ETC T73327

Preliminary Information
T73327 / 73327A / 73327B
15-36 MHz, 3.3V VCXO
Applications
•
Crystal-driven clock source for low cost set top boxes
General Description
The TLSI T73327/73327A is a single-chip, low-jitter Voltage-Controlled-Crystal-Oscillator. The device
accepts a 15 MHz-36 MHz crystal input and produces a low-jitter output at the same frequency. A 0V to
+3.3V control signal is used to fine-tune the output clock frequency in the ±120ppm range.
Features
•
+3.3V operating voltage
•
240 ppm pull range (±120 ppm)
•
Uses inexpensive pullable crystals
•
Excellent pull range linearity
•
12mA drive capability at TTL levels
•
8-pin SOIC, 8-pin MSOP packages available
•
Low Cost
•
Alternate industry pinouts available
Figure 1. Functional Block Diagram
VDD
VIN
X2
15 MHz – 36MHz
Pullable Crystal
Output
Buffer
X1
CLK
Oscillator
GND
T73327/73327A/73327BPI
Page 1
Rev J, January 14, 2005
TLSI Incorporated, 770 Park Avenue, Huntington NY 11743 • (631) 755-7005 • Fax 631-755-7626 • www.tlsi.com
T73327/T73327A/T73327B
Preliminary Information
Figure 2. Pin Configuration
8-pin SOIC/MSOP
8-pin SOIC/MSOP
8-pin SOIC/MSOP
X1
1
8
X2
X1
1
8
X2
X1
1
8
X2
VDD**
2
7
GND
NC
2
7
NC
VDD
2
7
NC
6
NC**
VIN
3
6
VDD
VIN
3
6
CLK
5
CLK
GND
4
5
CLK
GND
4
5
NC
VIN
3
GND
4
T73327
T73327B
8-pin SOIC/MSOP
(See pages 4 & 5
for package outlines
&
ordering information)
Table 1. Pin Description
Name
T73327A
Pin No.
Type
Description
73327
73327A
73327B
1
1
1
Xi
Crystal connection. Connect to a 15 MHz - 36MHz pullable crystal
2**
6
2
P
This pin can alternately be used to connect VDD instead of pin 6 or left
unconnected (for T73327 only).
3
3
3
I
Tuning control input. Zero to +3.3V signal controls the frequency of the
VCXO.
GND
4, 7
4
4
P
Connect to ground.
CLK
5
5
6
O
Clock output
NC**
6**
-
5
NC
This pin can alternately be used to connect VDD instead of pin 2 or left
unconnected (for T73327 only).
NC
-
2, 7
7
NC
Do not connect
X2
8
8
8
Xi
Crystal connection. Connect to a 15 MHz – 36 MHz pullable crystal.
X1
VDD**
VIN
Legend: I = Input
O = Output
P = Power supply connection
Xi = Crystal connections
NC = No connection
**Note: On the T73327 only, both pin 2 and pin 6 are internally connected to VDD. Either pin or both can safely be connected to
VDD without damaging the part. Alternately, at the user’s option, one pin may be used for VDD with the other pin being left
unconnected (NC).
