MB3793-42PNF-G-JN-6E1 Fujitsu Semiconductor America Inc, MB3793-42PNF-G-JN-6E1 Datasheet
MB3793-42PNF-G-JN-6E1
Specifications of MB3793-42PNF-G-JN-6E1
Related parts for MB3793-42PNF-G-JN-6E1
MB3793-42PNF-G-JN-6E1 Summary of contents
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... MB3793-42 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 fail-safe function for various application systems ...
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... MB3793-42 PIN ASSIGNMENT PIN DESCRIPTION Pin No. Symbol Description 1 RESET Outputs reset 2 CTW Sets monitoring time 3 CTP Sets power-on reset hold time 4 GND Ground 2 (TOP VIEW RESET 2 7 CTW 3 6 CTP GND 4 5 (DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) Pin No. Symbol INH 7 CK2 8 CK1 CK1 ...
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... BLOCK DIAGRAM all blocks CC 3 CTP Output buffer Comp RESET 6 INH Watchdog 2 CTW timer Pulse generator 1 8 CK1 Pulse generator 2 7 CK2 RSFF2 RSFF1 Q R Comp. S Reference voltage generator V 1.24 V REF To GND of all blocks MB3793- 590 240 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 within 1 s when the power is cut or falls abruptly. 2. Comp. O Comp comparator to control the reset signal (RESET) output and compares the threshold voltage with the voltage at the CTP terminal for setting the power-on reset hold time ...
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... Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand. Rating Symbol Min V 0 CK1 V 0.3 CK2 V INH Tstg 55 Value Symbol Min Typ V 1.2 5 0.001 0 0.001 0 0 MB3793-42 ( Unit Max 200 mW 125 C Unit Max 6 1500 ...
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... MB3793-42 ELECTRICAL CHARACTERISTICS 1. DC Characteristics Parameter Symbol I CC1 Power current I CC2 V Detection voltage V Detection voltage V SHYS hysteresis difference V CK input threshold voltage V CK input hysteresis V CHYS V INH input voltage V I Input current (CK1,CK2,INH) V Reset output voltage V Reset-output minimum V power voltage *1: At clock input terminals CK1 and CK2, the pulse input frequency is 1 kHz and the pulse amplitude *2: Inhibition input is at High level ...
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... CK input pulse duration CK input pulse cycle Reset (RESET) output transition time *: The voltage range is 10% to 90% at testing the reset output transition time. Symbol Conditions CKW t CKT Rising tr Falling tf MB3793- Value Unit Min Typ Max 80 130 180 ms 7 500 500 ns 500 ns 7 ...
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... MB3793-42 TIMING DIAGRAM 1. Basic operation (Positive clock pulse CCL CK1 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) (14) ...
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... Basic operation (Negative clock pulse CCL CK1 CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) (3) (4) (5) (5) t CKW (6) (7) (8) (9) (10) MB3793-42 (11) (12) (13) (14) 9 ...
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... CK1 CK2 V th 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 long as the input clock pulse CKW t CKT the time that allows the MB3793 to monitor the period twice as ...
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... Inhibition operation (Positive clock pulse CCL CK1 CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) (3) (4) (5) (5) t CKW (6) (7) (8) (9) (10) (11) MB3793-42 (12) (13) (14) 11 ...
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... H CTW V L Note: The MB3793 watchdog timer monitors Clock 1 (CK1) and Clock 2 (CK2) pulses al- ternately. When a CK2 pulse is detected after detecting a CK1 pulse, the monitor- ing time setting capacity (C When two consecutive pulses occur on one side of this alternation before switch- ing, the second pulse is ignored. In the above figure, pulses *1 and *2 are ignored. ...
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... can be calculated by the following equation. ), the voltage of the CTP terminal falls and a reset SL , resetting is canceled and the watchdog timer restarts. th after power-off, a reset signal is output reset signal is released. CCL TIMING DIAGRAM 2. Basic operation MB3793- switches resetting is canceled TP is about 4 ...
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... MB3793-42 TYPICAL CHARACTERISTICS Power Current - Power Voltage 40 Watchdog timer monitoring INH 30 25 Watchdog timer stopping 20 Reset MB3793- kHz Duty 0. 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10 Power voltage V Reset Output Voltage - Reset Output Current (P-MOS side) 5 4.9 4 ...
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... Watchdog Timer Reset Time - Ambient Temperature (when monitoring 100 Ambient temperature eset-on Reset Time - Ambient Temperature 260 240 220 200 180 160 140 120 100 Ambient temperature Watchdog Timer Monitoring Time - Ambient Ambient temperature MB3793-42 (when V rising 100 Temperature 100 (Continued) 15 ...
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... MB3793-42 (Continued) Power-on Reset Time - Power-on reset time setting capacitance Watchdog Timer Monitoring Time - C (under Ta condition Watchdog timer monitoring time setting capacitance Capacitance Capacitance Watchdog Timer Monitoring Time - Watchdog timer monitoring time setting capacitance Reset Time - C Capacitance Power-on reset time setting capacitance ...
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... Equation of time-setting capacitances (C t (ms (ms However, when (ms (ms Value and 1300 1500 3 (Example) When C = 0.1 F and 130 [ms [ms [ms RESET RESET V CC CK1 8 CK Micro- processor 1 GND GND CK2 7 4 and C ) and set time Remark 100 = 0. MB3793-42 RESET Micro- processor 2 GND 17 ...
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... MB3793-42 APPLICATION EXAMPLE 1. Monitoring Single Clock Watchdog Timer Stopping RESET 2 CTW MB3793 3 CTP 8 CK1 INH GND CK2 INH RESET 2 CTW RESET V MB3793 3 CTP 8 CK CK1 processor1 7 GND CK2 4 RESET V CC Micro- CK processor GND RESET Micro- Micro- CK processor2 HALT HALT GND GND ...
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... Do not apply a negative voltage - Applying a negative voltage of 0 less to an LSI may generate a parasitic transistor, resulting in malfunction. ORDERING INFORMATION Part number MB3793-42P MB3793-42PF MB3793-42PNF resistors in series. Package 8-pin plastic DIP (DIP-8P-M01) 8-pin plastic SOP (FPT-8P-M01) 8-pin plastic SOP (FPT-8P-M02) MB3793-42 Remarks 19 ...
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... MB3793-42 PACKAGE DIMENSIONS 8-pin plastic DIP (DIP-8P-M01) 4.36(.172)MAX 3.00(.118)MIN +0.30 0.99 –0 +.012 .039 –0 +0.35 0.89 –0.30 +.014 .035 –.012 1994 FUJITSU LIMITED D08006S-2C +0.40 9.40 –0.30 +.016 .370 –.012 1 PIN INDEX 6.20±0.25 (.244±.010) 0.51(.020)MIN 0.25± ...
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... M Dimensions in mm (inches) . Note : The values in parentheses are reference values. MB3793-42 +0.03 –0.04 +.001 –.002 Details of "A" part +0.25 2.00 –0.15 (Mounting height) +.010 .079 – ...
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... MB3793-42 (Continued) 8-pin plastic SOP (FPT-8P-M02) +0.25 +.010 * 1 5.05 .199 –0.20 –.008 8 1 1.27(.050) 0.10(.004) 0.10(.004) 2002 FUJITSU LIMITED F08004S-c-4 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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... MB3793-42 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 ...