All of the IDT74FCT high-performance interface family is designed for high-capacitance load drive capability while providing low-capacitance bus loading at both inputs and outputs. All inputs have clamp diodes and all outputs are designed for low-capacitance bus loading in the high- impedance state. JULY OER 1.
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Dt Sheet. SRAM timing is fixed at one cycle. The board will not work in 3. It runs typically at 50 MHz. Optionally, this clock can be supplied via a separate osallator, the PHY clock, and runs typically at 25 MHz. EPROM timing is fixed at three cycles. The four EEPROM signals are completely under software control, so access times and protocols can be specified by the user. Refer to the X documentation for more information. This bus may be used to communicate with external 8-bit devices.
This interface is also under software control, so protocol can be specified by the user. The transmit and receive clock reference frequency is provided by a This device is specified at 10 ppm accuracy to meet the ATM Forum requirements for As with the other oscillators on the eval board, this oscillator has a ferrite-bead power supply filter, and a 33 Ohm source series termination resistor.
There are also several status outputs which are not connected. It is low only when a signal is present on the receive data inputs, the is able to recover a valid clock from the signal, and the data on the signal contains proper SONET OR SDH frames.
One pair is transmit data, one pair is receive data, and the last pair is signal detect, which can also be connected as a single-ended PECL or CMOS signal. The polarity of the connectors should be observed. Other devices in the HFBRx and x families should also work here, depending on the application. Several resistors and capacitors are provided on the to set various line interface parameters on the MLCH. The connector used on the eval board is an unshielded RJ which must be low-profile to work in a standard PC expansion slot.
Unused pins on the RJ connector go to a termination network to reduce crosstalk and other forms of interference within the cable. Integrated Device Technology, Inc. Open as PDF.
Part : GRM1555C1H6R0CZ01D,IDT74FCT3807QGI,KTS6209S
Datasheet archive on 26-7-2011