MB3793-30APNF-G-JN-6E1 Fujitsu Semiconductor America Inc, MB3793-30APNF-G-JN-6E1 Datasheet
MB3793-30APNF-G-JN-6E1
Specifications of MB3793-30APNF-G-JN-6E1
Related parts for MB3793-30APNF-G-JN-6E1
MB3793-30APNF-G-JN-6E1 Summary of contents
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... DESCRIPTION The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog timer. A reset signal is output when the power is cut or falls abruptly. When the power recovers normally after resetting, a power-on reset signal is output to microprocessor units (MPUs). An internal watchdog timer with two inputs for system operation diagnosis can provide a fall-safe function for various applicaiton systems ...
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... MB3793 -30A PIN ASSIGNMENT PIN DESCRIPTION Pin no. Symbol Descriptions 1 RESET Outputs reset pin Watchdog timer monitor time 2 CTW setting pin Power-on reset hold time set- 3 CTP ting pin 4 GND Ground pin 2 (TOP VIEW RESET 2 7 CTW 3 6 CTP 4 5 GND (FPT-8P-M01) ...
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... BLOCK DIAGRAM all blocks CC CTP 3 1 RESET Output circuit INH 6 CTW 2 Watchdog timer Pulse generator 1 CK1 8 Pulse generator 2 7 CK2 . . Logic circuit Comp.S Reference voltage generator . REF To GND of all blocks MB3793 -30A 360 240 k 4 GND 3 ...
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... Comp comparator with hysteresis to compare the reference voltage with a voltage (V of dividing the power voltage (V This function enables the MB3793 to detect an abnormality when the power is cut or falls abruptly. 2. Output circuit The output circuit contains a RESET output control comparator that compares the voltage at the CTP pin to the threshold voltage to release the RESET output if the CTP pin voltage exceeds the threshold value ...
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... Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand. Symbol Conditions Min V 0 CK1 V 0.3 CK2 I INH Tstg 55 Symbol Conditions Min V 1 0.001 TP C 0.001 MB3793 -30A ( Rating Unit Max 0 0 200 mW 125 C Value Unit Typ Max 3.3 6.0 V — — ...
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... MB3793 -30A ELECTRICAL CHARACTERISTICS 1. DC Characteristics Parameter Symbol Power supply current Detection voltage Detection voltage hysteresis V difference V Clock-input threshold voltage V Clock-input hysteresis V Inhibition-input voltage Input current (CK1, CK2, INH) V Reset output voltage Reset-output minimum power V voltage * : The values enclosed in parentheses ( ) are setting assurance values. ...
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... DIAGRAM 1. Basic operation (Positive clock pulse CK1 t CKT CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) (3) t CKW (4)(5) (5) (6) (7) (8) (9) (10) MB3793 -30A (11) (12) (13) 7 ...
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... MB3793 -30A 2. Basic operation (Negative clock pulse CK1 t CKT CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) (3) (4)(5) ( CKW (6) (7) (8) (9) (10) (11) (12) (13) ...
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... CTP V H CTW V L RESET Note : The MB3793 can monitor only one clock. The MB3793 checks the clock signal at every other input pulse. Therefore, set watchdog timer monitor time t to monitor the period twice as long as the input clock pulse. t CKW t CKT t ...
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... MB3793 -30A 4. Inhibition operation (Positive clock pulse CK1 CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) ( CKW (4)(5) (5) (6) (7) (11) (8) (9) (10) (12) (13) ...
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... V H CTW V L Note : The MB3793 watchdog timer monitors Clock1 (CK1) and Clock2 (CK2) pulses alternately. When a CK2 pulse is detected after detecting a CK1 pulse, the monitoring time setting capacity (C ) switches to charging from discharging. TW When two consecutive pulses occur on one side of this alternation before switching, the second pulse is ignored ...