Table 2. Absolute Maximum Ratings
Parameter
Conditions
Supply voltage, VDD
Referenced to GND
Inputs and Clock Outputs
Referenced to GND
Soldering Temperature
Max of 10 seconds
Storage temperature
Min
-0.5
-65
Typ
Max
Units
7
V
VDD+0.5
V
+260
°C
+150
°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These
ratings are stress specifications only and correct functional operation of the device at these or any other conditions
above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
T73327/73327A/73327BPI
Page 2
Rev J, January 14, 2005
TLSI Incorporated, 770 Park Avenue, Huntington NY 11743 • (631) 755-7005 • Fax 631-755-7626 • www.tlsi.com
T73327/T73327A/T73327B
Preliminary Information
Table 3. Operating Conditions
Parameter
Conditions
Operating Voltage, VDD
Input High Voltage, VIH, X1 pin only
Min
Typ
Max
Units
+3.135
+3.3
+3.465
V
+2.5
V
Input Low Voltage, VIL, X1 pin only
+0.4
V
Operating Temperature
0
+70
°C
VCXO control voltage, VIN
0
+3.3
V
Table 4. DC Electrical Characteristics
TA = 0°C to +70°C, VDD = +3.135 V to +3.465 V
Parameter
Condition
Min
Output High Voltage, VOH
IOH = -12mA
2.4
Output Low Voltage, VOL
IOL = 12mA
Operating Supply Current, IDD
Short Circuit Current
Typ(1)
Max
Units
V
0.4
V
20.0
mA
No Load, 27 MHz
14.0
Each output
±50
mA
7
pF
Input Capacitance
Note:
1. Typical values are at VDD = 3.3V and +25°C
Table 5. AC Electrical Characteristics
TA = 0°C to +70°C, VDD = +3.135 V to +3.465 V
Symbol
Parameter
Condition
Min
Typ(1)
Max
Units
15
27
36
MHz
fosc
Input Crystal Frequency
tr
Output Clock Rise Time
+0.8 to +2.0V
1.5
ns
tf
Output Clock Fall Time
+2.0 to +0.8V
1.5
ns
tod
Output Clock Duty Cycle
55
%
5
%
5
%
CL = 15pF
50
ps
27 MHz @ 10 KHz
-154
dBc/Hz
27 MHz @ 100 KHz
-156
dBc/Hz
Lin
Pull Range Linearity
At VDD/2
(2)
45
50
VIN = 0.1 VDD ~ 0.9 VDD
Frequency vs Supply voltage
tjit (pk – pk)
Maximum Absolute Jitter
(Peak to Peak)
Phase Noise
fPULL
Note:
1.
2.
0V ≤VIN ≤ +3.3V
Output frequency pullability
±100
±120
Typical values are at VDD = +3.3V and +25°C
Mil-PRF-55310D 4.8.31.5 Deviation Linearity
T73327/73327A/73327BPI
Page 3
Rev J, January 14, 2005
TLSI Incorporated, 770 Park Avenue, Huntington NY 11743 • (631) 755-7005 • Fax 631-755-7626 • www.tlsi.com
ppm
T73327/T73327A/T73327B
Preliminary Information
Table 6. Pullable Crystal Specifications
Parameter
Symbol
Value
CL
18 pF (typ)
Capacitance Ratio
CO/C1
240 max
Equivalent Series Resistance
ESR
30 Ω max
Correlation (Load) Capacitance
Figure 3. Package Outline (8-pin SOIC)
T73327/73327A/73327BPI
Page 4
Rev J, January 14, 2005
TLSI Incorporated, 770 Park Avenue, Huntington NY 11743 • (631) 755-7005 • Fax 631-755-7626 • www.tlsi.com
T73327/T73327A/T73327B
Preliminary Information
Figure 4. Package Outline (8-pin MSOP)
Table 7. Ordering Information
Part Number
T73327-SO8
T73327A-SO8
T73327B-SO8
T73327-SO8-TNR
T73327A-SO8-TNR
T73327B-SO8-TNR
T73327-MO8
T73327A-MO8
T73327B-MO8
T73327-MO8-TNR
T73327A-MO8-TNR
T73327B-MO8-TNR
T73327-DIE
T73327-DPW
T73327/73327A/73327BPI
Marking
T73327
T73327A
T73327B
T73327
T73327A
T73327B
T73327
T73327A
T73327B
T73327
T73327A
T73327B
N/A
Shipping/Packaging
Tubes
No. of
Pins
8
Package
SOIC
Temperature
0°C to +70°C
Tape & Reel
8
SOIC
0°C to +70°C
Tubes
8
MSOP
0°C to +70°C
Tape & Reel
8
MSOP
0°C to +70°C
Die in Waffle Pack
8
N/A
0°C to +70°C
N/A
Die in Probed Wafer
8
N/A
0°C to +70°C
Page 5
Rev J, January 14, 2005
TLSI Incorporated, 770 Park Avenue, Huntington NY 11743 • (631) 755-7005 • Fax 631-755-7626 • www.tlsi.com