Crystal connection. If using an external reference, this pin must be left unconnected.
Crystal connection or external reference frequency input. This pin has dual functions.
It can be connected either to an external crystal or an external reference clock.
Power supply for the entire chip.
Spread spectrum clock output.
Ground connection.
Rev. 1 | Page 2 of 11 | www.onsemi.com
ASM3P2863A
Pin Configuration (8-pin SOIC and TSSOP Packages)
XIN / CLKIN
1
XOUT
2
REFOUT
3
NC
4
8
7
VDD
NC
ModOUT
VSS
ASM3P2863A
6
5
Pin Description
Pin#
1
2
3
4
5
6
7
8
Pin Name
XIN / CLKIN
XOUT
REFOUT
NC
VSS
ModOUT
NC
VDD
Type
I
O
O
-
P
O
-
P
Description
Crystal connection or external reference frequency input. This pin has dual functions. It
can be connected either to an external crystal or an external reference clock.
Crystal connection. If using an external reference, this pin must be left unconnected.
Buffered output of the input frequency.
No connect.
Ground connection.
Spread spectrum clock output.
No connect.
Power supply for the entire chip.
Modulation Profile
Specifications
Description
Input Frequency
Modulation Equation
Frequency Deviation
Specification
12MHz
F
IN
/256
±0.4% (Typ) @ 12MHz
Rev. 1 | Page 3 of 11 | www.onsemi.com
ASM3P2863A
Absolute Maximum Ratings
Symbol
VDD, V
IN
T
STG
T
s
T
J
T
DV
Storage temperature
Max. Soldering Temperature (10 sec)
Junction Temperature
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.
Parameter
Rating
-0.5 to +4.6
-65 to +125
260
150
2
Unit
V
°C
°C
°C
KV
Voltage on any input pin with respect to Ground
DC Electrical Characteristics for 2.5V Supply
(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated.)
Symbol
V
IL
V
IH
I
IL
I
IH
I
XOL
I
XOH
V
OL
V
OH
I
DD
I
CC
VDD
t
ON
Z
OUT
Input low voltage
Input high voltage
Input low current
Input high current
Parameter
Min
VSS-0.3
2.0
Typ
Max
0.8
VDD+0.3
-35
35
Unit
V
V
µA
µA
mA
mA
XOUT output low current (@ 0.5V, VDD = 2.5V)
XOUT output high current (@ 1.8V, VDD = 2.5V)
Output low voltage (VDD = 2.5V, I
OL
= 8mA)
Output high voltage (VDD = 2.5V, I
OH
= 8mA)
Static supply current
Operating voltage
Power-up time (first locked cycle after power-up)
Output impedance
1
3
3
0.6
1.8
0.8
3
2.375
2.5
50
2.625
5
V
V
mA
mA
V
mS
Ω
Dynamic supply current (2.5V, 12MHz and no load)
Note: 1. XIN / CLKIN pin is pulled low.
AC Electrical Characteristics for 2.5V Supply
Symbol
CLKIN
ModOUT
f
d
t
LH
t
HL
t
JC
t
D
1
1
Parameter
Input frequency
Output frequency
Frequency Deviation
Output rise time (measured from 0.7V to 1.7V)
Output fall time (measured from 1.7V to 0.7V)
Jitter (Cycle-to-Cycle)
Output duty cycle
Min
Typ
12
12
±0.4
Max
Unit
MHz
MHz
%
0.5
0.5
1.5
1.0
200
1.7
1.2
300
55
nS
nS
pS
%
45
50
Note: 1. t
LH
and t
HL
are measured into a capacitive load of 15pF.
Rev. 1 | Page 4 of 11 | www.onsemi.com
ASM3P2863A
DC Electrical Characteristics for 3.3V Supply
(Test condition: All parameters are measured at room temperature (+ 25°C) unless otherwise stated.)
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