View CAT853_4707930.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

CAT853, CAT863 CATCAT859, CAT869
3-Pin Microprocessor Power Supply Supervisors
FEATURES
Precision monitoring of +3.3 V (-5%, -10%), 5 V (-10% Power Supplies) Active low reset output Reset valid down to VCC = 1.0 V 6 A power supply current Power supply transient immunity Industrial temperature range: -40C to +85C RoHS-compliant SOT-23 package
DESCRIPTION
The CAT853, CAT863, CAT859, and CAT869 are supervisory circuits that monitor power supplies in digital systems. These devices generate a reset signal, which is asserted while the power supply voltage is below a preset threshold level and for at least 140 ms after the power supply level has risen above that level. Industry standard threshold levels are offered to support +3.3 V or 5.0 V systems. The CAT859 and CAT869 feature a RESET push-pull output (active low) for the two pinout options. The CAT853 and CAT863 feature an open drain RESET output (active low). Both require a pull-up resistor on the RESET output. Fast transients on the power supply are ignored and the output is guaranteed to be in the correct state at VCC levels as low as 1.0 V.
APPLICATIONS
Computers Servers Laptops Cable modems Wireless communications Embedded control systems White goods Power meters Intelligent instruments PDAs and handheld equipment
For Ordering Information details, see page 9.
PIN CONFIGURATION
SOT-23 3-Lead
RESET 1
RESET
THRESHOLD SUFFIX SELECTOR
SOT-23 3-Lead
1
Nominal Threshold Voltage 4.38 V 4.20 V 3.08 V 2.93 V 2.4 V
Threshold Suffix Designation M F T S C
CAT853 CAT859
GND 2
3
VCC
VCC 2
CAT863 CAT869
3
GND
PIN DESCRIPTION
Pin Name RESET GND VCC Function Active low reset. RESET is asserted if VCC falls below the reset threshold and remains low for at least 140 ms after VCC rises above the reset threshold Ground Power supply voltage that is monitored
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
1
Doc. No. MD-3026, Rev. G
CAT853, CAT863, CAT859, CAT869
BLOCK DIAGRAMS
VCC
VCC
VCC TOLERANCE BIAS
+ -
DIGITAL DELAY
RESET
VOLTAGE REFERENCE GND
CAT853 CAT863
VCC VCC TOLERANCE BIAS
VCC
+ -
DIGITAL DELAY
RESET
VOLTAGE REFERENCE GND
CAT859 CAT869
Doc. No. MD-3026, Rev. G
2
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT853, CAT863, CAT859, CAT869
ABSOLUTE MAXIMUM RATINGS (1)
Parameters Any pin with respect to ground Input Current, VCC Output Current, RESET Rate of Rise, VCC Continuous Power Dissipation Derate 4mW/C above 70C (SOT23) Operating Temperature Range Storage Temperature Range Lead Soldering Temperature (10 sec) Ratings -0.3 to +6.0 20 20 100 320 -40 to +85 -65 to +105 300 Units V mA mA V/s mW C C C
ELECTRICAL CHARACTERISTICS
VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version. Symbol Parameter VCC Range ICC Supply Current Conditions TA = 0C to +70C TA = -40C to +85C TA = -40C to +85C M Threshold F Threshold VTH Reset Threshold Voltage T Threshold S Threshold C Threshold Reset Threshold Tempco VCC to Reset Delay Reset Active Timeout Period VOL VOH RESET Output Voltage Low RESET Output Voltage High VCC = VTH to (VTH - 100 mV) TA = -40C to +85C VCC = VTH min, ISINK = 1.2 mA VCC > 1.0 V, ISINK = 50 A VCC = VTH max, ISOURCE = -500 A (for CAT859/869 only) 0.8 VCC 140 VCC < 3.6 V, C, S, T TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C 4.31 4.25 4.14 4.08 3.04 3.00 2.89 2.85 2.35 2.30 30 20 240 460 0.4 0.3 2.40 2.93 3.08 4.20 Min 1.0 1.2 6 4.38 Typ
(2)
Max 5.5 5.5 15 4.45 4.50 4.26 4.31 3.11 3.15 2.96 3.00 2.45 2.50
Units V A
V
ppm/C s ms V V
Notes: (1) Stresses above 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 outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) Production testing done at TA = +25C; limits over temperature guaranteed by design only.
