View CAT705_39925.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

CAT705, CAT706, CAT813
P Supervisory Circuits
FEATURES
n Reset guaranteed valid for 1.0 V VCC n 6A supply current n 200ms Reset pulse width n Watchdog timer function 1.6s timeout n Accurate brownout detection reset in 3.0, 3.6, and 5.0 volt systems n Secondary low supply monitoring on PFI input n Pin and function compatible with the MAX705/MAX706/MAX813L products n Operating Range from -40C to +85C n RoHS Compliant SOIC 8-lead and MSOP 8-lead packages
DESCRIPTION
The CAT705, CAT706, and CAT813 provide reset and monitoring functions for the electronic systems. Each device monitors the system voltage and maintains a reset output until that voltage reaches the device's specified trip value and then maintains the reset output active condition until the device's internal timer allows the system power supply to stabilize. The devices have a watchdog input which can be used to monitor a system signal and causes WDO to go low if the signal fails to change state prior to a timeout condition. The supervisory circuits provide a input which MR initiates a reset if pulled low. The CAT705 and CAT706 provide an active low RESET output. The CAT813 provides an active high RESET output. There is a secondary supply monitor (PFI) included for power-fail warning.
APPLICATIONS
n Microprocessor and microcontroller based systems n Instrument and control systems n Portable equipment
For Ordering Information details, see page 13.
PIN CONFIGURATION
SOIC 8-Lead
MR VCC GND PFI 1 2 3 4 8 7 6 5 WDO RESET
(RESET for CAT813)
PIN FUNCTIONS
Pin Name MR VCC GND PFI PFO WDI
WDI PFO
Function Manual Reset Input Power Supply Ground Power Fail voltage monitor Input. Power Fail Output Watchdog Timer Input CMOS Push-Pull Active Low Reset Output (CAT705 & CAT706) CMOS Push-Pull Active High Reset Output (CAT813) Watchdog Timer Output
MSOP 8-Lead
RESET
(RESET for CAT813)
1 2 3 4
8 7 6 5
WDI PFO PFI GND
RESET RESET WDO
www..com
WDO MR VCC
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
1
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
BLOCK DIAGRAM
VCC 70A MR VCC RESET CONTROLLER RESET (RESET for CAT813)
VRST
TIMER
WDI
52k WATCHDOG TRANSITION DETECTION
WATCHDOG TIMER
WDO
PFI PFO
1.25V
Device CAT705 CAT706 CAT813
RESET @ 4.65 V x
RESET
MR x x
WDI x x x
WDO x x x
PFI @ 1.25 V @ 1.25 V @ 1.25 V
@ 4.65 V
x
www..com
Doc. No. MD-3030, Rev. D
2
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT705, CAT706, CAT813
(1)
ABSOLUTE MAXIMUM RATINGS Parameters Supply Voltage All other pins
Ratings 6.5 -0.3 to (VCC + 0.3) 20 471 330 -65 to 150 +300 2000 200
Units V V mA mW C C V V
Output Current RESET, RESET,WDO Continuous Power Dissipations (TA = +70C) SOIC 8-lead (derate 5.9mW/C above +70C) MSOP 8-lead (derate 4.1mW/C above +70C) Storage Temperature Lead Soldering (10 seconds max) ESD Rating: Human Body Model ESD Rating: Machine Model RECOMMENDED OPERATING CONDITIONS Parameter VCC (TA = -40C to +85C) All Other Pins Ambient Temperature
Range 1.0 to 5.5 -0.1 to (VCC + 0.1) -40 to +85
Units V V C
www..com
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.
