1893AFLF IDT, 1893AFLF Datasheet - Page 106

• Manufacturer Part Number: 1893AFLF
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT
• Type: Integrated PHY Transceiverr

Specifications of 1893AFLF

• Rohs: yes
• Product: Ethernet Transceivers
• Data Rate: 10 Mb/s, 100 Mb/s
• Supply Voltage - Max: 3.47 V
• Supply Voltage - Min: 3.14 V
• Maximum Operating Temperature: + 70 C
• Package / Case: SSOP-48
• Ethernet Connection Type: 100Base-TX, 10Base-T
• Maximum Supply Current: 160 mA
• Minimum Operating Temperature: 0 C
• Standard Supported: 802.3
• Part # Aliases: ICS1893AFLF

ICS1893AF, Rev D 10/26/04
Table 9-8. MAC/Repeater Interface Pins: Media Independent Interface (MII) (Continued)
MDIO
RXCLK
Name
Pin
ICS1893AF Data Sheet - Release
Number
Pin
26
34
Output
Output
Input/
Type
Pin
Copyright © 2004, Integrated Circuit Systems, Inc.
Management Data Input/Output.
The signal on this pin can be tri-stated and can be driven by one of the
following:
All transfers and sampling are synchronous with the signal on the MDC
pin.
Receive Clock.
The ICS1893AF sources the RXCLK to the MAC/repeater interface. The
ICS1893AF uses RXCLK to synchronize the signals on the following pins:
RXD[3:0], RXDV, and RXER. The following table contrasts the behavior
on the RXCLK pin when the mode for the ICS1893AF is either 10Base-T
or 100Base-TX.
Note: If the ICS1893AF is to be used in an application that uses the
•
•
Note: The signal on the RXCLK pin is conditioned by the RXTRI pin.
A Station Management Entity (STA), to transfer command and data
information to the registers of the ICS1893AF.
The ICS1893AF, to transfer status information.
The RXCLK frequency is 2.5
MHz.
The ICS1893AF generates its
RXCLK from the MDI data stream
using a digital PLL. When the MDI
data stream terminates, the PLL
continues to operate,
synchronously referenced to the
last packet received.
The ICS1893AF switches
between clock sources during the
period between when its CRS is
asserted and prior to its RXDV
being asserted. While the
ICS1893AF is locking onto the
incoming data stream, a clock
phase change of up to 360
degrees can occur.
The RXCLK aligns once per
packet.
mechanical MII specification, MDIO must have a 1.5 k ±5%
pull-up resistor at the ICS1893AF end and a 2 k ±5% pull-down
resistor at the station management end. (These resistors enable
the station management to determine if the connection is intact.)
All rights reserved.
10Base-T
106
Chapter 9 Pin Diagram, Listings, and Descriptions
Pin Description
The RXCLK frequency is 25 MHz.
The ICS1893AF generates its
RXCLK from the MDI data stream
while there is a valid link (that is,
either data or IDLEs). In the
absence of a link, the ICS1893AF
uses the REF_IN clock to
generate the RXCLK.
While the ICS1893AF is bringing
up a link, a clock phase change of
up to 360 degrees can occur.
The RXCLK aligns once, when
the link is being established.
100Base-TX
October, 2004