M685
D
UAL SAW, SELECTABLE
F
REQUENCY VCSO
P r e l i m i n a r y I n f o r m a t i o n
PIN
D
ESCRIPTIONS
I/O
Input
Number
Name
VIN
Configuration
Description
Frequency control input.
1
Frequency select:
1
2
F_SEL
GND
Input
Internal pull-down resistor
Logic
Logic
1
0
selects Frequency 2
selects Frequency 1
.
.
3
Ground
Power supply ground connection.
4
5
FOUT
nFOUT
Output
Power
No internal terminator
Clock output pair. Differential LVPECL.
6
VCC
Power supply connection, connect to +3.3V.
Table 2: Pin Descriptions
Note 1: See “Frequency Select” in Table 5 (DC Characteristics for M685-01 on pg. 3) and Table 7 (DC Characteristics for M685-02 on pg. 4).
1
A
BSOLUTE
M
AXIMUM
R
ATINGS
Symbol Parameter
Rating
Unit
VI
Inputs
-
-
0.5 to VCC
0.5 to VCC
4.6
+
0.5
0.5
V
VO
VCC
TS
Outputs
+
V
V
Power Supply Voltage
Storage Temperature
-55 to +125
oC
Table 3: Absolute Maximum Ratings
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional operation of product at these conditions
or any conditions beyond those listed in Recommended Conditions of Operation, DC Characteristics, or
AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods
may affect product reliability
.
R
ECOMMENDED
C
ONDITIONS OF
O
PERATION
Symbol Parameter
Min
Typ
Max
Unit
VCC
Positive Supply Voltage
2.97
3.3
3.63
V
oC
-
40
25
TA
Ambient Operating Temperature
+85
Table 4: Recommended Conditions of Operation
M685 Datasheet Rev 0.7
2 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400