IDT77V1254L25PG IDT, Integrated Device Technology Inc, IDT77V1254L25PG Datasheet - Page 45

• Manufacturer Part Number: IDT77V1254L25PG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT77V1254L25PG

• Data Rate: 25.6/51.2Mbps
• Number Of Channels: 4
• Type Of Atm Phy Interface: DPI/UTOPIA
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Pin Count: 144
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

OSC, RXREF, TXREF and Reset Timing
IDT77V1254L25
Tcyc
Tch
Tcl
Tcc
Trrpd
Ttrh
Ttrl
Trspw
AD[7:0]
1.
Symbol
The width of the RXREF pulse is programmable in the LED Driver and HEC Status/Control Registers.
ALE
WR
CS
1
OSC cycle period
OSC high tim
OSC low time
OSC cycle to cycle period variation
OSC to RXREF Propagation Delay
TXREF High Time
TXREF Low Time
Minimum RST Pulse Width
RXREF
TXREF
OSC
RST
Address
Tas
Tapw
Parameter
Figure 45 OSC, RXREF, TXREF and Reset Timing
Tcyc
Figure 44 Utility Bus Write Cycle
Trspw
Tah
Tcswr
45 of 48
Ttrl
Taw
Tch
Trrpd
Twrpw
30
15
40
40
—
1
35
35
two OSC cycles
Tdws
Data (input)
Min.
Tcl
Ttrh
Trrpd
31.25
15.625
—
—
—
—
—
—
—
3505 drw 45
Typ.
.
Tdwh
33
16.5
60
60
1
30
—
—
—
Tch
Max.
3505 drw 44
December 2004
ns
ns
%
%
%
ns
ns
ns
—
Unit
.