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... Clock monitoring To use the MB3793 while monitoring only one clock, connect clock pins CK1 and CK2. Although the MB3793 operates basically in the same way as when monitoring two clocks, it monitors the clock signal at every other input pulse. See “3. Single-clock input monitoring (positive clock pulse)” under “ DIAGRAM.” ...
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... The value with V The MB3793 repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses clock pulse is input, the MB3793 repeats operations (6) and (7). ( lowered to the fall-time detected voltage (V CC MB3793 outputs a reset signal (setting the RESET pin to “L” level from “H” level). ...
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... MB3793 -30A TYPICAL CHARACTERISTICS Power supply current vs. power supply voltage 50 Watchdog timer monitoring INH Watchdog timer stopping INH Power supply voltage V Reset output voltage vs. reset output current (P-MOS side) 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2 Reset output current I Note : Without writing the value clearly, VCC = 3 ...
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... Watchdog timer reset time vs. Ambient temperature (When monitoring 3 Ambient temperature Power-on reset hold time vs. Ambient temperature 200 180 160 140 120 100 (V) Ambient temperature Watchdog timer monitoring time vs. Ambient temperature 100 120 40 20 Ambient temperature MB3793 -30A (When V rising 3 100 120 = 3 100 120 (Continued) 15 ...
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... MB3793 -30A (Continued) Power-on reset time vs Power-on reset time setting capacitance Watchdog timer monitoring time vs. C capacitance Watchdog timer monitoring time setting capacitance C 16 capacitance Reset time vs Power-on reset time setting capacitance capacitance ...
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... APPLICATION EXAMPLE 1. (1) Supply voltage monitor and watchdog timer (1-clock monitor GND * : Use a capacitor with less leakage current. The MB3793 monitors the clock (CK1,2) at every other input pulse. (2) Supply voltage monitor and watching timer (2-clock monitor CTW CTP INH GND * : Use a capacitor with less leakage current. ...
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... MB3793 -30A 2. Supply voltage monitor and watchdog timer stop INH CTW GND 3 CTP GND * : Use a capacitor with less leakage current. NOTES ON USE • Take account of common impedance when designing the earth line on a printed wiring board. • Take measures against static electricity. ...
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... ORDERING INFORMATION Part number MB3793-30AP 8-pin Plastic DIP MB3793-30APF 8-pin Plastic SOP MB3793-30APNF 8-pin Plastic SOL MB3793-30APFV 8-pin Plastic SSOP Package Marking 3793AN (DIP-8P-M01) 3793AN (FPT-8P-M01) 3793AN (FPT-8P-M02) 93AN (FPT-8P-M03) MB3793 -30A Remarks 19 ...
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... MB3793 -30A PACKAGE DIMENSIONS 8-pin Plastic SOP (FPT-8P-M01) +0.25 +.010 * 1 6.35 .250 –0.20 –.008 8 INDEX 1 1.27(.050) 0.10(.004) 0.10(.004) 2002 FUJITSU LIMITED F08002S-c-6 Note These dimensions include resin protrusion. Note These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. ...
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... M 0.50±0.20 (.020±.008) 0.60±0.15 (.024±.006) Dimensions in mm (inches) . Note : The values in parentheses are reference values. MB3793 -30A 1.55±0.20 (Mounting height) (.061±.008) 0.25(.010) 0~8 ˚ 0.15±0.10 (.006±.004) ...
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... MB3793 -30A 8-pin Plastic SSOP (FPT-8P-M03 3.50±0.10(.138±.004 INDEX 1 0.80(.031) 0.10(.004) 0.10(.004) 2002 FUJITSU LIMITED F08005S-c-3 Note Resin protrusion. (Each side : 0.15 (.006) Max) . Note These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. ...
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... TYP Dimensions in mm (inches) . Note : The values in parentheses are reference values. MB3793 -30A 15°MAX 7.62(.300) TYP 23 ...
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... MB3793 -30A FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in this document are presented solely for the purpose of reference to show examples of operations and uses of Fujitsu semiconductor device ...