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
3
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
ELECTRICAL OPERATING CHARACTERISTICS Typical values at TA = 25C and VCC = 5V for CAT705, CAT706 and CAT813 versions. (1) VCC = 3.3V for the CAT706 T/S versions; VCC = 3.0V for the CAT706 R version. Symbol Parameter Conditions CAT705 CAT706 CAT813 CAT706 (R/S/T Versions) CAT705 & CAT813 at -40C TA +85C CAT706 at -40C TA +85C CAT706T at -40C TA +85C CAT706S at -40C TA +85C CAT706R at -40C TA +85C Reset Threshold (1) Tempco Reset Threshold (1) Hysteresis tRD tRP VCC to Reset Delay Reset Active Timeout Period RESET Output High Voltage CAT705 & CAT706, VCC = VRST max, ISOURCE = -120A CAT705 & CAT706, VCC = VRST max, ISOURCE = -30A CAT705 & CAT706, VCC = VRST min, ISINK = 3.2mA CAT705 &CAT706, VCC = 1.2V ISINK = 100A CAT813, VCC = VRST max, ISOURCE = -120A CAT813, VCC = VRST max, ISOURCE = -30A CAT813, VCC = VRST min, ISINK = 3.2mA CAT813, VCC = 1.2V ISINK = 100A VCC - 1.5V V 0.8 x VCC 0.4 V 0.3
(2)
Min
Typ 6 4
Max 17 12 4.75 4.50 3.15 3.00 2.70
Units A A V V V V V ppm/C mV mV s
ICC
Supply Current
4.50 4.25 3.00 2.85 2.55
4.65 4.40 3.08 2.93 2.63 40
VRST
Reset Threshold
CAT705 & CAT813 CAT706 VCC = VTH to (VTH - 100mV) 140 VCC - 1.5V 0.8 x VCC
10 5 20 200 400
ms
VOH
V 0.4 0.3
VOL
RESET Output Low Voltage
VOH
RESET Output High Voltage
VOL
RESET Output Low Voltage
www..com
Notes: (1) Limits are guaranteed by design and not production tested. (2) The RESET short-circuit current is the maximum pull-up current when reset is driven low by a bidirectional output. 4
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
Doc. No. MD-3030 Rev. D
CAT705, CAT706, CAT813
ELECTRICAL OPERATING CHARACTERISTICS (continued) Typical values at TA = 25C and VCC = 5V for CAT705, CAT706, and CAT813 versions; VCC = 3.3V for the CAT706 T/S versions; VCC = 3.0V for the CAT706 R version. Symbol tWD tWP VIL VIH Parameter Watchdog Timeout Period WDI Pulse Width WDI Input Voltage WDI Input Current
(3)
Conditions
Min 1.00
Typ 1.6
Max 2.25 0.3 x VCC
Units s ns V A
WATCHDOG INPUT VIL = 0.4 V, VIH = 0.8 x VCC 50 0.7 x VCC WDI = VCC, Time Average WDI = 0V, Time Average VRST (max) < VCC < 3.6 V ISOURCE = -500 A 4.5 V < VCC < 5.5 V, ISOURCE = -800 A VRST (max) < VCC < 3.6 V, ISINK = +500 A 4.5 V < VCC < 5.5 V, ISINK = 1.2 mA 0.1 -150 0.8 x VCC VCC - 1.5 VCC - 0.25 V 0.3 0.4 50 -50 150
(4)
VW_OH WDO Output Voltage VW_OL
MANUAL RESET INPUT VIL VIH tPB tPDLY Input Voltage MR Pull-up Current MR Pulse Width MR low to Reset Delay MR PFI Input Threshold PFI Input Current VRST (max) < VCC < 3.6 V, ISOURCE = -500 A 4.5 V < VCC < 5.5 V, ISOURCE = -800 A VRST (max) < VCC < 3.6 V, ISINK = +1.2 mA 4.5 V < VCC < 5.5 V, ISINK = 3.2 mA
(5)
0.3 x VCC 0.7 x VCC = 0 V MR 40 1 5 VCC = 5 V 1.2 -25 0.8 x VCC VCC - 1.5V 0.4 1.25 0.01 1.3 25 70 140
V A s s V nA
POWER-FAIL INPUT
VP_OH Output Voltage PFO VP_OL
V 0.3 0.4
www..com
Notes: (3) WDI is internally serviced within the watchdog period if WDI is left open. (4) The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to a three-stated output device can be disabled in the tristate mode as long as the leakage current is less than 10A and a maximum capacitance of less than 200pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200A when active. (5) for CAT705 & CAT706 & RESET for CAT813. RESET
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
5
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
TYPICAL ELECTRICAL OPERATING CHARACTERISTICS TABLES
VCC Supply Current vs. Temperature
NORMALIZED RESET THRESHOLD (V)
Normalized Reset Threshold Voltage vs. Temperature
1.06 1.04 1.02 1.00 0.98 0.96 0.94 -40
9
SUPPLY CURRENT (A)
8 7 6 5 4 3 2 1 -40 -20
0
20
40
60
80 100 120
-20
0
20
40
60
80
100
TEMPERATURE (C)
TEMPERATURE (C) TEMPERATURE (C)
www..com
Doc. No. MD-3030 Rev. D
6
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT705, CAT706, CAT813
FUNCTIONAL DESCRIPTION
