1892Y-14LFT IDT, Integrated Device Technology Inc, 1892Y-14LFT Datasheet - Page 121

1892Y-14LFT

Manufacturer Part Number
1892Y-14LFT
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet

Specifications of 1892Y-14LFT

Lead Free Status / RoHS Status
Compliant
10.3 Recommended Component Values
ICS1892, Rev. D, 2/26/01
Table 10-3
Table 10-3. Recommended Component Values
Note:
† There are two IEEE Std 802.3 requirements that drive the tolerance for the frequency of the crystal.
Crystal Frequency
10TCSR Resistor Value
100TCSR Resistor Value
LED Resistor Value
ICS1892
Clause 22.2.2.1 requires the MII TX_CLK to have an accuracy of ± 100 ppm.
Clause 24.2.3.4 is more stringent. It requires the code-bit timer to have an accuracy of 0.005% (that is, ±50 ppm).
Do not put bypass capacitors across the 10TCSR or 100TCSR resistors. The bypass capacitor will
cause the bandgap circuit to oscillate.
Parameter
lists the recommended component values for the ICS1892.
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
Minimum
510
Typical
121
7.15k
2.0k
25
1k
Maximum
10k
Chapter 10 DC and AC Operating Conditions
± 50 ppm †
Tolerance
1%
1%
February 26, 2001
Units
MHz

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