2©2016 Integrated Device Technology, Inc January 6, 2016
843S304I-100 Data Sheet
Table 1. Pin Descriptions
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Number Name Type Description
1, 9, 17,
21, 25, 28, 29
V
CC
Power Core supply pins.
2 REF_SEL Input Pullup
Select input for XTAL (LOW) or PCLK (HIGH).
LVCMOS/LVTTL interface levels.
3, 6,10,
20, 24, 32
V
EE
Power Negative supply pins.
4 PCLK Input Pulldown External 25MHz non-inverted differential reference input. LVPECL input levels.
5 nPCLK Input
Pullup/
Pulldown
External 25MHz inverted differential reference input. V
CC
/2 bias voltage when left
floating. LVPECL input levels.
7V
CCA
Power Analog supply for PLL.
8 nCLK_EN Input Pulldown
Places clock outputs in active state when Low. Places clock outputs in
high-impedance state when High.
11 V
CC_XOSC
Power Power supply for crystal oscillator. recommended to use RC filter as on V
CCA
.
12,
13
XTAL_IN,
XTAL_OUT
Input Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.
14 ADR Input Pulldown I
2
C Address select pin. LVCMOS/LVTTL interface levels.
15 SCLK Input Pullup
I
2
C compatible SCLK. This pin has an internal pullup resistor.
LVCMOS/LVTTL interface levels.
16 SDATA I/O Pullup
I
2
C compatible SDATA. This pin has an internal pullup resistor.
LVCMOS/LVTTL interface levels.
18,19 Q4, nQ4 Output Differential output pair. LVPECL interface levels.
22, 23 Q3, nQ3 Output Differential output pair. LVPECL interface levels.
26, 27 Q2, nQ2 Output Differential output pair. LVPECL interface levels.
30, 31 Q1, nQ1 Output Differential output pair. LVPECL interface levels.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
C
IN
Input Capacitance 2pF
R
PULLUP
Input Pullup Resistor 51 k
R
PULLDOWN
Input Pulldown Resistor 51 k
