Pin# Pin Name Type Pin Description
1 GNDXTAL GND GND for XTAL
2 XIN/CLKIN_25 IN Crystal input or Reference Clock input. Nominally 25MHz.
3 X2 OUT Crystal output.
4 VDDXTAL3.3 PWR Power supply for XTAL, nominal 3.3V
5 VDDREF3.3 PWR VDD for REF output. nominal 3.3V.
6 vSADR/REF3.3
LATCHED
I/O
Latch to select SMBus Address/3.3V LVCMOS copy of X1/REFIN pin
7 GNDREF GND Ground pin for the REF outputs.
8 GNDDIG GND Ground pin for digital circuitry
9 VDDDIG3.3 PWR 3.3V digital power (dirty power)
10 SCLK_3.3 IN Clock pin of SMBus circuitry, 3.3V tolerant.
11 SDATA_3.3 I/O Data pin for SMBus circuitry, 3.3V tolerant.
12 vOE0# IN
Active low input for enabling output 0. This pin has an internal 120kohm pull-down.
1 =disable outputs, 0 = enable outputs
13 BCLK0 OUT True output of differential BCLK.
14 BCLK0# OUT Complement output of differential BCLK.
15 GND GND Ground pin.
16 VDDO3.3 PWR Power supply for outputs,nominal 3.3V.
17 vOE1# IN
Active low input for enabling output 1. This pin has an internal 120kohm pull-down.
1 =disable outputs, 0 = enable outputs
18 BCLK1 OUT True output of differential BCLK.
19 BCLK1# OUT Complement output of differential BCLK.
20 GNDA GND Ground pin for the PLL core.
21 VDDA3.3 PWR 3.3V power for the PLL core.
22 BCLK2 OUT True output of differential BCLK.
23 BCLK2# OUT Complement output of differential BCLK.
24 vOE2# IN
Active low input for enabling output 2. This pin has an internal 120kohm pull-down.
1 =disable outputs, 0 = enable outputs
25 VDDO3.3 PWR Power supply for outputs,nominal 3.3V.
26 GND GND Ground pin.
27 BCLK3 OUT True output of differential BCLK.
28 BCLK3# OUT Complement output of differential BCLK.
29 vOE3# IN
Active low input for enabling output 3. This pin has an internal 120kohm pull-down.
1 =disable outputs, 0 = enable outputs
30 GND GND Ground pin.
31 ^CKPWRGD_PD# IN
Input notifies device to sample latched inputs and start up on first high assertion. Low
enters Power Down Mode, subsequent high assertions exit Power Down Mode. This
pin has internal 120kohm pull-up resistor.
32 vSS_EN_tri LATCHED IN
Latched select input to select spread spectrum amount at initial power up :
1 = -0.5% spread, M = -0.25%, 0 = Spread Off
33 ePAD GND Connect to ground
