STCL1100 STCL1120 STCL1160
High frequency silicon oscillator family
Features
Fixed frequency 10/12/16 MHz 1.5% frequency accuracy over all conditions 5 V 10% operation Low operating current, ultra low standby current Push-pull, CMOS compatible frequency (square wave) output Chip enable input, active high Fast & stable start-up No external components required Temperature range: 20 to +85 C Package: SOT23-5L RoHS compliant S OT 2 3 - 5 L
Description
The STCL1xx0 silicon oscillator devices are reliable, easy to use, 5-pin low-cost fixed frequency silicon oscillators developed primarily for microprocessor clock applications, display drivers or other system applications where tighter clock accuracy is not critical. Compared to ceramic resonators and crystal oscillators, silicon oscillators offer the advantages of faster start-up, smaller size and improved immunity to shock, vibration and EMI. The STCL1xx0 silicon oscillator devices are equipped with chip enable input, offering an easy way to stop microprocessor clocking during a power saving mode while at the same time significantly reducing the oscillator current consumption.
Applications
Motor control Home appliances Building control Advanced battery chargers Low speed USB applications Display drivers Generally where ceramic resonators are currently being used.
February 2008
Rev 2
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Contents
STCL1100 STCL1120 STCL1160
Contents
1 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 3
Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 3.2 3.3 Chip Enable (CE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Transition to disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Fast start-up and wake-up from disable . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 5 6 7 8 9
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical operating characteristics and scope plots . . . . . . . . . . . . . . . 11 Package details SOT23-5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Par t numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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STCL1100 STCL1120 STCL1160
List of tables
List of tables
Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DC and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 SOT23-5L - 5-lead small outline transistor package mechanical data . . . . . . . . . . . . . . . . 14 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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List of figures
STCL1100 STCL1120 STCL1160
List of figures
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. SOT23-5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Microprocessor (MCU, microcontroller unit) clock example - replacement of a crystal or ceramic resonator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Frequency vs. temperature, STCL1120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Duty cycle vs. temperature, STCL1120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Active supply current vs. temperature, STCL1120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Standby supply current vs. temperature, STCL1120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Start-up time vs. temperature, STCL1120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Start-up output waveform, first cycles zoom (power-on), STCL1120 . . . . . . . . . . . . . . . . . 13 SOT23-5L - 5-lead small outline transistor package outline . . . . . . . . . . . . . . . . . . . . . . . . 14
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STCL1100 STCL1120 STCL1160
Pin connections
1
Pin connections
Figure 1. SOT23-5L
CE
1
5
VCC
NC
2
FOUT
3
4
GND
AI12656
1.1
Signal names
VCC Positive supply voltage pin FOUT Frequency (square wave) output, CMOS compatible, push-pull CE Chip Enable input, active high, no internal pull-up resistor
GN D Gr o u n d NC No Connect
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Typical application circuit
STCL1100 STCL1120 STCL1160
2
Figure 2.
Typical application circuit
Microprocessor (MCU, microcontroller unit) clock example - replacement of a crystal or ceramic resonator
MCU
CE (2) I/O 1 5 VCC VCC 5V 0.1 F(1) GND 3 4 GND
NC Xtal1 (OSC1, OSCin) Xtal2 (OSC2, OSCout) FOUT
2
STCL1xx0
NC or GND (see datasheet of the specific MCU)
AI12657c
1. For reliable operation and to further improve immunity to harsh environment, the minimum 0.1 F decoupling capacitor is recommended to be placed as close as possible to the VCC and GND pins of the oscillator device. The whole oscillator block should then be placed near the microprocessor clock input. 2. To minimize standby current, no internal pull-up resistor to VCC is implemented on the CE input, thus the input level must be permanently defined by the controlling signal. If the chip enable feature is not used, in active mode connect the CE pin to VCC . In applications utilizing standby mode and where the CE pin is connected to the controlling I/O port of the clocked microprocessor, for successful start-up of the microprocessor at power-on, initial logic high level needs to be secured on the CE pin to provide clock already during the power-on reset until the microprocessor program starts and the controlling I/O port takes over the CE control.
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STCL1100 STCL1120 STCL1160
Operation
3
Operation
Use of the STCL1xx0 silicon oscillator device is very simple. Once power is applied to V CC pin, a CMOS-compatible square wave output signal is provided on the FOUT output pin (in active mode the Chip Enable (CE) input pin must be at a logic high level).
