Preliminary Datasheet RNA51953A, B Voltage Detecting, System Resetting IC Series REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Description RNA51953A,B are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as CPUs. They include a built-in delay circuit to provide the desired retardation time simply by adding an external capacitor. They fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping circuit. Features Few external parts Large delay time with a capacitor of small capacitance (td 100 ms, at 0.33 F) Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage): 0.6 V (Typ) at RL = 22 k Wide supply voltage range: 2 V to 17 V Wide application range Ordering Information Part Name RNA51953AFPH0 Taping Abbreviation (Quantity) Package Type Package Code Package Abbreviation Surface Treatment SOP-8 pin PRSP0008DE-C FP H (2,500 pcs / Reel) 0 (Ni/Pd/Au) 0 (Ni/Pd/Au) RNA51953APT0 DIP-8 pin PRDP0008AF-B P T (1,000 pcs / Reel) RNA51953BFPH0 SOP-8 pin PRSP0008DE-C FP H (2,500 pcs / Reel) 0 (Ni/Pd/Au) RNA51953BPT0 DIP-8 pin PRDP0008AF-B P T (1,000 pcs / Reel) 0 (Ni/Pd/Au) 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 REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 1 of 10 RNA51953A, B Preliminary Outline and Article Indication • RNA51953A, B Part No. R953A YMWC CCC R953B YMWC CCC SOP-8 Lot No. Y: Year Code (the last digit of year) M: Month Code W: Week Code C: Control Code Trace Code Pin No.1 Part No. R5 1 9 5 3A R5 1 9 5 3B Y MW Y MW DIP-8 W: Week Code M: Month Code Y: Year Code Pin Arrangement RNA51953A, B NC 1 8 NC NC 2 7 Power-supply NC 3 6 Output 5 Delay capacitor GND 4 (Top view) NC: No Connection Outline: PRSP0008DE-C (SOP-8) PRDP0008AF-B (DIP-8) REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 2 of 10 RNA51953A, B Preliminary Block Diagram RNA51953A, B Powersupply A: Built-in Load B: Open Collector 5 μA Typ R1 25 μA Typ Output – – + R2 1.25 V GND Delay capacitor Operating Waveform Output state Supply voltage RNA51953A, B 4.25 V 0.65 V t H td L Output undefined REJ03D0911-0402 Rev.4.02 Apr 01, 2010 td td ≈ 0.34 × Cd(pF) μs t Page 3 of 10 RNA51953A, B Preliminary Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted) Item Supply voltage Output sink current Symbol VCC Isink Output voltage VO Power dissipation Pd Thermal derating K Operating temperature Storage temperature Topr Tstg Ratings 18 6 VCC 18 400 570 4.4 8.3 –40 to +85 –55 to +125 Unit V mA V mW mW/°C Conditions Type A (output with constant current load) Type B (open collector output) 8-pin SOP (PRSP0008DE-C) 8-pin DIP (PRDP0008AF-B) 8-pin SOP (PRSP0008DE-C) Refer to the thermal derating curve. 8-pin DIP (PRDP0008AF-B) °C °C Electrical Characteristics (Ta = 25°C, unless otherwise noted) “L” reset type Item Symbol Min Typ Max Unit Detecting voltage VS 4.05 4.25 4.45 V Hysteresis voltage VS 30 50 80 mV Detecting voltage temperature coefficient VS/T — 0.01 — %/°C Circuit current ICC Delay time Test Conditions Type A, VCC = 5V — 450 680 — 420 630 tpd 1.6 3.4 7.0 ms Cd = 0.01F * Constant current Ipd –8 –5 –3 A VCC = 5V Output saturation voltage Vsat — 0.2 0.4 V VCC = 4V, Isink = 4mA Threshold operating voltage VOPL Output leakage current IOH A Type B, VCC = 5V RL = 2.2k, Vsat 0.4V — 0.67 0.8 — 0.55 0.7 — — 30 nA Type B V RL = 100k, Vsat 0.4V Output load current IOC –40 –25 –17 A Type A, VCC = 5V, VO = 1/2 VCC Output high voltage VOH VCC–0.2 VCC–0.06 — V Type A Note: Please set the desired delay time by attaching capacitor of the range between 4700 pF and 10 F. REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 4 of 10 RNA51953A, B Preliminary Typical Characteristics Thermal Derating Detection Voltage vs. Ambient Temperature 4.34 8-pin DIP (PRDP0008AF-B) 400 300 8-pin SOP (PRSP0008DE-C) 200 100 0 0 Delay Capacitance Cd (μF) Detection Voltage VS (V) 500 25 50 75 85 100 4.32 4.30 4.28 4.26 VSL 4.24 0 20 40 60 80 100 Ambient Temperature Ta (°C) Ambient Temperature Ta (°C) Delay Capacitance vs. Delay Time Delay Time vs. Ambient Temperature 6 10 7 V CC = 5 V 5 3 CD = 0.01 μF 1 7 5 3 0.1 7 5 3 0.01 7 5 3 0.001 0.1 3 57 1 5 4 VCC = 5 V 3 1 0 –40 –20 3 5 7 10 3 5 7 100 3 5 7 1000 –8 –6 –4 –2 0 20 40 60 80 100 Ambient Temperature Ta (°C) REJ03D0911-0402 Rev.4.02 Apr 01, 2010 20 40 60 80 100 Threshold Operating Voltage 1.0 Output Voltage VOUT (V) VCC = 5 V VCC = 15 V 0 –40 –20 0 Ambient Temperature Ta (°C) Canstant Current at Cd pin vs. Ambient Temperature –12 –10 10 V VCC = 15 V 2 Delay Time tpd (ms) Canstant Current at Cd pin Ipd (μA) VSH 4.22 –40 –20 125 Delay Time tpd (ms) Power Dissipation Pd (mW) 600 Ta = 25°C 0.8 0.6 RL = 2.2 kΩ 0.4 RL = 22 kΩ RL = 100 kΩ 0.2 0 0 0.2 0.4 0.6 0.8 1.0 Supply Voltage VCC (V) Page 5 of 10 RNA51953A, B Preliminary Output Load Current vs. Output Voltage (RNA51953A) 0.3 Output Load Current ICC (μA) Output Saturation Voltage Vsat (V) Output Saturation Voltage vs. Output Sink Current VCC = 4 V 0.2 0.1 0 0 1 2 3 4 5 6 Output Sink Current Isink (mA) –40 –30 –20 VCC = 5 V VCC = 10 V VCC = 15 V –10 0 0 4 8 12 16 Output Voltage VO (V) Circuit Current ICC (μA) Circuit Current vs. Ambient Temperature (RNA51953B) 700 600 500 VCC = 5 V 400 300 200 100 0 –40 –20 0 20 40 60 80 100 Ambient Temperature Ta (°C) REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 6 of 10 RNA51953A, B Preliminary Example of Application Circuit Reset Circuit of RNA51953 Powersupply Powersupply RL Output RESET Logic circuit RNA51953x GND VCC Delay capacitor GND Cd Figure 1 Reset Circuit of RNA51953 Notes: 1. When the voltage is anything except 4.25 V, RNA51957 and RNA51958 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. The delay time is about 0.34 Cd (pF) s. 3. If the RNA51953 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, RNA51953 and RNA51957 are used and when the terminal is of the high reset type, RNA51958 are used. 6. When a negative supply voltage is used, the supply voltage side of RNA51953 and the GND side are connected to negative supply voltage respectively. Case of Using Reset Signal except Supply Voltage in the RNA51953 (a) Reset at ON Powersupply (b) Reset at transistor ON Out put RL RNA51953x GND Delay capacitor Powersupply VCC Powersupply RESET Logic circuit Out put RL RNA51953x GND GND Cd Delay capacitor Powersupply VCC RESET Logic circuit GND Cd Control signal Figure 2 Case of Using Reset Signal except Supply Voltage in the RNA51953 REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 7 of 10 RNA51953A, B Preliminary 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 3. VCC + C1 C2 Power-supply Output Example of ripple noise measures RNA51953 GND Delay capacitor Cd Figure 3 Example of Ripple Noise Measures Setting of Delay Capacity Please use capacitor Cd for the delay within the range of 10 F or less. When a value that is bigger than this