MB3793-42PF FUJITSU [Fujitsu Component Limited.], MB3793-42PF Datasheet
MB3793-42PF
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MB3793-42PF 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 4 5 GND (FPT-8P-M01) (FPT-8P-M02) Pin No. Symbol INH ...
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... Pulse generator 1 CK1 8 Pulse generator 2 7 CK2 ≅ 3 µA ≅ 30 µ RSFF2 RSFF1 Q R Comp. S Reference voltage generator ≅ 1. REF To GND of all blocks MB3793- ≅ 590 kΩ − ≅ 240 kΩ 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 µs 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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... INH I OL − ⎯ −55 Tstg Value Symbol Min Typ V 1.2 5 − 0.001 0 0.001 0 0.1 WD −40 +25 Ta MB3793-42 Unit Max + +10 mA 200 mW +125 °C Unit Max 6.0 V ⎯ µF 10 µF 1 ⎯ 1500 ms +85 °C 5 ...
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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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... TP = 0.01 µ 0.1 µ 0.1 µ ⎯ t CKW ⎯ t CKT Rising tr Falling tf MB3793- +25° Value Unit Min Typ Max 80 130 180 ms 7 ⎯ ⎯ 500 ns ⎯ ⎯ µs 20 ⎯ ⎯ ...
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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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... 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 ...
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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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... 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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... Power Current - Power Voltage 40 Watchdog timer monitoring INH 30 25 Watchdog timer stopping 20 Reset 15 < MB3793- kHz Duty = 10 0.01 µF 0.1 µF 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 −40 °C 4 ...
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... Operating ambient temperature Ta (°C) Watchdog Timer Monitoring Time - Operating ambient temperature −40 −20 0 +20 +40 +60 +80 +100 Operating ambient temperature Ta (°C) MB3793-42 rising) CC (Continued) 15 ...
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... MB3793-42 (Continued) Power-on Reset Hold Time - −40 ° +25 ° +85 °C 1 −1 10 −4 −3 −2 − Power-on reset time setting capacitance C (µF) TP Watchdog Timer Monitoring Time - C (under Ta condition −40 ° +85 ° ...
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... When C TP ≈ 130 [ms ≈ 15 [ms ≈ 10 [ms RESET RESET V CC CK1 8 CK Micro- processor 1 GND GND CK2 7 4 and C ) and set time TP TW (µ Remark 100 = 0.01 µF, TW MB3793-42 RESET Micro- processor 2 GND 17 ...
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... 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- processor CK GND RESET Micro- Micro- CK processor2 HALT HALT GND GND ...
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... Applying a negative voltage of −0 less to an LSI may generate a parasitic transistor, resulting in malfunction. ORDERING INFORMATION Part number MB3793-42PF- MB3793-42PNF- MB3793-42PF- E1 MB3793-42PNF- E1 RoHS Compliance Information of Lead (Pb) Free version The LSI products of Fujitsu with “E1” are compliant with RoHS Directive , and has observed the standard of lead, cadmium, mercury, Hexavalent chromium, polybrominated biphenyls (PBB) , and polybrominated diphenyl ethers (PBDE) ...
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... MB3793-42 MARKING FORMAT (Lead Free version) Lead Free version Lead Free version 20 3793-A E1XXXX XXX INDEX 3793-A XXXX E1 XXX SOP-8 (FPT-8P-M01) SOP-8 (FPT-8P-M02) ...
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... LABELING SAMPLE (Lead free version) MB123456P - 789 - GE1 (3N) 1MB123456P-789-GE1 (3N)2 1561190005 107210 1,000 MB123456P - 789 - GE1 2006/03/01 MB123456P - 789 - GE1 1561190005 lead-free mark JEITA logo JEDEC logo G Pb 1000 QC PASS PCS ASSEMBLED IN JAPAN 0605 - Z01A 1000 1/1 Lead Free version MB3793-42 21 ...
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... MB3793-42 MB3793-42PF- E1, MB3793-42PNF- RECOMMENDED CONDITIONS OF MOISTURE SENSITIVITY LEVEL Item Mounting Method Mounting times Storage period Storage conditions [Temperature Profile for FJ Standard IR Reflow] (1) IR (infrared reflow) 260 °C 255 °C 170 °C to 190 °C RT (a) Temperature Increase gradient : Average 1 °C °C/s (b) Preliminary heating (c) Temperature Increase gradient : Average 1 ° ...
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... Note 4) Pins width do not include tie bar cutting remainder. +0.03 0.17 –0.04 +.001 .007 –.002 5.30±0.30 7.80±0.40 Details of "A" part "A" 0.13(.005) M Dimensions in mm (inches). Note: The values in parentheses are reference values. MB3793-42 1.27 mm 5.3 × 6.35 mm Gullwing Plastic mold 2.25 mm MAX 0.10 g P-SOP8-5.3×6.35-1.27 +0.25 2.00 –0.15 (Mounting height) +.010 .079 –.006 0.25(.010) 0~8 ˚ ...
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... MB3793-42 (Continued) 8-pin plastic SOP (FPT-8P-M02) 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 Lead pitch Package width × package length Lead shape Sealing method Mounting height Weight Note These dimensions include resin protrusion. ...
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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 ...