89HPES4T4 Datasheet, PDF (11/23 Pages) Integrated Device Technology – 4-Lane 4-Port PCI Express Switch

IDT 89HPES4T4 Data Sheet
Recommended Operating Supply Voltages
Symbol
V_DDCORE
V_DDI/O
V_DDPE
V_DDAPE
V_TTPE
V_SS
Parameter
Minimum Typical
Internal logic supply
0.9
1.0
I/O supply except for SerDes LVPECL/CML
3.135
3.3
PCI Express Digital Power
0.9
1.0
PCI Express Analog Power
PCI Express Serial Data Transmit
Termination Voltage
Common ground
0.9
1.0
1.425
1.5
0
0
Table 12 PES4T4 Operating Voltages
Maximum
1.1
3.465
1.1
1.1
1.575
0
Unit
V
V
V
V
V
V
Power-Up/Power-Down Sequence
This section describes the sequence in which various voltages must be applied to the part during power-up to ensure proper functionality. For the
PES4T4, the power-up sequence must be as follows:
1. V_DDI/O — 3.3V
2. V_DDCore, V_DDPE, V_DDAPE — 1.0V
3. V_TTPE — 1.5V
When powering up, each voltage level must ramp and stabilize prior to applying the next voltage in the sequence to ensure internal latch-up issues
are avoided. There are no maximum time limitations in ramping to valid power levels.
The power-down sequence must be in the reverse order of the power-up sequence.
Recommended Operating Temperature
Grade
Temperature
Commercial
0°C to +70°C Ambient
Table 13 PES4T4 Operating Temperatures
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September 7, 2007