ca3277 Intersil Corporation, ca3277 Datasheet
ca3277
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ca3277 Summary of contents
Page 1
... Dual 5V Regulator with Serial Data Buffer Interface for Microcontroller Applications Description The CA3277 is a Dual 5V Voltage Regulator IC intended for micro- processor and logic controller applications supplied with fea- tures that are commonly specified for sequentially controlled shutdown and startup requirements of microcontrollers. Over-volt- ...
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... I COUT(MAX) RESET Reset, (RST) Threshold Reset Delay Time (Note 6) RESET Out High V OH(RST) RESET Low V RESET Output Sink Current Specifications CA3277 Thermal Information 26V Thermal Resistance (~20.5V) Plastic DIP Package . . . . . . . . . . . . . . . . BATT(SD) (Temp. meas. on center lead next to case) Power Dissipation, P BATT +60 C (Free Air) ...
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... CRST pin may be discharged repetitively with a transistor switch. The RESET pin switches from low to high when the CRST pin is charged to approximately 3V. Normal ATE testing measures the source charging current. which is typically 10 A. For any other value of Capacitor the charge time, t for reset is determined as follows: t (i. 0. 141ms) Specifications CA3277 + ...
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... NOTE: DATA IN and CUR OUT are remote/host Serial Data Communication Buffers. Typical Remote Source Impedance for DATA Typical Remote Load for CUR OUT is 250 FIGURE 1. TYPICAL APPLICATION CIRCUIT OF THE CA3277 DUAL 5V REGULATOR WITH MICROCONTROLLER AND SERIAL DATA BUFFER INTERFACE TO A REMOTE HOST ...
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... This correlates to approxi- mately A of charging current sourced from the CRST terminal to charge C Regulation - The regulated output stages of the CA3277 have similar circuits, each having an error amplifier to compare the output voltage to the bandgap reference voltage. The circuit of the 5V/Switched regulator is shown in Figure 3 ...
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... OUT1 terminal is typically 148K . Under conditions of reverse battery or negative supply voltages on the BATT input, current in the IC is primarily reverse junction leakage. The design of the CA3277 is configured to prevent high current if the power supply is reversed. Exceptions to this are preventable. One example is ...
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... BATT TO 11V, ENABLE TO GND 0.4 0 0.2 0 IGN IN INPUT VOLTAGE (V) FIGURE 4C. TYPICAL IGN IN CURRENT vs IGN IN INPUT VOLTAGE CA3277 ENABLE OUT1 (OUT2) RST CA3277 CRST GND PINS 4,5,12,13 15 OUT2 11 6 DATA IGN GND OUT OUT V V IGN OUT DATA OUT ...
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... For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 727-9207 FAX: (407) 724-7240 CA3277 T A IGN IN TO BATT, V 1.00 DATA IN THROUGH 250 TO BATT ...