932SQL450 Datasheet, PDF (5/23 Pages) Integrated Device Technology – Integrated 85 ohm differential terminations

932SQL450 DATASHEET
64VFQFPN Pin Descriptions (cont.)
PIN #
PIN NAME
TYPE
DESCRIPTION
39 NS_SAS1_Z85C
OUT ^{Complementary clock of low-power push-pull differential non-spreading SAS output.}
Internally terminated to drive 85ohm transmission lines with no external components.
40 NS_SAS1_Z85T
OUT ^{True clock of low-power push-pull differential non-spreading SAS output. Internally}
terminated to drive 85ohm transmission lines with no external components.
41 AVDD_NS_SAS
PWR 3.3V power for the non-spreading SAS/SRC PLL analog circuits.
42 GNDNS
PWR Ground pin for non-spreading differential outputs and logic.
43 CPU0_Z85C
OUT ^{Complementary clock of low-power push-pull differential CPU output. Internally terminated}
to drive 85ohm transmission lines with no external components.
44 CPU0_Z85T
OUT ^{True clock of low-power push-pull differential CPU output. Internally terminated to drive}
85ohm transmission lines with no external components.
45 CPU1_Z85C
OUT ^{Complementary clock of low-power push-pull differential CPU output. Internally terminated}
to drive 85ohm transmission lines with no external components.
46 CPU1_Z85T
OUT ^{True clock of low-power push-pull differential CPU output. Internally terminated to drive}
85ohm transmission lines with no external components.
47 VDDCPU
PWR 3.3V power for the CPU outputs and logic
48 GNDCPU
PWR Ground pin for CPU outputs and logic.
49 CPU2_Z85C
OUT
Complementary clock of low-power push-pull differential CPU output.
to drive 85ohm transmission lines with no external components.
Internally terminated
50 CPU2_Z85T
OUT ^{True clock of low-power push-pull differential CPU output. Internally terminated to drive}
85ohm transmission lines with no external components.
51 CPU3_Z85C
OUT ^{Complementary clock of low-power push-pull differential CPU output. Internally terminated}
to drive 85ohm transmission lines with no external components.
52 CPU3_Z85T
OUT ^{True clock of low-power push-pull differential CPU output. Internally terminated to drive}
85ohm transmission lines with no external components.
53 VDDCPU
PWR 3.3V power for the CPU outputs and logic
54 SMBDAT
I/O Data pin of SMBUS circuitry, 5V tolerant
55 SMBCLK
IN Clock pin of SMBUS circuitry, 5V tolerant
56 GND14
PWR Ground pin for 14MHz output and logic.
57 AVDD14
PWR Analog power pin for 14MHz PLL
58 VDD14
PWR Power pin for 14MHz output and logic
14.318 MHz reference clock capable of driving 2 loads/ TEST_SEL latched input to enable
59 vREF14_2x/TEST_SELLV I/O test mode. The TEST_SEL input is a low threshold input. See the Electrical Tables and the
Test Clarification Table. This pin has a weak (~120Kohm) internal pull down.
60 GND14
PWR Ground pin for 14MHz output and logic.
61 GNDXTAL
PWR Ground pin for Crystal Oscillator.
62 X1_25
IN Crystal input, Nominally 25.00MHz.
63 X2_25
OUT Crystal output, Nominally 25.00MHz.
64 VDDXTAL
PWR 3.3V power for the crystal oscillator.
65 EPAD
GND Epad should be connected to ground.
REVISION B 03/06/15
5
LOW-POWER CK420BQ DERIVATIVE FOR PCIE COMMON CLOCK ARCHITECTURES