3.1
Chip Enable (CE)
This feature allows the user to stop the clock and significantly reduce the current consumption when the application is put into power saving mode. When used to clock the microprocessor in place of a crystal, the need for chip enable input stems from a difference in the way microprocessors normally disable their clock. In the case of a crystal or ceramic resonator, when going into power saving mode, the processor simply opens the internal Xtal inverter feedback which results in stopping the crystal oscillations; however in the case of the silicon oscillators this would not work and the oscillator would continue to run. So in order to use this feature, one of the microprocessor's output pins must be configured to control the silicon oscillator's Chip Enable (CE) input, see Typical Application Circuit diagram. To minimize standby current of the oscillator device, no internal pull-up resistor is implemented on the CE input, thus the input level must be permanently defined by the controlling signal.
3.2
Transition to disable
The device provides additional 32 complete clock cycles after the chip enable input went inactive to allow the clocked microprocessor to complete pipelined instructions before going into sleep mode. Then during disable the output remains low.
3.3
Fast start-up and wake-up from disable
The total start-up time until oscillations internally stabilize and remain within specifications is 50 s max from the point when VCC reached min operating voltage (at power on) or from the point when CE went active (wake-up from disable mode). The output remains low even during initial 16 cycles after CE went active to provide stabilized valid output waveform already from the first output cycle, see Table 3: DC and AC parameters and Figure 8: Startup output waveform, first cycles zoom (power-on), STCL1120. Compare to milliseconds typical for crystal oscillators or hundreds of microseconds for ceramic resonators.
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Maximum rating
STCL1100 STCL1120 STCL1160
4
Maximum rating
Stressing the device above the rating listed in the Table 1: Absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 1.
S y mb o l TSTG TSLD VI O VCC
Absolute maximum ratings
Parameter Storage temperature (VCC Off) Lead solder temperature for 10 seconds Input or output voltage Supply voltage Lead-free lead finish(1) Note Value 55 to 150 260 0.3 to VCC +0.3 0.3 to 7 Unit C C V V
1. Reflow at peak temperature of 260 C (total thermal budget not to exceed 245 C for more than 30 seconds).
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STCL1100 STCL1120 STCL1160
DC and AC parameters
5
DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the DC and AC characteristics of the device. The parameters in the following Table 3: DC and AC parameters are derived from tests performed under the DC and AC measurement conditions listed in the Table 2. Designers should check that the operating conditions in their projects match the measurement conditions when using the quoted parameters. Table 2. DC and AC measurement conditions(1)
Parameter VCC supply voltage Ambient operating temperature Load capacitance (CL)
1. Unless other specified.
4.5 to 5.5 V 20 to +85 C 12 pF
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DC and AC parameters Table 3.
Sym VCC ICC
STCL1100 STCL1120 STCL1160
DC and AC parameters(1)
Description Test condition Min 4.5 FOUT = 10 MHz, output unloaded FOUT = 12 MHz, output unloaded FOUT = 16 MHz, output unloaded Typ 5.0 590 650 800 2 Ma x 5. 5 800 900 1050 3 0. 4 VCC 0.4 V 0.8 2 1 VCC = 4.5 to 5.5 V, 20 to +85 C, "B" +1 1. 5 150 Cycle-to-cycle, 20 s measurement Taken at half of the signal amplitude From the point when VCC reached min operating voltage or CE went active until the oscillations stabilize within specifications. CL = 12 pF; 10 to 90% of the amplitude 40 150 50 30 60 50 Unit V A A A A V V V V A % ppm / C psP-P % s
Operating voltage Operating current
ICC2 VOL VOH VIL VI H ILI
Standby current Output voltage low Output voltage high Input low voltage (CE input) Input high voltage (CE input) Input leakage current (CE input) Frequency accuracy over all conditions(2), (3) Frequency temperature drift Jitter Duty cycle
CE = 0 V IOL = 3 mA IOH = 3 mA
tSTART Star t-up time(4)
tR, tF CL
Rise/fall time Load capacitance
5 12
ns pF
1. V alid for Ambient Operating Temperature: TA = 20 to +85 C; VCC = 4.5 to 5.5 V (except where noted). 2. Frequency vs. temperature characteristics has its maximum at room temperature, for both higher and lower temperatures the frequency decreases. Therefore, to reach symmetrical tolerances, the devices are factory-trimmed at room temperature to the frequency value close to higher tolerance limit. See Typical operating characteristics. 3. The specified values are for the recommended configuration, i.e. parts properly soldered on PCB, with 0.1 F ceramic capacitor soldered close to the VCC -GND pins and short leads between the output and scope probe (to minimize signal reflections; see output waveform screenshots for various conditions). Recommended is usage of the active scope probe that adds around 1 pF of the load capacity to the total load and having frequency counter connected to the scope output as input capacitance of the counter is typically in tens of pF. Installing the device in a socket may have an influence on the frequency and repeatability as well, depending on quality of its contacts. 4. For details see start-up waveform graph - Figure 8.
