Specification. Ultra-Small Package High-Precision Voltage Detectors. Description. Features. Ordering Information. Applications.

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1 Description The U61Cxx series is a series of high-precision voltage detectors developed using CMOS process. The detection voltage is fixed internally with an accuracy of ±2.0%. Two output forms, Nch open-drain and CMOS output, are available. Ultra-low current consumption and miniature package lineup can meet demand from the portable device applications. Features Ultra-low current consumption 0.8μA typ. (Vin=1.5V) High-precision detection voltage ±2.0 % Operating voltage range 0.7 V to 8 V Detection voltage 1.5 V to 6.0V (0.1V step) Output form Nch open-drain output (Active Low) or CMOS output (Active Low) Package :SOT-23-3L;SOT-343;SOT-89; TO-92 Ordering Information Applications U 61C X 1 XX 2 X 3 X 4 Package Type Output Delay 0=No delay Detect Voltage Battery checkers Power fai lure detectors Power monitor for portable equipments such as pagers, calculators, electronic notebooks and remote controllers. Constant voltage power monitor for cameras, video equipments and communication devices. Power monitor for microcomputers and reset for CPUs. Toys Output Configuration Series UNI Products Product Cod Product Code Description Symbol Description C CMOS X 1 Output Configuration N N-ch open drain XX 2 Output Voltage =2.5V 38=3.8V. X 3 Output Delay 0 No Delay M SOT-23-3L P SOT-89 X 4 Package Type N SOT-343 T TO-92 ( Standard) L TO-92 (Custom pin configuration) Pin Configuration 1

2 Pin Assignment Pin Number SOT-23-3L SOT-89 TO-92 (T) TO-92 (L) SOT-343 Symbol Pin Functions Vin Voltage Input Pin Vss GND Pin Vout NC Output Pin No connection Typical Application Circuit 2

3 Block Diagram (1) CMOS Output Products (2)Nch Open-drain Output Products Absolute Maximum Ratings (TA = 25 C, unless otherwise specified) Parameter Symbol Rating Unit Input Voltage VIN 8.0 V Output Current IOUT 50 ma Output Voltage CMOS VSS -0.3 ~ VOUT +0.3 VOUT N-ch open drain VSS -0.3 ~ 8 V SOT-23-3L 150 Power Dissipation SOT PD SOT mw TO Operating Temperature TOPR -40 ~ +85 Storage Temperature TSTG -40 ~ +125 Soldering Temperature and Time TSOLDER 260, 10s Electrical Characteristics (VDF(T) = 1.6V to 6.0V±2%, TA = 25 C, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit Circuit Detect Voltage VDF VDF x 0.98 VDF VDF x 1.02 V 1 Release voltage VHYS VDF x 0.02 VDF x 0.05 VDF x 0.08 V 1 Supply Current Operating Voltage ISS VIN VIN = 1.5V VIN = 2.0V VIN = 3.0V VIN = 4.0V μa 2 VIN = 5.0V VDF(T) = 1.6V to V 1 6.0v 3

4 Output Current Temperature Characteristics IOUT VDF / ( top r x VDF) (N-ch VDS = 0.5V) VIN = 1.0V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V P-Ch VDS = 2.1V VIN = 8.0V (with CMOS output) -40 C VTOP1 85 C ±100 ma ppm/ C 3 4 Test Circuit Timing Chart 4

5 Operation 1-1.When the power supply voltage (VDD) is higher than the release voltage (VDF), the Nch transistor is OFF and the Pch transistor is ON to provide VDD (high) at the output. 1-2.When the power supply voltage (VDD) is lower than the release voltage (VDF), the Nch transistor is ON and the Pch transistor is OFF to provide VSS (low) at the output. 1-3.When the VDD falls below the minimum operating voltage, the output becomes undefined, or goes to the VDD when the output is pulled up to the VDD The VSS level appears when the VDD is VSS level The VSS level appears when the VDD rises above the minimum operating voltage. The VSS level still appears even when the VDD surpasses VDF, as long as it does not exceed the release voltage + VDF. 1-6.When the VDD rises above + VDF the Nch transistor becomes OFF and the Pch transistor becomes ON to provide VDD level at the output. 5

6 Application Circuit Examples Microcomputer Reset Circuits The same supply voltage with CPU The same supply voltage with CPU The different supply voltage with CPU (CMOS output) (Nch open drain output) (Nch open drain output) Power-on Reset Circuit Nch open drain output Nch open drain output Memory back-up circuit 6

7 Power failure detectors Power-on Reset Circuit Power-on Reset Circuit Power-on Reset Circuit 7

8 Package Dimensions SOT-23-3L 8

9 Package Dimensions (continued) SOT-89 9

10 Package Dimensions (continued) TO-92 10

11 Package Dimensions (continued) SOT