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
3
Doc. No. MD-3026, Rev. G
CAT853, CAT863, CAT859, CAT869
TYPICAL ELECTRICAL OPERATING CHARACTERISTICS
VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version.
POWER-UP RESET TIMEOUT VS. TEMPERATURE
SUPPLY CURRENT VS. TEMPERATURE (NO LOAD) 12
POWER-UP RESET TIMEOUT (ms)
260
SUPPLY CURRENT (A)
240 220 200
VCC = 5 V
10 8 6 4 2 0
VCC = 5.5 V
VCC = 3.6 V
VCC = 2.5 V 180 160 -50 0 50 100 150 TEMPERATURE (C)
-50
0
50
100
150
TEMPERATURE (C)
POWER-DOWN RESET DELAY VS. TEMPERATURE
NORMALIZED RESET THRESHOLD VS. TEMPERATURE 1.0002
POWER-DOWN RESET DELAY (s)
NORMALIZED THRESHOLD
14 12 10 8 6 4 2 0 -50 0 50 100 150 TEMPERATURE (C)
1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 0 20 40 60 80 100 120 TEMPERATURE (C)
Doc. No. MD-3026 Rev. G
4
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT853, CAT863, CAT859, CAT869
DETAILED DESCRIPTION
RESET TIMING The reset signal is asserted low for the CAT853, CAT863, CAT859, and CAT869 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 140 ms after the power supply voltage has risen above the threshold.
Threshold Voltage Reset Timeout Period 140 ms minimum
Power 5 V Supply Voltage 0 V
RESET
5V 0V
Figure 1. Reset Timing Diagram
VCC TRANSIENT RESPONSE The CAT853, CAT863, CAT859, and CAT869 protect Ps against brownout failure. Short duration transients of 4 s or less and 100 mV amplitude typically do not cause a false RESET. Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a
reset condition. As the amplitude of the transient goes further below the threshold (increasing VTH - VCC), the maximum pulse duration decreases. In this test, the VCC starts from an initial voltage of 0.5 V above the threshold and drops below it by the amplitude of the overdrive voltage (VTH - VCC).
TRANSIENT DURATION [s]
TAMB = 25C
"C" THRESHOLD
"M" THRESHOLD
RESET OVERDRIVE V TH - VCC [mV]
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
5
Doc. No. MD-3026, Rev. G
CAT853, CAT863, CAT859, CAT869
VALID RESET WITH VCC UNDER 1.0 V To ensure that the CAT859 and CAT869 RESET pin is in a known state when VCC is under 1.0 V, a > 10 k pull-down resistor between RESET pin and GND is recommended.
Power Supply VCC
CAT8x9
RESET GND
Figure 3. RESET Valid with VCC Under 1.0 V
BI-DIRECTIONAL RESET PIN INTERFACING The CAT859 and CAT869 can interface with P/C bi-directional reset pins by connecting a 4.7 k resistor in series with the CAT859 and CAT869 reset output and the P/C bi-directional reset pin.
BUF Power Supply VCC VCC Buffered RESET
CAT8x9
RESET GND RESET INPUT
Bi-directional I/O Pin
P
(For example: 68HC11)
GND
Figure 4. Bi-directional Reset Pin Interfacing
Doc. No. MD-3026 Rev. G
6
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT853, CAT863, CAT859, CAT869
CAT853 AND CAT863 OPEN-DRAIN RESET APPLICATION The CAT853 and CAT863 features an open-drain RESET output and therefore need a pull-up resistor on the output for proper operation, as shown on Figure 5. An advantage of the open-drain output includes the ability to "wire AND" several outputs together to form an inexpensive logic circuit. It is also possible to have the pull-up resistor connected to a different supply which can be higher than the CAT8x3 VCC pin. The value of the pull-up resistor is not critical in most applications, typical values being between 5 k and 10 k.
