MAXIM DS1088L_12

19-6184; Rev 2; 1/12
DS1088L
Fixed-Frequency EconOscillator™
General Description
The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in
factory-calibrated frequencies from 312kHz to 133MHz.
The device has a power-down pin for power-sensitive
applications.
Applications
Features
SFactory-Programmed Square-Wave Generator
from 321kHz to 133MHz
SSingle Output
SNo External Timing Components Required
S2.7V to 3.6V Supply
SPower-Down Mode
Printers
S1% Frequency Tolerance Over Temperature and
Voltage
Copiers
SWide Temperature Range (-20°C to +85°C)
Automotive Telematics
Computer Peripherals
Typical Operating Circuit
POS Terminals
Cable Modems
312kHz TO 133MHz
OUTPUT
OUT
Ordering Information appears at end of data sheet.
VCC
VCC
DNC
DS1088L
DNC
VCC
PDN
GND
GND
VCC
DECOUPLING CAPACITORS
(0.1µF AND 0.01µF)
EconOscillator is a trademark of Maxim Integrated Products, Inc.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/DS1088L.related
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
DS1088L
Fixed-Frequency EconOscillator™
ABSOLUTE MAXIMUM RATINGS
(Voltages relative to ground.)
Voltage Range on VCC..........................................-0.5V to +6.0V
Voltage Range on PDN............................ -0.5V to (VCC + 0.5V)*
Operating Temperature Range........................... -20°C to +85°C
Storage Temperature Range............................. -55°C to +125°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
*Not to exceed +6.0V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
(TA = -20NC to +85NC, unless otherwise noted.)
PARAMETER
SYMBOL
Supply Voltage
VCC
High-Level Input Voltage (PDN)
VIH
Low-Level Input Voltage (PDN)
VIL
CONDITIONS
(Note 1)
MIN
TYP
2.7
0.7 x VCC
-0.3
MAX
UNITS
3.6
V
VCC + 0.3
V
0.3 x VCC
V
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
VCC 0.4
UNITS
High-Level Output Voltage (OUT)
VOH
IOH = -4mA, VCC = MIN
Low-Level Output Voltage (OUT)
VOL
IOL = 4mA
0.4
V
High-Level Input Current (PDN)
IIH
VCC = 3.6V
1
FA
Low-Level Input Current (PDN)
IIL
VIL = 0V
ICC
VCC = 3.6V, CL = 15pF, fO = 133MHz
Supply Current (Active)
Standby Current (Power-Down)
ICCQ
Power-down mode
V
-1
FA
15
24
mA
10
FA
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DS1088L
Fixed-Frequency EconOscillator™
OSCILLATOR CHARACTERISTICS
(VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.)
PARAMETER
Output Frequency Range
Available
SYMBOL
CONDITIONS
fO
MIN
TYP
MAX
UNITS
0.3124
133.3
MHz
Output Frequency Tolerance
∆fO
fO
VCC = 3.3V, TA = +25NC (Note 2)
-0.3
+0.3
%
Voltage Frequency Variation
∆fV
fO
Over voltage range, TA = +25NC (Note 3)
-0.35
+0.35
%
Temperature Frequency Variation
∆fT
fO
Over temperature
range, VCC = 3.3V
(Notes 4, 5)
-20NC to +25NC
-0.7
+0.7
+25NC to +85NC
-0.5
+0.5
-1.0
+1.0
%
MAX
UNITS
Frequency Variation Over
Voltage and Temperature
∆fV,T
fO
Over voltage and temperature range
%
AC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.)
PARAMETER
Power-Up Time
OUT Disabled After Entering
Power-Down Mode
Load Capacitance
Output Duty Cycle (OUT)
SYMBOL
CONDITIONS
MIN
TYP
tPOR +
tSTAB
(Note 6)
100
Fs
tPDN
(Note 7)
7
Fs
CL
(Note 8)
50
pF
60
%
fO < 80MHz, fO ≥ 80MHz
fO < 80MHz
15
40
50
Note 1: All voltages are referenced to ground.
Note 2: Typical frequency shift due to aging is within ±0.2%. Aging stressing includes level 1 moisture reflow preconditioning
(24hr +125°C bake, 168hr +85°C/85%RH moisture soak, and three solder reflow passes +240°C +0°C/-5°C peak) followed
by1000hr (max) VCC biased +125°C OP/L, 1000hr unbiased +150°C bake, 1000 temperature cycles at -55°C to +125°C,
and 168hr +121°C/2 ATM steam/unbiased autoclave.
Note 3: This is the change in output frequency due to changes in voltage at TA = +25°C.
Note 4: Guaranteed by design.
Note 5: This is the change in output frequency due to changes in temperature from the +25°C frequency at VCC = 3.3V.
Note 6: This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally introduced to allow the oscillator to stabilize. tSTAB is equivalent to approximately 512 clock cycles and will depend on the programmed oscillator frequency.
Note 7: Output disabled in two cycles or less of the output frequency.
Note 8: Output voltage swings may be impaired at high frequencies combined with high-output loading.