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STCL1100 STCL1120 STCL1160
Typical operating characteristics and scope plots
6
Figure 3.
Typical operating characteristics and scope plots
Frequency vs. temperature, STCL1120
12 .100
12 .050
12 .000 Mean frequency (MHz) 11.950
11.900
11.850 40 20 0 25 70 85 125
Temperature (C)
4V 4.5 V 5V 5.5 V 6V
AI14581
Figure 4.
Duty cycle vs. temperature, STCL1120
45.5 45.0 44.5 44.0
Duty cycle (%)
43.5 43.0 42.5 42.0 41.5 40 0 25 70 85 125
Temperature (C)
5.5 V
AI14582
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Typical operating characteristics and scope plots
STCL1100 STCL1120 STCL1160
Figure 5.
Active supply current vs. temperature, STCL1120
1000 9 00 8 00 7 00
Mean ICC (A)
6 00 5 00 4 00 3 00 2 00 1 00 0 40 0 25 70 85 125
Temperature (C)
4V 4. 5 V 5V 5.5 V 6V
AI14584
Figure 6.
Standby supply current vs. temperature, STCL1120
3000 2500 2000
Mean ICC standby (nA) 1500
1000 5 00 0 4 0 0 25 70 85 125
Temperature (C)
4V 4. 5 V 5V 5.5 V 6V
AI14585
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STCL1100 STCL1120 STCL1160
Typical operating characteristics and scope plots
Figure 7.
Start-up time vs. temperature, STCL1120
12 10 8
Start-up time (s)
6 4 2 0 40 0 25 70 85 125
Temperature (C)
5.5 V
AI14586
Figure 8.
Start-up output waveform, first cycles zoom (power-on), STCL1120
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Package details SOT23-5L
STCL1100 STCL1120 STCL1160
7
Figure 9.
Package details SOT23-5L
SOT23-5L - 5-lead small outline transistor package outline
E
A1
e D D1
B
A2 C K A CP F L
SOT23-5
Table 4.
S y mb o l
SOT23-5L - 5-lead small outline transistor package mechanical data
millimeters Typ Mi n 0.900 Ma x 1.450 0.150 1.050 0.400 0.150 2.900 1.900 2.800 0.950 1.600 1.500 0 0.350 0.100 1.750 10 0.600 0.0138 2.600 3.000 0.900 0.350 0.090 2.800 1.300 0.500 0.200 3.000 0.0413 0.0157 0.0059 0.1142 0.0748 0.1102 0.0374 0.0630 0.0591 0 0.0039 0.0689 10 0.0236 0.1024 0.1181 0.0354 0.0138 0.0035 0.1102 Typ 0.0472 inches M in 0.0354 Ma x 0.0571 0.0059 0.0512 0.0197 0.0079 0.1181
A A1 A2 B C D D1 E e F K L
1.200
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STCL1100 STCL1120 STCL1160
Part numbering
8
Table 5.
Part numbering
Ordering information scheme
STCL 1 120 Y B F C WY 5
Device type (Root Part Number)
Product family 1 = Single frequency, fixed
Frequency 100 = 10.0 MHz 120 = 12.0 MHz 160 = 16.0 MHz
Operating voltage Y = 4.5 to 5.5 V
Accuracy B = 1.5%
Chip enable F = Single chip enable, active high, no pull
Disable mode C = Additional 32 cycles, output low in disable, skip 16 cycles at start-up, output low during that
Package W Y = SOT23-5L
Temperature range 5 = 20 to +85 C Not e: Contact local ST sales office for availability of other product options (chip enable active high or low, with or without internal pull-up or pull-down, possibility of various disable modes, start-up procedures, output low or in high-impedance when disabled, etc.).
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Revision history
STCL1100 STCL1120 STCL1160
9
Revision history
Table 6.
Dat e 26-Mar-2007 04-M ay-2007 07-Jun-2007 19-Feb-2008
Document revision history
Revision 0.1 1 1.0.1 2 Initial release. Parameters update in Table 3. Typing error corrected. Document reformatted, updated title, Features, Description, Table 2, Table 3 , Table 5, Figure 2 to Figure 8 . Changes
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STCL1100 STCL1120 STCL1160
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