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
Symbol
V
DD
T
A
F
XIN
C
L
Parameter
Supply Voltage
Ambient Operating Temperature Range
Crystal Resonator Frequency
Serial Data Transfer Rate
Output Driver Load Capacitance
Condition /
Description
3.3V ± 10%
Min
3
-10
10
Typ
3.3
Max
Unit
V
°C
MHz
Kb/s
pF
Standard Mode
3.6
+70
14.31818
100
15
Rev 2 | Page 2 of 9 | www.onsemi.com
ASM3P2508A
DC Electrical Characteristics
(Test Condition: All the parameters are measured at room temperature (25°C), unless otherwise stated.)
Parameter
Overall
Supply Current,
Dynamic
Supply Current,
Static
Symbol
Conditions / Description
V
DD
= 3.3V, F
CLK
= 14.31818MHz,
C
L
= 15pF
V
DD
= 3.3V, Software Power Down
1
Min
Typ
Max
Unit
I
cc
I
DD
40
27
49
35
60
43
mA
mA
All input pins
High-Level Input
V
IH
V
DD
= 3.3V
Voltage
Low-Level Input
V
IL
V
DD
= 3.3V
Voltage
High-Level Input
I
IH
Current
Low-Level Input
I
IL
Current (pull-up)
Clock Outputs (FOUT1CLK, FOUT2CLK)
High-Level Output
V
OH
V
DD
= 3.3V, I
OH
= 20mA
Voltage
Low-Level Output
V
OL
V
DD
= 3.3V, I
OL
= 20mA
Voltage
Z
OH
V
O
= 0.5V
DD
; output driving high
Output Impedance
Z
OL
Vo = 0.5V
DD
; output driving low
Note: 1. FOUT1CLK (120MHz) is functional and not loaded.
2.0
V
SS
-0.3
-1
-20
-
-
-
-36
V
DD
+0.3
0.8
1
-80
V
V
µA
µA
2.5
0
-
-
-
-
29
27
3.3
0.4
-
-
V
V
AC Electrical Characteristics
Parameter
Rise Time
Fall Time
Clock Duty
Cycle
Frequency
Deviation
Jitter, Long
Term
Symbol
t
r
t
f
t
D
f
D
Conditions/ Description
FOUT1CLK
FOUT2CLK
FOUT1CLK
V
O
= 2.0V to 0.8V; C
L
= 15pF
FOUT2CLK
Ratio of pulse width (as measured from rising edge
to next falling edge at 2.5V) to one clock period
V
O
= 0.8V to 2.0V; C
L
= 15pF
Output Frequency = 120MHz
Output Frequency = 72MHz / 48 MHz
On rising edges 500uS apart at 2.5V relative to an
1
ideal clock, PLL B inactive
On rising edges 500uS apart at 2.5V relative to an
1
ideal clock, PLL B active
From rising edge to next rising edge at 2.5V,
1
PLL B inactive
From rising edge to next rising edge at 2.5V,
1
PLL B active
Output active from power up, RUN Mode via
Software Power Down
Min
640
440
660
460
45
-
-
-
-
-
-
-
Typ
680
480
720
520
-
±2.73
±1.78
45
165
110
390
125
Max
750
600
800
570
55
-
-
-
Unit
pS
pS
%
%
Tj
(LT)
pS
-
-
pS
-
-
µS
Jitter, peak to
peak
Clock
Stabilization
Time
Tj
(ΔT)
t
STB
Note: 1. CL = 15pF, Fxin = 14.31818MHz.
Rev 2 | Page 3 of 9 | www.onsemi.com
ASM3P2508A
Typical Crystal Oscillator Circuit
Crystal
R1 = 510Ω
C1 = 27pF
C2 = 27pF
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal Frequency
Frequency Tolerance
Operating temperature range
Storage Temperature
Load Capacitance
Shunt capacitance
ESR
14.31818MHz
±50ppm or better at 25°C
-20°C to +85°C
-40°C to +85°C
18pF
7pF maximum
25 Ω
Rev 2 | Page 4 of 9 | www.onsemi.com
ASM3P2508A
I2C Serial Interface Information
The information in this section assumes familiarity with I2C programming.
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