1www.pericom.com PI6C490098 RevB 1/14/2016
PI6C490098
Features
Support XTAL or Clock input
ree buered outputs support VDD operation
Very low phase jitter(RMS) : < 0.5ps
Very low additive jitter: <300fs (typ)
3.3V supply voltage for Core
1.8V ~ 3.3V supply voltage for two outputs
Packaging: 16-pin TSSOP
Commercial & Industrial Temperature support
Applications
Networking Systems
Femtocell BTS
Peripheral
Block Diagram Pin Configuration (16-Pin TSSOP)
Description
e PI6C490098 is a low jitter clock buer supporting either
XTAL or reference input. Two of its outputs can support wide
operating voltage from 1.8V to 3.3V. It is a cost eective way to
generate multiple outputs for all kinds of applications that need
multiple CMOS outputs with dierent power supplies.
1:3 CMOS Clock Buffer
X2
GND
VDD
CLK1
CLK2
VDDO
CLK3
GND
X1/ICLKIN
VDD
GND
VDD
NC
NC
GND
OE#
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16-pin (173 mil) TSSOP
X1/CLKIN Crystal
Oscillator
OE#
CLK3
V
V
CLK2
CLK1
GND
X2
DDO
DD
16-0010
2www.pericom.com PI6C490098 RevB 1/14/2016
PI6C490098
1:3 25MHz Clock Buer
Function Table
Pin number Pin Name Type Description
1X1/CLKIN Input Crystal connection or clock input
2, 4, 14 VDD Power 3.3V Supply voltage for core and CLK1
5, 6, NC No connect
7, 9, 15 GND Power Connect to Ground
8OE# Input Global output enable when low. Internal pull-down
resistor.
10 CLK3 Output Clock Output 3
11 VDDO Power Supply voltage from 1.8V to 3.3V for CLK2 and CLK3
12 CLK2 Output Clock Output 2
13 CLK1 Output Clock Output 1
16 X2 Output Crystal connection
OE# CLK1/CLK2/CLK3
0Enabled
1 Hi-Z, weak pull down
16-0010
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PI6C490098
1:3 25MHz Clock Buer
Power Requirements(Over operating free-air temperature range)
Storage Temperature .......................................................... –65°C to +150°C
Supply Voltage to Ground Potential, VDD ........................–0.5V to +4.6V
Note: Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the device. is is a
stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational
sections of this specication is not implied. Exposure to absolute
maximum rating conditions for extended periods may aect
reliability.
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
Symbol Parameter Min. Ty p. Max. Units
VDD Power Supply Voltage 3.135 3.3 3.465 V
VDDO Power Supply Voltage for outputs 1.71 3.465 V
IDD Power supply current, no load 5 mA
TAAmbient Operating Temperature 0+70 °C
-40 +85
tUP Power Supply Ramp Time 4 ms
Symbol Parameter Condition Min. Typ. Max. Units
VIH Input High Voltage CLKIN, OE# VDD/2+1 V
VIL Input Low Voltage CLKIN, OE# VDD/2-1 V
VOH Output High Voltage IOH = -8mA VDDO – 0.4 V
VOL Output Low Voltage IOL = 8mA 0.4 V
ZONominal Output Impedance 20 W
RPD Internal Pull-down Resistor OE# 230 kW
CLKIN 320
CIN Input Capacitance OE# 5pF
CLKIN 7
DC Electrical Characteristics
16-0010
4www.pericom.com PI6C490098 RevB 1/14/2016
PI6C490098
1:3 25MHz Clock Buer
AC Electrical Characteristics (Note 4)
Symbol Parameter Conditions Min. Typ. Max. Units
FIN Input Frequency Fundamental Crystal 10 25 52 MHz
Input Clock 1 25 125 MHz
tROutput Rise Time 20% to 80% 25MHz, Note 1, 1 ns
tFOutput Fall Time 80% to 20% 25MHz, Note 1, 1 ns
tDC Duty Cycle VDDO = 2.5V and 3.3V 47 50 53 %
V
DDO
= 1.8V 45 55 %
Ferror Output Frequency Synthesis Error 0 ppm
Jphase Clock Phase Jitter (RMS) 25MHz, Note 2 0.5 1.5 ps
Jadd Additive Jitter 25MHz, Note 3, 300 fs
1. Note 1: Measured with 7 pF lump load.
2. Note 2: 12 kHz to 20 MHz oset frequency using a crystal input.
3. Note 3: CLKIN input with X2 oating.
4. Note 4: Do not drive this device without a crystal or valid clock input
VDD
CLOAD (7pF lump load)
VDD
GND GND
CLK out
OUTPUTS
0.1µF
0.1µF
VDD
VDDO
CMOS Test Configuration
C1
20pF
Crystal�(CL�=�16pF)
C2
20pF
X1
X2
Crystal Oscillator Circuit
PI6C490098
X1
X2
TCXO
Pull up and Pull down
resistors are optional
C=22nF
Input AC Coupling Application
16-0010
5www.pericom.com PI6C490098 RevB 1/14/2016
PI6C490098
1:3 25MHz Clock Buer
DATE: 05/03/12
DESCRIPTION: 16-Pin, 173mil Wide TSSOP
PACKAGE CODE: L
DOCUMENT CONTROL #: PD-1310 REVISION: F
Notes:
1. Refer JEDEC MO-153F/AB
2. Controlling dimensions in millimeters
3. Package outline exclusive of mold flash and metal burr
12-0372
Pericom Semiconductor Corporation • 1-800-435-2336
Packaging Mechanical: 16-Pin TSSOP (L)
Ordering Information
Ordering Code Package Code Package Type Operating Temperature
PI6C490098LE L Pb-free & Green, 16-pin TSSOP Commercial
PI6C490098LIE L Pb-free & Green, 16-pin TSSOP Industrial
Notes:
• Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
• E = Pb-free and Green
• X sufx = Tape/Reel
16-0010
Mouser Electronics
Authorized Distributor
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PI6C490098LE PI6C490098LEX