89H24NT6AG2ZBHLG8 IDT, 89H24NT6AG2ZBHLG8 Datasheet - Page 11

• Manufacturer Part Number: 89H24NT6AG2ZBHLG8
• Description: Peripheral Drivers & Components - PCIs
• Manufacturer: IDT

Specifications of 89H24NT6AG2ZBHLG8

• Rohs: yes
• Part # Aliases: IDT89H24NT6AG2ZBHLG8

Pin Characteristics
Note: Some input pads of the switch do not contain internal pull-ups or pull-downs. Unused SMBus and System inputs should be tied off to
appropriate levels. This is especially critical for unused control signal inputs which, if left floating, could adversely affect operation. Also, floating
pins can cause a slight increase in power consumption. Unused Serdes (Rx and Tx) pins should be left floating. Finally, No Connection pins
should not be connected.
PCI Express Interface
Function
REFRES[7:0]
REFRESPLL
V
V
V
Signal
V
DD
V
DD
DD
DD
DD
V
CORE
PEHA
PETA
SS
PEA
I/O
PE00RN[0]
PE00RP[0]
PE00TN[0]
PE00TP[0]
PE01RN[0]
PE01RP[0]
PE01TN[0]
PE01TP[0]
PE02RN[0]
PE02RP[0]
PE02TN[0]
PE02TP[0]
PE03RN[0]
Pin Name
Type
—
—
—
—
—
—
—
—
Table 9 Power, Ground, and SerDes Resistor Pins
Table 10 Pin Characteristics (Part 1 of 5)
External Reference Resistor. Reference for the corresponding SerDes
bias currents and PLL calibration circuitry. A 3K Ohm +/- 1% resistor should
be connected from this pin to ground and isolated from any source of noise
injection. Each bit of this signal corresponds to a SerDes quad, e.g.,
REFRES[5] is the reference resistor for SerDes quad 5.
PLL External Reference Resistor. Provides a reference for the PLL bias
currents and PLL calibration circuitry. A 3K Ohm +/- 1% resistor should be
connected from this pin to ground and isolated from any source of noise
injection.
Core V
I/O V
PCI Express Analog Power. Serdes analog power supply (1.0V).
PCI Express Analog High Power. Serdes analog power supply (2.5V).
PCI Express Transmitter Analog Voltage. Serdes transmitter analog
power supply (1.0V).
Ground.
DD.
Type
DD.
LVTTL I/O buffer power supply (3.3V).
O
O
O
O
O
O
I
I
I
I
I
I
I
Power supply for core logic (1.0V).
11 of 35
differential
Buffer
PCIe
Name/Description
2
Serial Link
Type
I/O
Resistor
Internal
1
Note: Unused SerDes
pins can be left floating
Notes
April 16, 2013