PROCESSOR RESET The CAT705, CAT706 & CAT813 detect supply voltage (VCC) conditions that are below the specified voltage trip value (VRST) and provide a reset output to maintain correct system operation. On power-up, RESET (or RESET for the CAT813) are kept active for a minimum delay tRP of 140ms after the supply voltage (VCC) rises above VRST to allow the power supply and processor to stabilize. When VCC drops below the voltage trip value (VRST), the reset output signals RESET (or RESET) are pulled active. RESET (or RESET) is specifically designed to provide the reset input signals for processors. This provides reliable and consistent operation as power is turned on, off or during brownout conditions by maintaining the processor operation in known conditions. MANUAL RESET The CAT705, CAT706 & CAT813 each have a Manual Reset (MR ) input to allow for alternative control of the reset outputs. The input is designed for direct MR connection to a pushbutton (see Figure 1). The MR input is internally pulled up by 52k resistor and must be pulled low to cause the reset output to go active. Internally, this input is debounced and timed such that RESET (or RESET) signals of at least 140ms minimum will be generated. The min 140ms tRP delay commences as the Manual Reset input is released from the low level. (see Figure 2)
MR VCC GND PFI
WDO RESET/RESET WDI PFO
CAT705 CAT706 CAT813
Figure 1. Pushbutton RESET
tPB tPDLY VIL tRP RESET VOH VOL VIH
MR
RESET
Figure 2. Timing Diagram - Pushbutton RESET
www..com
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
7
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
WATCHDOG TIMER The CAT705, CAT706, & CAT813 provide a Watchdog input (WDI). The watchdog timer function controls the watchdog output (WDO) signal and forces the WDO to be low (active) when the WDI input does not have a transition from low-to-high or high-to-low within 1.6s typical. If a transition occurs on the WDI input pin prior to the watchdog time-out, the watchdog timer is restarted. The timing diagram is shown in Figure 3. The watchdog timer starts as soon as reset condition becomes inactive. When the VCC supply drops below the reset threshold, the WDO output becomes active and goes low independently of the watchdog timing stage. Figure 4 below shows a typical implementation of a watchdog function. Any processor signal that repeats dependant on the normal operation of the processor or directed by the software operating on the processor can be used to strobe the watchdog input. The most reliable is a dedicated I/O output transitioned by a specific software instruction. The watchdog can be disabled by floating (or tristating) the WDI input (see Figure 5). If the watchdog is disabled the WDI pin will be pulled low for the first th 7/8 's of the watchdog period (tWD) and pulled high for th the last 1/8 of the watchdog period. This pulling low of the WDI input and then high is used to detect an open or tri-state condition and will continue to repeat until the WDI input is driven high or low. For most efficient operation of devices with the watchdog function the WDI input should be held low the majority of the time and only strobed high as required to reset the watchdog timer.
tWP tWD +5 V WDI 0V +5 V WDO 0V +5 V RESET 0V RESET EXTERNALLY TRIGGERED BY MR +5 V (RESET) 0V (() Are for CAT813 Only) tRS tWD tWD
Figure 3. Watchdog Timing Diagram
PIC C MCLR ADDRESS DECODER
MR VCC
WDO RESET/RESET WDI PFO
www..com
GND PFI
CAT705 CAT706 CAT813
Figure 4. Watchdog Timer Circuit
Doc. No. MD-3030 Rev. D
8
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT705, CAT706, CAT813
VCC MR VCC GND PFI WDO RESET/RESET WDI PFO Tristate
CAT705 CAT706 CAT813
150k
C
OUTPUT
110k
Figure 5. Watchdog Disable Circuit
VCC VRST (MAX) VRST VRST (MIN)
tRD RESET (CAT705 & CAT706)
VOH
RESET Slews with VCC
RESET (CAT813)
VOL
Figure 6. Timing Diagram - Power Down
VRST (MAX) VRST VRST (MIN)
VCC
tRP RESET (CAT705 & CAT706) VOH
www..com
VOL RESET (CAT813)
Figure 7. Timing Diagram - Power Up
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
9
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
APPLICATION NOTES
P's with Bidirectional Reset Pins The RESET output can be pulled low by processors like the 68HC11 allowing for a system reset issued by the processor. The maximum pullup current that can be sourced by the CAT705 & CAT706 1.5mA (and by the CAT706 T/R/S is 800A) allowing the processor to pull the output low even when the CAT70x is pulling it high. Power Transients Generally short duration negative-going transients of less than 2s on the power supply at VRST minimum will not cause a reset condition. However the lower the voltage of the transient the shorter the required time to cause a reset output. These issues can usually be remedied by the proper location of bypass capacitance on the circuit board.
