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| TECHNICAL DATA Micro Monitor Supply Control The IN1705 is designed to control power supply and to start microcontroller and microprocessor systems. It is used for securing stable functioning of the system when starting and halting the device as well as in the case of the supply voltage drops. Manufactured in 8-pin SOIC/DIP package MS-012AA. LSI features: * * * * * rated supply voltage 5.0 V; generation of reset signal when power supply is on for correct start of microprocessor; generation of reset signal when power supply drops below the operating one to avoid incorrect functioning of microprocessor; generation of reset signal when pushing reset button; possibility to program threashold voltage at which reset signal is generated. IN1705 ORDERING INFORMATION IL1705N Plastic IL1705D SOIC TA = -40 to 85 C for all packages. The IN1705 contains a source of reference voltage, two analog comparators, watchdog timer, digital sampler, digital delay.. Functions: * * * * generation of reset signal per fixed level of supply voltage; generation of reset signal from external "Reset" button; generation of signal of watchdog timer status; emergency interruption of primary power source. PBRST 1 8 7 6 5 WDS RST ST NMI Vcc 2 GND 3 IN 4 Fig. 2 - Pin assignment 1 IN1705 Industrial temperature range Industrial temperature range - 40 to + 85. Table 1 - Recommended operating conditions Symbol V VIH VIL A Parameter min Supply voltage Input voltage, high level Input voltage, low level Operating temperature range 1.2 2.0 -0.03 -40 Typical max 5.5 V+0.3 0.5 85 V V V Units Table 2 - Absolute maximum ratings Symbol V VIH VIL Tstg Parameter min Supply voltage Input voltage, high level Input voltage, low level Storage temperature -0.5 -0.5 -60 Typical max 7.0 V+0.5 125 V V V Units Exposure to absolute maximum rating conditions may affect reliability of IC and its functional operation. Upon removing the absolute maximum ratings conditions, functional operation is guaranteed in recommended operating conditions. 2 IN1705 Table 3 - DC electrical characteristics (TA = - 40 to + 85) Symbol VIL VIH 7IOL Parameter Input voltage, low level Test conditions min Typical max Units IOH IOH1 VOH ILIL1 ILIL2 ILIL3 ILIH I VCCTP VTP V=from 2.4 to 5.5V Input voltage, high level V=from 2.4 to 5.5V Output current, low V=from 2.4 to 5.5V level (NMI, RST) VOL= 0.4V Output current, high V=from 4.5 to level (WDS, NMI) 5.5V VOH= 2.4V Output current, high VCC =from 5.0 to level, (RST) 5.5V VOH=2.4V Output voltage, high level V=from 5.0 to (RST) 5.5V IOH= -500 Input leakage current, V=from 1.2 to low level (IN) 5.5V VIL= 0 V Input leakage current, V= 5.5V low level (ST) VIL= 0 V Input leakage current, V= 5.5V low level (PBRST) VIL= 0 V Input leakage current, V=from 1.2 to high level 5.5V VIH = V Operating current V=from 1.2 to 5.5V VIL=0 V, VIH=VCC VCC trip point VIL= 0 V, VIH=VCC IN input trip point V=5.0 V VIL= 0 V, VIH=VCC 2.0 10.0 0.5 V V - mA -100 -1000 A -10 - mA V-0.3 - V - -1.0 A -10 -50 - -100 -450 1.0 A A A - 60 A 4.5 1.2 4.75 1.3 V V 3 IN1705 Table 4 - AC electrical characteristics (V= 5.0 , A = - 40 to + 85) Symbol Parameter min Typical max Units tTD tPDLY tRST tRPD tRPU tIPD tPB tST Watchdog timeout PBRST stable low to RST and RST Reset active time V detect to RST and RST V detect to RST and RST VIN detect to NMI (PBRST= VIL) ST Pulse Width 1.0 130 130 150 10 2.2 250 285 8.0 285 8.0 - s ns ms s ms s ns ns 4 IN1705 Timing diagrams ______ PBRST VIL tRST ____ RST tPB tPDLY VIH VOH Fig. 3 - Timing diagram of forming reset signal from external PBRST control button ___ ST Invalid strobe Valid strobe Indeterminate strobe t ST MIN t TD MAX ____ WDS Reset initiated by pushbutton ___ RST Fig. 4 - Timing diagram: strobe input 5 IN1705 VCC VCCTP (MAX) VCCTP tF VCCTP (MIN) ____ RST t RPD V OL ____ WDS ____ WDS slews with VCC Fig. 5 - Timing diagram: power down to VCCTP 6 IN1705 tR VCCTP (MAX) VCCTP (MIN) VCC VCCTP t RPU V OH ____ RST ____ WDS Fig. 6 - Timing diagram: Power-Up 7 IN1705 V I > 1,25 B VTP (MAX) VTP VTP (MIN) VTP (MIN) VTP (MAX) VTP ____ NMI t IPD t IPD VOH V OL Fig. 7 - Timing diagram: Non-Maskable Interrupt 8 IN1705 IN + - Digital Sampler ____ NMI Reference voltage source Vcc + Digital Sampler Digital delay ____ RST ______ PBRST __ ST Schmitt Trigger Watchdog Timer ____ WDS GND Fig. 8 - Block Diagram Table 5 - Pin description Pin 01 02 03 04 05 06 07 08 Symbol PBRST Vcc GND IN NMI ST RST WDS Description Pushbutton reset input Power supply Ground Input Non-maskable interrupt Watchdog timer strobe Active low reset Watchdog status Type Input Input Output Input Output Output 9 IN1705 N SUFFIX PLASTIC DIP (MS - 001BA) A 8 5 B 1 4 Dimension, mm Symbol A B MIN 8.51 6.1 MAX 10.16 7.11 5.33 0.36 1.14 2.54 7.62 0 2.92 7.62 0.2 0.38 10 3.81 8.26 0.36 0.56 1.78 F L C D C -T- SEATING N G D 0.25 (0.010) M T K PLANE F G M H J H J K L M N NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. D SUFFIX SOIC (MS - 012AA) Dimension, mm 5 A 8 Symbol A B P MIN 4.8 3.8 1.35 0.33 0.4 1.27 5.72 0 0.1 0.19 5.8 0.25 MAX 5 4 1.75 0.51 1.27 H B C 1 G 4 C R x 45 D F G J F M -TD 0.25 (0.010) M T C M K SEATING PLANE H J K M P R 8 0.25 0.25 6.2 0.5 NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side. 10 |
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