Digital logic input used to select Down (LOW) or Center (HIGH) spread options.
(Refer to
Frequency Deviation and Spread Selection Table).
This pin has an internal pull-up resistor.
Spread range select. Digital logic input used to select frequency deviation
(Refer to
Frequency Deviation and Spread Selection Table).
This pin has an internal pull-up resistor.
Spread spectrum clock output
Frequency range select. Digital logic input used to select Input frequency range
(Refer to
Input/Output Frequency Range Selection Table).
This pin has an internal pull-up resistor.
Power supply for the entire chip.
Crystal connection. If using an external reference, this pin must be left
unconnected.
4
5
6
7
8
SRS
ModOUT
FRS
VDD
XOUT
I
O
I
P
O
Rev. 2 | Page 2 of 11 | www.onsemi.com
ASM3P2811A/B and ASM3P2812A/B and ASM3P2814A/B
Input/Output Frequency Range Selection Table
Part Number
FRS (pin 6)
ASM3P2811 (1x)
Input
(MHz)
0
1
10-20
20-40
Output
(MHz)
10-20
20-40
ASM3P2812 (2x)
Input
(MHz)
10-20
20-40
Output
(MHz)
20-40
40-80
ASM3P2814 (4x)
Input
(MHz)
10-20
20-40
Output
(MHz)
40-80
80-160
Modulation Rate
Input Frequency / 448
Input Frequency / 896
Output Frequency Deviation and Spread Selection Table
Frequency Deviation (%)
Part Number
D_C
(pin 3)
0
ASM3P28XXA
0
1
1
0
0
ASM3P28XXB
1
1
1
SRS
(pin 4)
0
1
0
1
0
1
0
1
-3
-3.7
±1.5
±1.8
-1.7
-2.0
±0.75
±1.0
FS=0
10/20/40 (MHz)
20/40/80 (MHz)
-2.5
-3.4
±1.2
±1.6
-1.0
-1.5
±0.6
±0.75
-2.7
-3.8
±1.5
±1.9
-1.5
-2.0
±0.8
±1.0
FS=1
20/40/80 (MHz)
40/80/160 (MHz)
-2.6
-3.6
±1.3
±1.8
-1.4
-1.9
±0.7
±0.9
Note: 1. Frequency Deviation given in the table is for the Output Frequency Range covering ASM3P2811x / 12x / 14x.
Absolute Maximum Ratings
Symbol
V
DD
, V
IN
T
STG
T
s
T
J
T
DV
Storage temperature
Parameter
Rating
-0.5 to +4.6
-65 to +125
260
150
2
Unit
V
°C
°C
°C
KV
Voltage on any pin with respect to Ground
Max. Soldering Temperature (10 sec)
Junction Temperature
Static Discharge Voltage
(As per JEDEC STD 22- 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.
Rev. 2 | Page 3 of 11 | www.onsemi.com
ASM3P2811A/B and ASM3P2812A/B and ASM3P2814A/B
Operating Conditions
Symbol
VDD
T
A
C
L
C
IN
Operating temperature
Load Capacitance
Input Capacitance
Parameter
Min
3.0
-40
Max
3.6
+85
10
7
Unit
V
°C
pF
pF
Voltage on any pin with respect to GND
DC Electrical Characteristics
Symbol
V
IL
V
IH
I
IL
I
IH
I
XOL
I
XOH
V
OL
V
OH
I
CC
I
DD
VDD
t
ON
Z
OUT
Input low voltage
Input high voltage
Input low current
(Inputs D_C, SRS and FRS are pulled high internally)
Input high current
XOUT Output low current
(V
XOL
@ 0.4V, V
DD
= 3.3V)
XOUT Output high current
(V
XOH
@ 2.5V, V
DD
= 3.3V)
Output low voltage (V
DD
= 3.3V, I
OL
= 5mA)
Output high voltage (V
DD
= 3.3V, I
OH
= -5mA)
Dynamic supply current (Unloaded Output)
Static supply current , Standby mode (CLKIN pulled to
GND)
Operating voltage
Power up time (first locked clock cycle after power up)
