MB3773PF-ERE1 Fujitsu Semiconductor America Inc, MB3773PF-ERE1 Datasheet
MB3773PF-ERE1
Specifications of MB3773PF-ERE1
Related parts for MB3773PF-ERE1
MB3773PF-ERE1 Summary of contents
Page 1
FUJITSU MICROELECTRONICS DATA SHEET ASSP BIPOLAR Power Supply Monitor with Watch-Dog Timer MB3773 DESCRIPTION MB3773 generates the reset signal to protect an arbitrary system when the power-supply voltage momentarily is intercepted or decreased for the power-supply voltage ...
Page 2
MB3773 PIN ASSIGNMENT 2 (TOP VIEW RESET RESET REF 4 5 GND V CC (FPT-8P-M01) ...
Page 3
BLOCK DIAGRAM : = 1.24 V Reference Voltage Generator : = 100 kΩ COMP kΩ Inhibit 1.24 V 1.2 µ COMP.O 10 ...
Page 4
MB3773 FUNCTIONAL DESCRIPTIONS Comp.S is comparator including hysteresis. it compare the reference voltage and the voltage of Vs, so that when the voltage of Vs terminal falls below approximately 1.23 V, reset signal outputs. Instantaneous breaks or drops in the ...
Page 5
MB3773 Basic Operation RESET T RESET CK GND 0 RESET (1) (2) Logic Circuit T (ms 1000 · C ...
Page 6
MB3773 OPERATION SEQUENCE (1) When Vcc rises to about 0.8 V, RESET goes “Low” and RESET goes “High”. The pull-up current of approximately 1 µA (Vcc = 0 output from RESET. (2) When Vcc rises ...
Page 7
ABSOLUTE MAXIMUM RATINGS Parameter Supply voltage Input voltage RESET, RESET Supply voltage Power dissipation (Ta ≤ +85 °C) Storage temperature WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ...
Page 8
MB3773 ELECTORICAL CHARACTERISTICS (1) DC Characteristics Parameter Supply current Detection voltage Hysteresis width Reference voltage Reference voltage change rate Reference voltage output loading change rate CK threshold voltage CK input current C discharge current T High level output voltage Output ...
Page 9
Characteristics Parameter V input pulse width CC CK input pulse width CK input frequency Watch-dog timer watching time Watch-dog timer reset time Rising reset hold time Output propagation delay time from V CC Output rising time* Output falling time* ...
Page 10
MB3773 TYPICAL CHARACTERISTIC CURVES Supply current vs. Supply voltage 0. 0.65 0. 0.25 0.15 0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Supply ...
Page 11
High level output voltage vs. High level output current (RESET 5 4 High level output current I (µA) OH2 Reference voltage vs. Supply voltage 1.246 Ta 1.244 Ta 1.242 ...
Page 12
MB3773 (Continued) Reset time vs. Operating ambient temperature (At watch-dog timer +20 +40 +60 Operating ambient temperature Ta ( °C) Watch-dog timer watching time vs. C terminal capacitance ...
Page 13
APPLICATION CIRCUIT EXAMPLE 1: Monitoring 5V Supply Voltage and Watch-dog Timer VCC (5V Notes : • Supply voltage is monitored using V • Detection voltage are V EXAMPLE 2: 5V Supply Voltage Monitoring (external fine-tuning type) V (5V) ...
Page 14
MB3773 EXAMPLE 3: With Forced Reset (with reset hold) ( Note : Grounding pin 7 at the time sets RESET (pin 8) to Low and RESET (pin 2) to High. ( ...
Page 15
EXAMPLE 4: Monitoring Two Supply Voltages (with hysteresis, reset output and NMI) V (12 V) CC2 CC1 MB3773 1.2 kΩ 5.1 kΩ Example ...
Page 16
MB3773 EXAMPLE 5: Monitoring Two Supply Voltages (with hysteresis and reset output) V (12 V) CC2 Example : Comp. 1, Comp MB4204, MB47393 Notes : • When ...
Page 17
EXAMPLE 6: Monitoring Low voltage and Overvoltage Monitoring (with hysteresis MB3773 1.2 kΩ 5.6 kΩ R Notes : • Comp. 1 and Comp. 2 are used to monitor for overvoltage ...
Page 18
MB3773 EXAMPLE 7: Monitoring Supply Voltage Using Delayed Trigger Note : Adding voltage such as shown in the figure to V width by 50 µ MB3773 ...
Page 19
EXAMPLE 8: Stopping Watch-dog Timer (Monitoring only supply voltage) These are example application circuits in which the MB3773 monitors supply voltage alone without resetting the microprocessor even if the latter, used in standby mode, stops sending the clock pulse to ...
Page 20
MB3773 (Continued) (c) Using NPN transistor (d) Using PNP transistor MB3773 MΩ kΩ 2 ...
Page 21
EXAMPLE 9: Reducing Reset Hold Time ( = MB3773 (a) T reduction method PR Notes : • RESET is the only output that can be used. ...
Page 22
MB3773 EXAMPLE 10: Circuit for Monitoring Multiple Microprocessor FF1 RESET RESET RESET RESET CK CK GND GND *: Microprocessor Notes : • connects from FF1 and FF2 outputs ...
Page 23
Description of Application Circuits Using one MB3773, this application circuit monitors multiple microprocessor in one system. Signals from each microprocessor are sent to FF1, FF2 and FF3 clock inputs. Figure 2 shows these timings. Each flip-flop operates using signals sent ...
Page 24
MB3773 EXAMPLE 11: Circuit for Limiting Upper Clock Input Frequency Notes : • This is an example application to limit upper frequency f the microprocessor. If the CK cycle sent from the microprocessor exceeds ...
Page 25
... ORDERING INFORMATION Part number MB3773PF- MB3773PF- E1 RoHS Compliance Information of Lead (Pb) Free version The LSI products of Fujitsu Microelectronics with “E1” are compliant with RoHS Directive , and has observed the standard of lead, cadmium, mercury, Hexavalent chromium, polybrominated biphenyls (PBB) , and polybro- minated diphenyl ethers (PBDE) . The product that conforms to this standard is added “ ...
Page 26
MB3773 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 26 lead-free mark JEITA logo JEDEC logo G Pb 1000 QC ...
Page 27
... MB3773PF- E1 RECOMMENDED CONDITIONS OF MOISTURE SENSITIVITY LEVEL Item Mounting Method Mounting times Storage period When the storage period after 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 ° ...
Page 28
MB3773 PACKAGE DIMENSION 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 ...
Page 29
MEMO MB3773 29 ...
Page 30
MB3773 MEMO 30 ...
Page 31
MEMO MB3773 31 ...
Page 32
FUJITSU MICROELECTRONICS LIMITED Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ For further information please contact: North and South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 E. Arques Avenue, M/S 333 Sunnyvale, CA ...