M51955A,B/M51956A,B Voltage Detecting, System Resetting IC Series REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Description M51955A,B/M51956A,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 include a built-in delay circuit to provide a retardation time (200 µs Typ). 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 M51955AL/BL M51956AL/BL M51955AFP/BFP M51956BFP 5 Output NC 1 4 NC M51956AFP 8 NC 7 Power-supply Input 2 NC 1 8 NC Input 2 7 Power-supply 3 GND NC 3 6 Output NC 3 6 Output 2 Input 1 Power-supply (Top view) Outline: 5P5T GND 4 5 NC (Top view) NC: No Connection Outline: PRSP0008DE-C (recommend) PRSP0008DA-A (8P2S-A) (not recommend for new design) REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 1 of 11 GND 4 5 NC (Top view) NC: No Connection Outline: PRSP0008DA-A (8P2S-A) M51955A,B/M51956A,B Block Diagram M51955A, B Powersupply M51956A, B 25µA Typ Output – Input Powersupply A: Built-in Load B: Open Collector – + 25µA Typ Output – Input + C Delay capacitor 1.25V A: Built-in Load B: Open Collector 1.25V GND + C Delay capacitor GND Operating Waveform 1.25V t H td td L td ≈ 200µs REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 2 of 11 Input voltage ∗ M51956A, B Output state Output state Input voltage ∗ M51955A, B t 1.25V t H td td L td ≈ 200µs t M51955A,B/M51956A,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 4.5 4.4 8-pin SOP (PRSP0008DE-C): recommend 8-pin SOP (PRSP0008DA-A): not recommend 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 M51955A, M51955B • “H” reset type M51956A, M51956B 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 VCC = 5V Input current IIN — 100 500 nA VIN = 1.25V Circuit current ICC — 390 590 µA Type A, VCC = 5V — 360 540 Delay time tpd 80 200 500 µs Output saturation voltage Vsat — 0.2 0.4 V — 0.2 0.4 Threshold operating voltage VOPL — 0.67 0.8 — 0.55 0.7 Output leakage current IOH — — 1 µA Type B Output load current IOC –40 –25 –17 µA Type A, VCC = 5V, VO = 1/2 × VCC Output high voltage VOH VCC–0.2 VCC–0.06 — V Type A REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 3 of 11 Type B, VCC = 5V L reset type, VCC = 5V, VIN < 1.2V, Isink = 4mA H reset type, VCC = 5V, VIN > 1.35V, Isink = 4mA V L reset type minimum supply voltage for IC operation RL = 2.2kΩ, Vsat ≤ 0.4V RL = 100kΩ, Vsat ≤ 0.4V M51955A,B/M51956A,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 Detection 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 16 250 VCC = 5V 200 10V 150 VCC = 15V 100 50 60 80 100 Ambient Temperature Ta (°C) REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 4 of 11 VIN = 1.25V Ta = –30°C 100 Ta = 25°C 50 Ta = 85°C 4 8 12 16 20 Threshold Operating Voltage ([L] reset type) 1.0 Output Voltage VOUT (V) Delay Time tpd (µs) 250 40 80 100 Supply Voltage VCC (V) 300 20 60 150 0 0 20 Delay Time vs. Ambient Temperature (M5195xx, Built-in capacitor type) 350 0 40 200 Supply Voltage VCC (V) 0 –40 –20 20 Input Current vs. Supply Voltage (Input voltage detection series) Input Current IIN (nA) Detection 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 Ta = 25°C 0.8 0.6 RL = 2.2kΩ 0.4 RL = 22kΩ RL = 100kΩ 0.2 0 0 0.2 0.4 0.6 0.8 Supply Voltage VCC (V) 1.0 M51955A,B/M51956A,B Output Load Current vs. Output Voltage (M5195xA) Supply voltage detecting "L" reset type : VCC = 4V Except above mentioned : VCC = 5V 0.2 0.1 0 0 1 2 3 4 5 6 Output Sink Current Isink (mA) Circuit Current vs. Supply Voltage (M51955B, M51956B) Circuit Current ICC (µA) Output Load Current ICC (µA) Output Saturation Voltage Vsat (V) Output Saturation Voltage vs. Output Sink Current 0.3 800 600 Ta = –30°C 400 Ta = 25°C Ta = 85°C 200 0 0 4 8 12 16 Supply Voltage VCC (V) REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 5 of 11 –40 –30 –20 VCC = 5V VCC = 10V VCC = 15V –10 0 0 4 8 12 Output Voltage VO (V) 16 M51955A,B/M51956A,B Example of Application Circuit Reset Circuit of M5195xx Series Powersupply R1 Input R2 M51955x M51956x GND RL Output Powersupply VCC RESET (RESET) Logic circuit GND Figure 1 Reset Circuit of M5195xx Series Notes: 1. When the detecting supply voltage is 4.25 V, M51951, M51952, M51953 and M51954 are used. In this case, R1 and R2 are not necessary. When the voltage is anything except 4.25 V, M51955, M51956, M51957 and M51958 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. When the delay time is short, M51951, M51952, M51955 and M51956 are available. These ICs have a delay capacity and the delay time is about 200 µs. If a longer delay time is necessary, M51953, M51954, M51957 and M51958 are used. In this case, the delay time is about 0.34 × Cd (pF) µs. 3. If the M5195xx 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. 4. 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. 5. When the reset terminal in the logic circuit is of the low reset type, M51951, M51953, M51955 and M51957 are used and when the terminal is of the high reset type, M51952, M51954, M51956 and M51958 are used. 6. When a negative supply voltage is used, the supply voltage side of M5195xx and the GND side are connected to negative supply voltage respectively. REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 6 of 11 M51955A,B/M51956A,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 M51955 M51956 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 M51955 M51956 GND Figure 3 Recommended Example REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 7 of 11 M51955A,B/M51956A,B VCC1 Independent VCC2 VCC Independent Power-supply Input Vin M51955 M51956 Output Input Vin Power-supply M51955 M51956 Output VCC GND GND GND Example 2. Logic pulse input (not recommended) Example 1. Independent power supply system Please do enough verifying about transition characteristic of VCC1 and VCC2. 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 M51955 M51956 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. REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 8 of 11 M51955A,B/M51956A,B Setting of Output Load Resistance (M51955B/M51956B) 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. REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 9 of 11 M51955A,B/M51956A,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 REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 10 of 11 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 M51955A,B/M51956A,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 REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 11 of 11 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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