
Micrel, Inc.
October 2008
Parameter
t
t
t
t
cs
ch
sr
rc
Stable supply voltages to reset high
Configuration setup time
Configuration hold time
Reset to strap-in pin output
Description
Table 26. Reset Timing Parameters
Figure 23. Reset Timing
83
Min
10
50
50
50
Max
Units
ms
ns
ns
us
M9999-020606
KSZ8993M/ML