KS8993F Micrel Inc, KS8993F Datasheet - Page 97

• Manufacturer Part Number: KS8993F
• Description: IC CONV MED 10/100 3PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8993F

• 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): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 1.89/3.465V
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: KS8993F-EVAL - EVAL KIT EXPERIMENTAL KS8993F
• Lead Free Status / RoHS Status: Not Compliant, Lead free / RoHS Compliant

6.4
The KS8993F should be powered up with the VDD core voltages applied before the VDDIO voltage. In the worst case,
both VDD core and VDDIO voltages can be applied simultaneously.
Additional, reset timing requirement are summarized in the following figure and table.
After the de-assertion of reset, it is recommended to wait a minimum of 100 us before starting programming on the
managed interface (I2C slave, SPI slave, SMI, MIIM).
Micrel, Inc.
June 2009
Reset Timing
Parameter
t
t
t
t
cs
ch
sr
rc
Output Pin
Strap-In
Voltage
Strap-In /
RST_N
Supply
Value
Stable supply voltages to reset high
Configuration setup time
Configuration hold time
Reset to Strap-In pin output
Table 23: Reset Timing Parameters
Description
Figure 24: Reset Timing
tsr
97
tcs
tch
trc
Min
10
50
50
50
[e-mail]
Max
Units
ms
ns
ns
us
or [phone]
M9999-062509
KS8993F/FL