M51945A,B/M51946A,B Voltage Detecting, System Resetting IC Series REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Description M51945A,B/M51946A,B are semiconductor integrated circuits for resetting of all types of logic circuits such as CPUs, and has the feature of setting the detection voltage by adding external resistance. They fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping circuit. Features • Few external parts • Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage): 0.6 V (Typ) at RL = 22 kΩ • Wide supply voltage range: 2 V to 17 V • Wide application range Application • Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and MCU, Reset of logic circuit, Battery check circuit, switching circuit back-up voltage, level detecting circuit, waveform shaping circuit, delay waveform generating circuit, DC/DC converter, over voltage protection circuit Recommended Operating Condition • Supply voltage range: 2 V to 17 V Pin Arrangement M51945AL/BL M51946AL/BL 5 Output 4 NC M51945AFP/BFP M51946AFP/BFP NC 1 8 NC 7 Power-supply Input 2 3 GND NC 3 6 Output 2 Input 1 Power-supply GND 4 (Top view) (Top view) Outline: 5P5T 5 NC NC: No Connection Outline: PRSP0008DE-C (recommend) PRSP0008DA-A (8P2S-A) (not recommend for new design) REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 1 of 10 M51945A,B/M51946A,B Block Diagram M51945A, B Powersupply M51946A, B 25µA Typ Input Powersupply A: Built-in Load B: Open Collector – Output A: Built-in Load B: Open Collector 25µA Typ + Input + Output – 1.25V 1.25V GND GND Operating Waveform M51946A, B Input voltage ∗ Input voltage ∗ M51945A, B 1.25V 1.25V H L t REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 2 of 10 t Output state Output state t H L t M51945A,B/M51946A,B Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted) Item Supply voltage Symbol VCC Output sink current Output voltage Power dissipation Ratings 18 Unit V Conditions Isink VO 6 VCC mA V Type A (output with constant current load) Pd 18 450 mW Type B (open collector output) 5-pin SIP 400 300 Thermal derating Kθ 8-pin SOP (PRSP0008DE-C): recommend 8-pin SOP (PRSP0008DA-A): not recommend 4.5 4.4 mW/°C Refer to the thermal derating curve. 3 5-pin SIP 8-pin SOP (PRSP0008DE-C) : recommend 8-pin SOP (PRSP0008DA-A) : not recommend Operating temperature Topr –30 to +85 °C Storage temperature Input voltage range Tstg VIN –40 to +125 –0.3 to VCC °C V VCC ≤ 7 V VCC > 7 V –0.3 to +7 Electrical Characteristics (Ta = 25°C, unless otherwise noted) • “L” reset type M51945A, M51945B • “H” reset type M51946A, M51946B Symbol Min Typ Max Unit Detecting voltage Item VS 1.20 1.25 1.30 V Hysteresis voltage ∆VS 9 15 23 mV Detecting voltage temperature coefficient VS/∆T — 0.01 — %/°C Supply voltage range VCC 2 — 17 V Test Conditions Input current IIN — 100 500 nA VIN = 1.25V Circuit current ICC — 310 470 µA Type A, VCC = 5V — 280 420 Output saturation voltage Vsat — 0.2 0.4 V L reset type, VCC = 5V, VIN < 1.2V, Isink = 4mA — 0.2 0.4 Threshold operating voltage VOPL Output leakage current IOH Output load current IOC Output high voltage VOH tPHL tPLH Propagation delay time Type B, VCC = 5V H reset type, VCC = 5V, VIN > 1.35V, Isink = 4mA 0.67 0.8 0.55 0.7 — — 1 µA Type B –40 –25 –17 µA Type A, VCC = 5V, VO = 1/2 × VCC VCC–0.2 VCC–0.06 — V Type A — 4 — µs Response time when VCC changes H → L — 2 — REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 3 of 10 V L reset type minimum supply voltage for IC operation RL = 2.2kΩ, Vsat ≤ 0.4V — — RL = 100kΩ, Vsat ≤ 0.4V Response time when VCC changes L → H M51945A,B/M51946A,B Typical Characteristics Thermal Derating (Maximum Rating) Detection Voltage vs. Ambient Temperature (Input voltage detection series) 1.28 5-pin SIP 8-pin SOP (PRSP0008DE-C) : recommend 8-pin SOP (PRSP0008DA-A) : not recommend 400 300 200 100 0 0 25 50 75 85 100 Detecting Voltage VS (V) Power Dissipation Pd (mW) 500 1.27 VSH 1.26 1.24 1.23 1.22 –40 –20 125 Ambient Temperature Ta (°C) VSH 1.25 VSL 1.24 1.23 4 8 12 250 16 RL = 2.2kΩ RL = 22kΩ RL = 100kΩ 0.4 0.6 0.8 Supply Voltage VCC (V) REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 