OUTPUT VALID CONDITIONS
The RESET output uses a push-pull output which can maintain a valid output down to a VCC of 1.0 volts. To sink current below 0.8V a resistor can be connected from RESET to Ground (see Figure 8.) This arrangement will maintain a valid value on the RESET output during both power up and down but will draw current when the RESET output is in the high state. A resistor value of about 100k should be adequate in most situations to maintain a low condition valid output down to VCC equal to 1.0V.
C MR VCC GND PFI WDO RESET/RESET RESET/RESET WDI
CAT705 CAT706 CAT813
100k
PFO
Figure 8. RESET Valid for VCC < 1.0V
5V Push Switch MR UNREGULATED DC VCC GND PFI WDO RESET/RESET RESET/RESET WDI PFO I/O LINE INTERRUPT VCC NMI C
CAT705 CAT706 CAT813
www..com
Figure 9. Typical Operating Circuit
Doc. No. MD-3030 Rev. D
10
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT705, CAT706, CAT813
PACKAGE OUTLINE DRAWINGS
MSOP 8-Lead 3.0 x 3.0mm (Z)
(1) (2)
SYMBOL
MIN
NOM
MAX
A A1 A2 b c D
E E1
1.10 0.05 0.75 0.22 0.13 2.90 4.80 2.90 0.40 3.00 4.90 3.00 0.65 BSC 0.60 0.95 REF 0.25 BSC 0 6 0.80 0.10 0.85 0.15 0.95 0.38 0.23 3.10 5.00 3.10
E E1 e L L1 L2
TOP VIEW
D
A
A2
DETAIL A
A1
e SIDE VIEW
b
c END VIEW
L2 L L1
www..com
DETAIL A
Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-187
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
11
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
SOIC 8-Lead 150 mils (V)
(1) (2)
SYMBOL
MIN
NOM
MAX
A A1 b c
E1 E
1.35 0.10 0.33 0.19 4.80 5.80 3.80 1.27 BSC 0.25 0.40 0
1.75 0.25 0.51 0.25 5.00 6.20 4.00 0.50 1.27 8
D E E1 e h L
PIN # 1 IDENTIFICATION TOP VIEW
D
h c
A1
A
e
b
L
SIDE VIEW
END VIEW
www..com
Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012.
Doc. No. MD-3030 Rev. D
12
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
CAT705, CAT706, CAT813
EXAMPLE OF ORDERING INFORMATION (1)
Prefix CAT
Optional Company ID
Device # 706
Product Number
Suffix R V
Package V: SOIC 8-Lead Z: MSOP 8-Lead Reset Threshold Voltage Blank: See Ordering Part Number table T: 3.08V S: 2.93V R: 2.63V
I
-G
Lead Finish G:NiPdAu
T3
Tape & Reel T: Tape & Reel 3: 3000/Reel
705 706 813
Temperature Range I = Industrial (-40C to 85C)
TOP MARKING INFORMATION (FOR ALL THRESHOLDS)
NiPdAu Finish (-G) Device # CAT705 CAT706 CAT813 Package MSOP MSOP MSOP Top Marking ABRT ABRT ABRS Device # CAT705 CAT706 CAT813 Package SOIC SOIC SOIC Top Marking CAT705V CAT706 V CAT813V
ORDERING PART NUMBER
Order Part Number CAT705VI-G CAT705ZI-G CAT706VI-G CAT706ZI-G CAT706RVI-G CAT706RZI-G CAT706SVI-G CAT706SZI-G CAT706TVI-G CAT706TZI-G CAT813VI-G CAT813ZI-G
www..com
Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) (3) (4) The standard lead finish is NiPdAu. This device used in the above example is a CAT706RVI -GT3 (2.63V, SOIC 8-Lead, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/reel) Contact factory for package availability.
Threshold Voltage 4.65V 4.40V 2.63V 2.93V 3.08V 4.65V
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice
13
Doc. No. MD-3030, Rev. D
CAT705, CAT706, CAT813
REVISION HISTORY
Date 21-Jan-08 3-Nov-08 Rev. A B Description Initial Issue Change logo and fine print to ON Semiconductor Update Features Update Applications Update Description Update Block Diagram Update Recommended Operating Conditions Update Electrical Operating Characteristics Update Watchdog Timing Update Top Marking Information Update Electrical Operating Characteristics
27-Oct-09
C
06-July-10
D
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.
www..com
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-3030 Rev. D
14
(c) 2010 SCILLC. All rights reserved. Characteristics subject to change without notice

▲Up To Search▲

Price & Availability of CAT705

	To Download CAT705 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .