CAT1027 CATALYST [Catalyst Semiconductor], CAT1027 Datasheet
CAT1027
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CAT1027 Summary of contents
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... The auxiliary high impedance comparator drives the open drain output, V voltage is below 1.25V threshold. CC The CAT1027 is designed with a 1.6 second watchdog timer circuit that resets a system to a known state if software or a hardware glitch halts or “hangs” the system. The CAT1027 features a watchdog timer interrupt input, WDI. ...
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... CAT1026, CAT1027 BLOCK DIAGRAM EXTERNAL LOAD START/STOP SDA V CC Monitor RESET Controller - V REF Auxiliary Voltage Monitor RESET (CAT1026) V SENSE + V LOW - V REF PIN CONFIGURATION DIP Package (P, L) SOIC Package (J, W) TSSOP Package (U, Y) MSOP Package ( LOW V CC ...
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... AUXILIARY VOLTAGE MONITOR INPUT SENSE The V SENSE is compared against CAT1026 and CAT1027 internal reference voltage of 1.25V typically. Whenever the input voltage is lower than 1.25V, the open drain VLOW output will be driven low. An external resistor divider is used to set the voltage level to be sensed. ...
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... CAT1026, CAT1027 ABSOLUTE MAXIMUM RATINGS Temperature Under Bias ................. – +125 C Storage Temperature ....................... – +150 C Voltage on any Pin with (1) Respect to Ground ........... –2 with Respect to Ground ............ –2 7 Package Power Dissipation Capability ( .................................. 1 OPERATING CHARACTERISTICS 5.5 V and over the recommended temperature conditions unless otherwise specified. ...
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... CAT1026, CAT1027 Max Units ...
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... CAT1026, CAT1027 VOLTAGE MONITOR AND RESET CIRCUIT AC CHARACTERISTICS ...
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... The Watchdog Timer provides an independent protection for microcontrollers. During a system failure, the CAT1027 device will provide a reset signal after a time-out interval of 1.6 seconds for a lack of activity. CAT1027 is designed with the Watchdog timer feature on the WDI pin. If WDI LOW does not toggle within 1.6 second intervals, the reset condition will be generated on reset output ...
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... CAT1026, CAT1027 Figure 1. RESET Output Timing RVALID RESET RESET Figure 2. Auxiliary Voltage Monitor Timing V REF V SENSE V LOW Figure 3. Auxiliary Voltage Monitor Externally adjustable threshold V TH-ADJ Doc. No. 3010, Rev GLITCH t PURST RPD1 t RPD2 t RPD2 AUX CAT1026/27 V LOW SENSE ...
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... Figure 5. Write Cycle Timing SCL SDA 8TH BIT BYTE n device, and is defined as a HIGH to LOW transition of SDA when SCL is HIGH. The CAT1026 and CAT1027 monitor the SDA and SCL lines and will not respond until 2 C Bus data this condition is met. STOP Condition A LOW to HIGH transition of SDA when SCL is HIGH determines the STOP condition ...
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... If the device has been selected along with a write operation, it responds with an acknowledge after receiving each 8-bit byte. When the CAT1026 and CAT1027 begin a READ mode it transmits 8 bits of data, releases the SDA line and monitors the line for an acknowledge. Once it receives this acknowledge, the CAT1026 and CAT1027 will continue to transmit data ...
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... Page Write The CAT1026 and CAT1027 write bytes of data in a single write cycle, by using the Page Write operation. The page write operation is initiated in the same manner as the byte write operation, however instead of terminating after the initial byte is transmitted, the Master is allowed to send additional bytes ...
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... SCL SDA Doc. No. 3010, Rev. K Read Operations The READ operation for the CAT1026 and CAT1027 is initiated in the same manner as the write operation with one exception, the R/W bit is set to one. Three different READ operations are possible: Immediate/Current Address READ, Selective/Random READ and Sequential READ ...
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... After the CAT1026 and CAT1027 acknowledge, the Master device sends the START condition and the slave address again, this time with the R/W bit set to one. The CAT1026 and CAT1027 then respond with an acknowledge and sends the 8-bit byte requested. The master device does not send an acknowledge but will generate a STOP condition ...
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... CAT1026, CAT1027 PACKAGE OUTLINES 8-LEAD 300 MIL WIDE PLASTIC DIP ( 0.100 (2.54) BSC 0.045 (1.14) 0.060 (1.52) 0.014 (0.36) 0.022 (0.56) Notes: 1. Complies with JEDEC Publication 95 MS001 dimensions; however, some of the dimensions may be more stringent. 2. All linear dimensions are in inches and parenthetically in millimeters. Doc. No. 3010, Rev. K ...
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... All linear dimensions are in inches and parenthetically in millimeters. 3. Lead coplanarity is 0.004" (0.102mm) maximum. 0.1497 (3.80) 0.1574 (4.00) D 0.0532 (1.35) 0.0688 (1.75) 0.013 (0.33) 0.020 (0.51) 0.0099 (0.25 0.0196 (0.50) 0.0075 (0.19) 0.0098 (0.25) 0.016 (0.40) 0.050 (1.27) Dimension D Pkg Min 8L 0.1890(4.80) 15 CAT1026, CAT1027 0.2284 (5.80) 0.2440 (6.20) 0.0040 (0.10) 0.0098 (0.25) Max 0.1968(5.00) Doc No. 3010, Rev. K ...
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... CAT1026, CAT1027 8-LEAD TSSOP (U, Y) Doc. No. 3010, Rev ...
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... This part is compliant with JEDEC Specification MO-187 Variations AA. (6) Lead span/stand off height/coplanarity are considered as special characteristics. (S) (7) Controlling dimensions in inches. [mm] 0.0150 0.38 0.28 0.0110 0.1970 0.1890 0.1220 3.10 2.90 0.1142 0.0059 0.039 [0.10] MAX. S 0.0020 0.0091 0.0051 3.10 0˚ - 6˚ 2.90 17 CAT1026, CAT1027 5.00 S 4.80 0.0374 0.95 0.0295 0.75 0.15 S 0.05 0.0150 0.38 0.0110 0.28 WITH PLATING 0.23 0.13 WITH PLATING 0.0118 [0.30] REF. SECTION Doc No ...
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... CAT1026, CAT1027 TDFN 3X3 PACKAGE (RD4, ZD4 PIN 1 INDEX AREA NOTE: 1. ALL DIMENSION ARE IN mm. ANGLES IN DEGREES. 2. COPLANARITY SHALL NOT EXCEED 0.08 mm. 3. WARPAGE SHALL NOT EXCEED 0.10 mm. 4. PACKAGE LENGTH / PACKAGE WIDTH ARE CONSIDERED AS SPECIAL CHARACTERISTIC(S) 5. REFER JEDEC MO-229 / WEEC Doc. No. 3010, Rev. K ...
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... The device used in the above example is a CAT1026JI-30TE13 (Supervisory circuit with serial 2k CMOS EEPROM, SOIC, Industrial Temperature, 3.0-3.15V Reset Threshold Voltage, Tape and Reel). Suffix J I Temperature Range I = Industrial (-40˚C to 85˚ Extended (-40˚C to +125˚C) 19 CAT1026, CAT1027 -30 TE13 Tape & Reel SOIC: 2000/Reel TSSOP: 2000/Reel MSOP: 2500/Reel TDFN: 2000/Reel Reset Threshold Voltage 45: 4 ...
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REVISION HISTORY Date Rev. 9/25/2003 F 11/7/2003 G 4/12/2004 H 11/1/2004 I 11/04/04 J 11/11/04 M Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: 2 DPP ™ AE ™ ...