4 of 10 1.0 Output Saturation Voltage Vsat (V) Output Voltage VOUT (V) 0.6 0.2 VIN = 1.25V Ta = –30°C 100 Ta = 25°C 50 Ta = 85°C 4 8 12 16 20 Output Saturation Voltage vs. Output Sink Current 0.3 0.8 0 0 80 100 Supply Voltage VCC (V) Ta = 25°C 0.2 60 150 0 0 20 Threshold Operating Voltage ([L] reset type) 0.4 40 200 Supply Voltage VCC (V) 1.0 20 Input Current vs. Supply Voltage (Input voltage detection series) Input Current IIN (nA) Detecting Voltage VS (V) 1.27 1.22 0 0 Ambient Temperature Ta (°C) Detection Voltage vs. Supply Voltage (Input voltage detection series) 1.28 1.26 VSL 1.25 Supply voltage detecting "L" reset type : VCC = 4V Except above mentioned : VCC = 5V 0.2 0.1 0 0 1 2 3 4 5 Output Sink Current Isink (mA) 6 M51945A,B/M51946A,B Circuit Current ICC (µA) Circuit Current vs. Supply Voltage (M51945B, M51946B) 800 600 Ta = –30°C 400 Ta = 25°C 200 0 0 Ta = 85°C 4 8 12 16 Supply Voltage VCC (V) Example of Application Circuit Reset Circuit of M5194xx Series Powersupply R1 RL Output Input GND VCC RESET (RESET) Logic circuit M5194xx R2 Powersupply Cd GND Figure 1 Reset Circuit of M5194xx Series Notes: 1. When the detecting supply voltage is 4.25 V, M51943 and M51944 are used and R1 and R2 are not necessary. When the voltage is anything except 4.25 V, M51945 and M51946 are used. In this case, the detecting supply voltage is 1.25 × (R1 +R2)/R2 (V) approximately. The detecting supply voltage can be set between 2 V and 15 V. 2. If the M5194xx and the logic circuit share a common power source, type A (built-in load type) can be used whether a pull-up resistor is included in the logic circuit or not. 3. The logic circuit preferably should not have a pull-down resistor, but if one is present, add load resistor RL to overcome the pull-down resistor. 4. It is better to use the M5195xx series to cause a delay, but if the delay is caused by the M5194xx series, the delay capacitor Cd is applied between the output and GND. 5. When the reset terminal in the logic circuit is of the low reset type, M51943 and M51945 are used and when the terminal is of the high reset type, M51944 and M51946 are used. 6. When a delay is necessary at both rise time and fall time, M51945 and M51946 are used and the series resistors (R11, R12) are applied between the output and GND or instead of R1, and these connect the capacitor between the connection point and GND. The connection point of the capacitor is fixed according to the ratio of delay at fall/rise time. 7. When a negative supply voltage is used, the supply voltage side of M5194xx and the GND side are connected to GND and the negative supply voltage respectively. REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 5 of 10 M51945A,B/M51946A,B Notice for use About the Power Supply Line 1. About bypass capacitor Because the ripple and the spike of the high frequency noise and the low frequency are superimposed to the power supply line, it is necessary to remove these. Therefore, please install C1 and C2 for the low frequency and for the high frequency between the power supply line and the GND line as shown in following figure 2. VCC + C1 C2 Power-supply R1 Example of ripple noise measures Input Vin R2 M51945 M51946 Output GND Figure 2 Example of Ripple Noise Measures 2. The sequence of voltage impression Please do not impress the voltages to the input terminals earlier than the power supply terminal. Moreover, please do not open the power supply terminal with the voltage impressed to the input terminal. (The setting of the bias of an internal circuit collapses, and a parasitic element might operate.) About the Input Terminal 1. Setting range of input voltage The following voltage is recommended to be input to the input terminal (pin 2). about 0.8 (V) < Vin < VCC – 0.3 (V) .... at VCC ≤ 7 V about 0.8 (V) < Vin < 6.7 (V) .............. at VCC > 7 V 2. About using input terminal Please do an enough verification to the transition characteristic etc. of the power supply when using independent power supply to input terminal (pin 2). VCC Vin is decided to the VCC subordinating, and operates in the