M51958A Renesas Electronics Corporation., M51958A Datasheet
M51958A
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M51958A Summary of contents
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... Voltage Detecting, System Resetting IC Series Description M51957A,B/M51958A,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 the desired retardation time simply by adding an external capacitor. ...
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... L td ≈ 0.34 × Cd(pF) µs REJ03D0778-0300 Rev.3.00 Sep 18, 2007 Page 25µA Typ Output Input 1.25V 1.25V M51958A, B Power- A: Built-in Load supply B: Open Collector 5µA 25µA Typ Typ – GND Delay capacitor M51958A ≈ 0.34 × Cd(pF) µs Output ...
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... Power dissipation Pd Thermal derating Kθ Operating temperature Topr Storage temperature Tstg Input voltage range V IN Electrical Characteristics • “L” reset type M51957A, M51957B • “H” reset type M51958A, M51958B Item Symbol Min Detecting voltage V 1.20 S ∆V Hysteresis voltage S Detecting voltage V /∆ ...
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... M51957A,B/M51958A,B Typical Characteristics Thermal Derating (Maximum Rating) 500 5-pin SIP 8-pin SOP 400 (PRSP0008DE-C) : recommend 300 200 100 Ambient Temperature Ta (°C) Detection Voltage vs. Supply Voltage (Input voltage detection series) 1.28 1.27 1.26 1.25 1.24 1.23 1. Supply Voltage V Delay Capacitance vs. Delay Time (M5195xx, External delay capacitor type) ...
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... M51957A,B/M51958A,B Canstant Current at Cd pin vs. Ambient Temperature (M5195xx, External delay capacitor type) – 15V CC –10 –8 –6 –4 –2 0 –40 – Ambient Temperature Ta (°C) Output Saturation Voltage vs. Output Sink Current 0.3 Supply voltage detecting "L" reset type ...
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... M51957A,B/M51958A,B Example of Application Circuit Reset Circuit of M5195xx Series R 1 Input R 2 Notes: 1. When the detecting supply voltage is 4.25 V, M51951, M51952, M51953 and M51954 are used. In this case, R and R 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 × ...
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... M51957A,B/M51958A,B Delay Waveform Generating Circuit When M51957 and M51958 are used, a waveform with a large delay time can generate only by adding a small capacitor Figure 3 Delay Waveform Generating Circuit Operating Waveform (a) M51957 Input (V partial CC pressure) td Output REJ03D0778-0300 Rev.3.00 Sep 18, 2007 Page ...
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... M51957A,B/M51958A,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 necessary to remove these. Therefore, please install C and C 1 and the GND line as shown in following figure 5 ...
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... M51957A,B/M51958A,B Independent Power-supply Input M51957 Vin M51958 GND Example 1. Independent power supply system Please do enough verifying about transition characteristic of V and 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 ...
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... M51957A,B/M51958A,B Setting of Delay Capacity Please use capacitor Cd for the delay within the range of 10 µF or less. When a value that is bigger than this is set, the problem such as following (1), (2), and (3) becomes remarkable. Figure 9 Time Chart at Momentary Voltage-Decrease (1) The difference at delay time becomes remarkable. ...
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... M51957A,B/M51958A,B Setting of Output Load Resistance (M51957B/M51958B) 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 ( within the range of the power-supply voltage recommendation. ...
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... M51957A,B/M51958A,B Package Dimensions 5P5T EIAJ Package Code JEDEC Code – SIP5-P-240-2. SEATING PLANE JEITA Package Code RENESAS Code P-SOP8-4.4x4.85-1.27 PRSP0008DE Index mark REJ03D0778-0300 Rev.3.00 Sep 18, 2007 Page Weight(g) Lead Material 0.22 Cu Alloy ...
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... M51957A,B/M51958A,B JEITA Package Code RENESAS Code P-SOP8-4.4x5-1.27 PRSP0008DA Index mark * REJ03D0778-0300 Rev.3.00 Sep 18, 2007 Page Previous Code MASS[Typ.] 8P2S-A 0.07g NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET ...
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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 ...