is set, the problem such as following (1), (2), and (3) becomes remarkable. t VCC tpd Output tPHL Figure 4 Time Chart at Momentary Voltage-Decrease (1) The difference at delay time becomes remarkable. A long delay setting of tens of seconds is fundamentally possible. However, when set delay time is lengthened, the range of the difference relatively grows, too. When a set value is assumed to be ‘tpd’, the difference occurs in the range from 0.47 tpd to 2.05 tpd. For instance, 34 seconds can be calculated at 100 F. However, it is likely to vary within the ranges of 16-70 seconds. (2) Difficulty to react to a momentary voltage decrease. For example, the reaction time tPHL is 10 s when delay capacitor Cd = 0.1 F. The momentary voltage-decrease that is longer than such tPHL are occurs, the detection becomes possible. When the delay capacitance is enlarged, tPHL also becomes long. For instance, it becomes about 100 to 200 s in case of circuit constant C1 = 100 F. (Characteristic graph 1 is used and extrapolation in case of Cd = 100 F.) Therefore, it doesn't react to momentary voltage-decrease that is shorter than this. (3) Original delay time is not obtained. When the momentary voltage-decrease time ‘t’ is equivalent to tPHL, the discharge becomes insufficient and the charge starts at that state. This phenomenon occurs at large capacitance. And, original delay time tpd is not obtained. Please refer to characteristic graph 2. (Delay time versus input pulse width) REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 8 of 10 RNA51953A, B Preliminary Characteristic Graph 1 Reaction Time vs. Delay Capacitance (Example data) Characteristic Graph 2 Delay Time vs. Momentary Voltage Decrease Pulse Width (Example data) 10000 Delay Time tpd (ms) Reaction Time tPHL (μs) 1000 200 100 10 1 0.01 0.1 1 10 Delay Capacitance Cd (μF) 1000 100 Delay Capacitance 0.01 μF 0.033 μF 0.1 μF 0.33 μF 1 μF 2.2 μF 3.3 μF 10 1 1 100 10 100 1000 Pulse Width (μs) 10000 Figure 5 Characteristic Graph Setting of Output Load Resistance (RNA51953B) 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 (2 V to 17 V) RL 6 IL ≤ 4 mA 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/products/common_info/reliability/reliability_root.jsp 2. Additionally, please inquire of our company when there is an uncertain point on use. REJ03D0911-0402 Rev.4.02 Apr 01, 2010 Page 9 of 10 RNA51953A, B Preliminary Package Dimensions JEITA Package Code P-SOP8-4.4x4.85-1.27 RENESAS Code PRSP0008DE-C *1 Previous Code — MASS[Typ.] 0.1g F D 8 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 ) Reference Dimension in Millimeters Symbol 4 1 *3 e Z bp x M A A2 L1 A1 θ L y Detail F JEITA Package Code P-DIP8-6.3x9.6-2.54 RENESAS Code PRDP0008AF-B Previous Code DP-8FV D E A2 A1 A bp b1 c c1 θ HE e x y Z L L1 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 MASS[Typ.] 0.54g D 5 E 8 1 4 b3 0.89 A Z A1 Reference Dimension in Millimeters Symbol L Min e bp θ c e1 ( Ni/Pd/Au plating ) REJ03D0911-0402 Rev.4.02 Apr 01, 2010 e1 D E A A1 bp b3 c θ e Z L Nom Max 7.62 9.60 10.6 6.30 7.4 5.06 0.5 0.40 0.48 0.56 1.30 0.19 0.25 0.31 15° 0° 2.29 2.54 2.79 1.27 2.54 Page 10 of 10 Notice 1. All information included in this document is current as of the date this document is issued. Such information, however, is subject to change without any prior notice. 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