TECHNICAL DATA Micro Monitor Supply Control KK1705 The KK1705 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. ORDERING INFORMATION KK1705N Plastic KK1705D 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 WDS Vcc 2 7 RST 3 6 ST IN 4 5 NMI GND Fig. 2 – