ICS1893CY-10LF View Datasheet(PDF) - Integrated Circuit Systems

Part Name

Description

MFG CO.

ICS1893CY-10LF

3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

Integrated Circuit Systems 

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ICS1893CY-10 Data Sheet - Release

Chapter 9 DC and AC Operating Conditions

9.3 Recommended Component Values *

Table 9-3. Recommended Component Values for ICS1893CY-10

Parameter

Oscillator Frequency

10TCSR Resistor Value

100TCSR Resistor Value

LED Resistor Value

Minimum

–

–

–

510

Typical

25

2.43k

See Figure 9-1

1k

Maximum

–

–

10k

Tolerance

± 50 ppm †

1%

1%

–

Units

MHz

Ω

Ω

Ω

† There are two IEEE Std 802.3 requirements that drive the tolerance for the frequency of the oscillator.

• 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).

Figure 9-1. ICS1893CY-10 10TCSR and 100TCSR

VDD

12

VDD

ICS1893CY-10

10TCSR

13

18.2 KΩ 1%

100TCSR

14

10TCSR

2.43KΩ 1%

100TCSR

1.82KΩ 1%

* For backward compatibility, refer to the "1893C Alternate Schematic" appnote.

ICS1893CY-10 Rev 1/07

Copyright © 2007, Integrated Device Technology, Inc.

All rights reserved.

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