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 7 | 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)
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
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.
Operating Conditions
Parameter
VDD
T
A
C
L
C
IN
Supply Voltage
Operating Temperature (Ambient Temperature)
Load Capacitance
Input Capacitance
Description
Min
2.375
0
Max
3.6
+70
15
7
Unit
V
°
C
pF
pF
DC Electrical Characteristics for 2.5V Supply
Symbol
Parameter
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
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
Min
VSS-0.3
2.0
Typ
Max
0.8
VDD+0.3
-35
35
Unit
V
V
µA
µA
mA
mA
3
3
0.6
1.8
0.8
3
2.375
2.5
50
2.625
5
V
V
mA
mA
V
mS
Dynamic supply current (2.5V, 12MHz and no load)
Note: 1. XIN / CLKIN pin is pulled low.
Rev. 1 | Page 3 of 7 | www.onsemi.com
ASM3P2863A
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.
DC Electrical Characteristics for 3.3V Supply
Symbol
Parameter
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
XOUT output low current (@ 0.4V, V
DD
= 3.3V)
XOUT output high current (@ 2.5V, V
DD
= 3.3V)
Output low voltage (VDD = 3.3V, I
OL
= 8mA)
Output high voltage (VDD = 3.3V, I
OH
= 8mA)
Static supply current
Operating Voltage
Power-up time (first locked cycle after power-up)
Output impedance
1
Min
VSS-0.3
2.0
Typ
Max
0.8
VDD+0.3
-35
35
Unit
V
V
µA
µA
mA
mA
3
3
0.4
2.5
1
3.5
3.0
3.3
45
3.6
5
V
V
mA
mA
V
mS
Dynamic supply current (3.3V, 12MHz and no load)
Note: 1. XIN / CLKIN pin is pulled low.
AC Electrical Characteristics for 3.3V Supply
Symbol
Parameter
CLKIN
ModOUT
f
d
t
LH
t
HL
1
1
Min
Typ
12
12
±0.4
Max
Unit
MHz
MHz
%
Input frequency
Output frequency
Frequency Deviation
Output rise time (measured from 0.8 to 2.0V)
Output fall time (measured at 2.0V to 0.8V)
Jitter (Cycle-to-Cycle)
Output duty cycle
45
0.5
0.4
1.4
1.0
±200
50
1.6
1.2
±300
55
nS
nS
pS
%
t
JC
t
D
Note: 1. t
LH
and t
HL
are measured into a capacitive load of 15pF.
Rev. 1 | Page 4 of 7 | www.onsemi.com
ASM3P2863A
Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
Frequency tolerance
Operating temperature range
Storage temperature
Load capacitance (C
P
)
Shunt capacitance
ESR
12MHz
±50ppm or better at 25°
C
-25° to +85°
C
C
-40° to +85°
C
C
18pF
7pF maximum
25Ω
Note: C
L
is Load Capacitance and Rx is used to prevent oscillations at overtone frequency of the Fundamental frequency.
Typical Crystal Interface Circuit
R
Crystal
XIN
C
L
Rx
XOUT
C
L
C
L
= 2*(C
P
– C
S
),
Where C
P
= Load capacitance of crystal from crystal vendor datasheet.
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