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DS1088L
Fixed-Frequency EconOscillator™
Typical Operating Characteristics
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
9
8
7
133MHz
6
100MHz
5
4
133MHz
6
55
133MHz
10
9
100MHz
7
3.1
80MHz
6
3.3
3.5
2.9
2.7
3.3
3.1
3.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
FREQUENCY ERROR
vs. SUPPLY VOLTAGE
FREQUENCY ERROR
vs. TEMPERATURE
2.1
2.0
1.9
1.8
1.7
0.10
0.05
133MHz
0
-0.05
80MHz
-0.10
1.5
5
55
30
2.9
2.7
TEMPERATURE (°C)
3.1
3.3
100MHz
-0.2
TA = +25°C
CL || RL = 1.8pF || 500Ω
-20
55
30
5
SUPPLY VOLTAGE (V)
80
TEMPERATURE (°C)
DUTY CYCLE
vs. TEMPERATURE
56
DS1088L toc07
56
DS1088L toc06
80MHz
-0.1
-0.4
3.5
DUTY CYCLE
vs. SUPPLY VOLTAGE
133MHz
55
VCC = 3.3V
133MHz
55
54
54
53
DUTY CYCLE (%)
DUTY CYCLE (%)
133MHz
0
-0.3
TA = +25°C
CL || RL = 1.8pF || 500Ω
-0.20
80
100MHz
0.1
80MHz
-0.15
1.6
VCC = 3.3V
0.2
DS1088L toc08
2.2
100MHz
FREQUENCY ERROR (%)
FREQUENCY ERROR (%)
0.15
0.3
DS1088L toc05
0.20
DS1088L toc04
VPDN = 0V
2.3
-20
11
TEMPERATURE (°C)
VCC = 3.3V
2.4
2.9
2.7
80
12
80MHz
3
30
13
8
4
2.5
SHUTDOWN CURRENT (µA)
100MHz
5
CL = 15pF
TA = +25°C
14
7
3
5
15
8
80MHz
-20
CL = 1.8pF
TA = +25°C
DS1088L toc02
10
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
9
CL = 1.8pF
SUPPLY CURRENT (mA)
VCC = 3.3V
DS1088L toc01
10
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS1088L toc03
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
100MHz
52
51
TA = +25°C
CL || RL = 1.8pF || 500Ω
49
2.7
2.9
52
100MHz
51
50
80MHz
50
53
3.1
3.3
SUPPLY VOLTAGE (V)
80MHz
49
3.5
TA = +25°C
CL || RL = 1.8pF || 500Ω
48
-20
5
30
55
80
TEMPERATURE (°C)
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DS1088L
Fixed-Frequency EconOscillator™
Pin Configuration
TOP VIEW
+
OUT 1
8
DNC
7
DNC
3
6
PDN
GND 4
5
GND
VCC 2
VCC
DS1088L
µSOP
Pin Description
PIN
NAME
1
OUT
Oscillator Output
FUNCTION
2, 3
VCC
Power Supply
4, 5
GND
Ground
6
PDN
Active-Low Power-Down. When the pin is high, the oscillator is enabled. When the pin is low, the
oscillator is disabled (power-down mode).
7
DNC
Do Not Connect. The DNC pins are internally connected to ground.
8
DNC
Do Not Connect
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DS1088L
Fixed-Frequency EconOscillator™
Detailed Description
The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in
factory-calibrated frequencies from 312kHz to 133MHz.
The device has a power-down pin for power-sensitive
applications. A block diagram is shown in Figure 1.
Output Frequency
The internal oscillator frequency is divided by the factoryprogrammed prescaler to produce an output frequency
of 312kHz to 133MHz. Contact the factory for custom
frequencies.
Power-Down Mode
Applications Information
Power-Supply Decoupling
To achieve the best results when using the DS1088L,
the power supply must be decoupled with 0.01µF and
0.1µF high-quality, ceramic, surface-mount capacitors.
Surface-mount components minimize lead inductance,
which improves performance, and tend to have adequate high-frequency response for decoupling applications. These capacitors should be placed as close as
possible to the VCC and GND pins.
Chip Information
SUBSTRATE CONNECTED TO GROUND
The PDN pin disables the internal oscillator and the
oscillator output for power-sensitive applications. The
power-down pin must remain low for at least two output
frequency cycles plus 10µs for deglitching purposes. On
power-up, the output is disabled until power is stable
and the voltage-controlled oscillator has generated 512
clock cycles.
VCC
VCC
EEPROM
CONTROL
PDN
VOLTAGECONTROLLED
OSCILLATOR
80MHz TO 160MHz
PRESCALER
÷ BY 1, 2, 4...256
OUT
(312kHz
TO 133MHz)
GND
DS1088L
Figure 1. Block Diagram
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DS1088L
Fixed-Frequency EconOscillator™
Ordering Information
PART
FREQUENCY (MHz)
TEMP RANGE
PIN-PACKAGE
DS1088LU-02+
2.048
-20NC to +85NC
8 µSOP
DS1088LU-10+
10.0
-20NC to +85NC
8 µSOP
DS1088LU-16+
16.6
-20NC to +85NC
8 µSOP
DS1088LU-66+
66.6
-20NC to +85NC
8 µSOP
DS1088LU-100+
100.0
-20NC to +85NC
8 µSOP
DS1088LU-yyy+
(see note)
-20NC to +85NC
8 µSOP
Note: For more information about custom frequencies, email [email protected]
+Denotes a lead(Pb)-free/RoHS-compliant package.
yyy = frequency
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains
to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
8 µSOP
U8+1
21-0036
90-0092
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DS1088L
Fixed-Frequency EconOscillator™
Revision History
REVISION
NUMBER
REVISION
DATE
0
10/04
Initial release
—
1
5/05
Updated the Oscillator Characteristics table and added Note 8
3
2
1/12
Added lead(Pb)-free ordering option to the Ordering Information table; added the lead
and soldering temperature information to the Absolute Maximum Ratings section
DESCRIPTION
PAGES
CHANGED
1, 2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2012
Maxim Integrated Products 8
Maxim is a registered trademark of Maxim Integrated Products, Inc.