
ICS843251-04
FEMTOCLOCKCRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
IDT / ICS 3.3V LVPECL CLOCK GENERATOR
2
ICS843S51AG-04 REV. A JANUARY 12, 2009
Table 1. Pin Descriptions
NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
DC Electrical Characteristics
Table 3A. Power Supply DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Number
Name
Type
Description
1VCCA
Unused
Analog supply pin.
2VEE
Power
Negative supply pin.
3, 4
XTAL_OUT
XTAL_IN
Input
Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.
5
FREQ_SEL
Input
Pulldown
Frequency select pin. LVCMOS/LVTTL interface levels.
6, 7
nQ, Q
Output
Differential output pair. LVPECL interface levels.
8VCC
Power
Core supply pin.
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
CIN
Input Capacitance
4
pF
RPULLDOWN Input Pulldown Resistor
51
k
Item
Rating
Supply Voltage, VCC
4.6V
Inputs, VI
-0.5V to VCC+ 0.5V
Outputs, IO
Continuos Current
Surge Current
50mA
100mA
Package Thermal Impedance,
θ
JA
129.5
°C/W (0 mps)
Storage Temperature, TSTG
-65
°C to 150°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
VCC
Positive Supply Voltage
3.135
3.3
3.465
V
VCCA
Analog Supply Voltage
VCC – 0.13
3.3
VCC
V
IEE
Power Supply Current
70
mA
iCCA
Analog Supply Current
13
mA