MB3793-27A FUJITSU [Fujitsu Component Limited.], MB3793-27A Datasheet
MB3793-27A
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MB3793-27A 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 application systems ...
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... MB3793 -27A 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 3 CTP setting 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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... RESET Output circuit INH 6 CTW 2 Watchdog timer Pulse generator 1 CK1 8 Pulse generator 2 7 CK2 . . = 3 µ µ Logic circuit Comp.S Reference voltage generator . REF To GND of all blocks MB3793 -27A 295 kΩ − 240 kΩ 4 GND 3 ...
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... When V CC This function enables the MB3793 to detect an abnomality within 1 µs 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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... D Tstg — –55 Symbol Conditions Min V — 1 — – — 0.001 TP C — 0.001 TW Ta — –40 MB3793 -27A Rating Unit Max + +10 mA 200 mW °C +125 Value Unit Typ Max — 6.0 V — µF — 10 µF — ...
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... MB3793 -27A 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 V power 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 -27A (11) (12) (13) 7 ...
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... MB3793 -27A 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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... 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 WD long as the input clock pulse. t CKW t CKT ...
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... MB3793 -27A 4. Inhibition operation (Positive clock pulse CK1 CK2 INH V th CTP V H CTW V L RESET t PR (1) (2) ( CKW t CKT (4)(5) (5) (6) (7) (11) (8) (9) (10) (12) (13) ...
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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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... (µ 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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... TYPICAL CHARACTERISTICS Power supply current vs. power supply voltage Watchdog timer monitoring (V INH 15 10 MB3793-27A kHz Duty = 0.01 µF 0.1 µ 1.0 2.0 Power supply voltage 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 2.3 −1 −2 −3 ...
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... MB3793 -27A Reset output voltage vs. power supply voltage 7 Pull-up resistance 100 kΩ +85 ° +25 ° −40 ° Power supply voltage Watchdog timer reset time vs. Operating ambient temperature (When monitoring −40 °C to +85 ° +25 ° ...
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... Power-on reset hold time setting capacitance capacitance +25 °C − (µF) TW MB3793 -27A capacitance −40 ° +25 ° +85 °C −3 −2 − (µ ...
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... Supply voltage monitor and watchdog timer (1-clock monitor GND *: Use a capacitor with less leakage current. The MB3793 monitors the clock (CK1, CK2) at every other input pulse. 2. Supply voltage monitor and watchdog timer stop INH MB3793 2 CTW C ...
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... RESET Microprocessor 1 8 CK1 CK GND 7 GND CK2 4 and C ) and set time TP TW [µF] [µF] [µ Remark µF and µ MB3793 -27A V RESET Microprocessor 2 CK GND = ...
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... Part number MB3793-27APF- MB3793-27APNF- MB3793-27APFV- MB3793-27APF- E1 MB3793-27APNF- E1 MB3793-27APFV- 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) . The product that conforms to this standard is added “ ...
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... MARKING FORMAT (Lead Free version) Lead Free version INDEX Lead Free version Lead Free version INDEX 3793 − Y E1XXXX XXX 3793 − Y XXXX E1 XXX 93 − XXX XXX MB3793 -27A SOP-8 (FPT-8P-M01) SOP-8 (FPT-8P-M02) SSOP-8 (FPT-8P-M03) 19 ...
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... MB3793 -27A 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 20 lead-free mark JEITA logo JEDEC logo G Pb 1000 QC PASS PCS ASSEMBLED IN JAPAN 0605 - Z01A 1000 1/1 Lead Free version ...
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... Actual heating (d’) (e) Cooling Note : Temperature : the top of the package body (2) Manual soldering (partial heating method) Conditions : Temperature 400 °C MAX Times : 5 s max/pin E1, MB3793-27APFV- Condition IR (infrared reflow) , Manual soldering (partial heating method) 2 times Before opening From opening to the 2nd reflow opening was exceeded 5 ° ...
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... MB3793 -27A PACKAGE DIMENSIONS 8-pin plastic SOP (FPT-8P-M01) 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 Lead pitch Package width × package length Lead shape Sealing method Mounting height ...
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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 -27A 1.27 mm 3.9 × 5.05 mm Gullwing Plastic mold 1.75 mm MAX 0.06 g (Mounting height) 0.25(.010) 0.15±0.10 (.006±.004) (Stand off) ...
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... MB3793 -27A (Continued) 8-pin plastic SSOP (FPT-8P-M03) 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 Lead pitch Package width × package length Lead shape Sealing method Mounting height Weight ...
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... MB3793 -27A 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 ...