range about 0.8 (V) < Vin < VCC – 0.3 (V). Output Power-supply Input Vin M51945 M51946 GND Figure 3 Recommended Example REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 6 of 10 M51945A,B/M51946A,B VCC1 Independent VCC2 VCC Independent Power-supply Input Vin M51945 M51946 Output Input Vin Power-supply M51945 M51946 Output VCC GND GND Example 1. Independent power supply system Please do enough verifying about transition characteristic of VCC1 and VCC2. GND Example 2. Logic pulse input (not recommended) Figure 4 3. Calculation of detecting voltage Detecting voltage Vs can be calculated by the following expression. However, the error margin is caused in the detecting voltage because input current Iin (standard 100 nA) exists if it sets too big resistance. Please set the constant to disregard this error margin. R1 + R 2 VS = 1.25 × + Iin × R1 R2 error margin VCC Power-supply R1 Vin R2 Iin → Input M51945 M51946 Output GND Figure 5 Influence of Input Current 4. About the voltage input outside ratings Please do not input the voltage outside ratings to the input terminal. An internal protection diode becomes order bias, and a large current flows. REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 7 of 10 M51945A,B/M51946A,B Setting of Output Load Resistance (M51945B/M51946B) High level output voltage can be set without depending on the power-supply voltage because the output terminal is an open collector type. However, please guard the following notes. 1. Please set it in value (2 V to 17 V) within the range of the power-supply voltage recommendation. Moreover, please never impress the voltage of maximum ratings 18 V or more even momentarily either. 2. Please set output load resistance (pull-up resistance) RL so that the output current (output inflow current IL) at L level may become 4 mA or less. Moreover, please never exceed absolute maximum rating (6 mA). VCC (2V to 17V) RL 6 IL ≤ 4mA Figure 6 Output Load Resistance RL Others 1. Notes when IC is handled are published in our reliability handbook, and please refer it. The reliability handbook can be downloaded from our homepage (following URL). http://www.renesas.com/fmwk.jsp?cnt=reliability_root.jsp&fp=/products/common_info/reliability 2. Additionally, please inquire of our company when there is an uncertain point on use. REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 8 of 10 M51945A,B/M51946A,B Package Dimensions 5P5T Plastic 5pin 240mil SIP EIAJ Package Code SIP5-P-240-2.54 Weight(g) 0.22 JEDEC Code – Lead Material Cu Alloy D L A1 A A2 E Symbol 1 5 b e E1 b2 A A1 A2 b b1 b2 c D E E1 e L c b1 SEATING PLANE JEITA Package Code P-SOP8-4.4x4.85-1.27 RENESAS Code PRSP0008DE-C *1 Previous Code — MASS[Typ.] 0.1g F D 8 Dimension in Millimeters Min Nom Max – – 6.1 – – 1.4 – – 4.0 0.4 0.5 0.6 1.1 1.2 1.5 0.75 0.85 1.15 0.22 0.27 0.34 11.7 11.9 11.5 1.77 1.97 2.17 0.6 0.7 0.8 – – 2.54 – – 3.0 NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. 5 c *2 E HE bp Index mark Terminal cross section ( Ni/Pd/Au plating ) Z Reference Symbol 4 1 e *3 bp x M A A2 L1 A1 θ L y Detail F REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 9 of 10 D E A2 A1 A bp b1 c c1 θ HE e x y Z L L1 Dimension in Millimeters Min Nom Max 4.65 4.85 5.05 4.2 4.4 4.6 1.85 0.00 0.1 0.20 2.03 0.34 0.4 0.46 0.15 0.20 0.25 0° 8° 5.7 6.2 6.5 1.12 1.27 1.42 0.12 0.10 0.75 0.25 0.45 0.65 0.90 M51945A,B/M51946A,B JEITA Package Code P-SOP8-4.4x5-1.27 RENESAS Code PRSP0008DA-A MASS[Typ.] 0.07g E 5 *1 HE 8 Previous Code 8P2S-A F 1 NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. 4 Index mark c A2 *2 A1 D L A Reference Symbol *3 e bp y D E A2 A1 A bp c Detail F HE e y L REJ03D0774-0200 Rev.2.00 Aug 20, 2007 Page 10 of 10 Dimension in Millimeters Min Nom Max 4.8 5.0 5.2 4.2 4.4 4.6 1.5 0.05 1.9 0.35 0.4 0.5 0.13 0.15 0.2 0° 10° 5.9 6.2 6.5 1.12 1.27 1.42 0.1 0.2 0.4 0.6 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Notes: 1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of Renesas or any third party with respect to the information in this document. 2. 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