Power Supply VCC 5k VCC
CAT8x3
RESET GND RESET INPUT
P
GND
Figure 5. Typical CAT8x3 Open-Drain Circuit Configuration
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
7
Doc. No. MD-3026, Rev. G
CAT853, CAT863, CAT859, CAT869
PACKAGE OUTLINE DRAWING
SOT-23 3-LEAD (TB)
(1)(2)
D 3
SYMBOL
MIN
NOM
MAX
A A1 b c
E1 E
0.89 0.013 0.37 0.085 2.80 2.10 1.20 0.95 BSC 1.90 BSC 0.400 REF 0.540 REF 0
1.12 0.10 0.50 0.18 3.04 2.64 1.40
D E E1 e e1 L L1
1 e e1 TOP VIEW
2
8
A
b A1
L1
L
c
SIDE VIEW
END VIEW
Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC standard TO-236.
Doc. No. MD-3026 Rev. G
8
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT853, CAT863, CAT859, CAT869
EXAMPLE OF ORDERING INFORMATION
Prefix CAT
Company ID Device Type
(1) (2) (3)
Device # 859
Suffix S
Threshold Level M: 4.38 V F: 4.20 V T: 3.08 V S: 2.93 V C: 2.40 V
TB
I
-G
Lead Finish G:NiPdAu
T10
Tape & Reel T: Tape & Reel 3: 3,000/Reel 10: 10,000/Reel
853: Open Drain / Active Low Output 863: Open Drain / Active Low Output 859: Push-Pull / Active Low Output 869: Push-Pull / Active Low Output
Temperature Range I = Industrial (-40C to 85C)
Package TB: SOT-23 (1)
TOP MARKING
Part and Threshold CAT859C CAT859T CAT859S CAT859F CAT859M CAT869T CAT869S CAT869M SOT-23 RoHS (4) (5) NiPdAu Finish Part and Threshold CAT853C CAT853T CAT853S CAT853F CAT853M CAT863T CAT863S CAT863M SOT-23 RoHS (4) (5) NiPdAu Finish
RSYM
RUYM
RTYM
RVYM
ORDERING PART NUMBER (6)
CAT859CTBI-G CAT859TTBI-G CAT859STBI-G CAT859FTBI-G CAT859MTBI-G CAT869TTBI-G CAT869STBI-G CAT869MTBI-G CAT853CTBI-G CAT853TTBI-G CAT853STBI-G CAT853FTBI-G CAT853MTBI-G CAT863TTBI-G CAT863STBI-G CAT863MTBI-G
Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The device used in the example above is a CAT859STBI-GT10 (Push-Pull / Active Low Output, trip level of 2.85 V to 3.00 V NiPdAu, Tape and Reel). (3) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. (4) The "YM" in the SOT-23 package marking indicates the Year and Month of production. (5) All NiPdAu devices will be marked to indicate product type. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents. (6) For special threshold and package options, contact factory.
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice
9
Doc. No. MD-3026, Rev. G
CAT853, CAT863, CAT859, CAT869
REVISION HISTORY
Date 11-Oct-06 04-May-07 Rev. A B Description Initial Issue CAT859, CAT869 Added CAT853, CAT863 Update Example of Ordering Information Update Top Marking Update Ordering Part Number Add Threshold Level - C: 2.40 V Update Package Outline Drawing Add MD- to document number Added Block Diagrams Change logo and fine print to ON Semiconductor Convert to MS Word format Add Nominal Threshold Voltage 4.20 "F"
17-Jan-07 30-Jan-08 05-Nov-08 04-Mar-09 08-Apr-09
C D E F G
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center: Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
Doc. No. MD-3026 Rev. G
10
(c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice

▲Up To Search▲

Price & Availability of CAT853

	To Download CAT853 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .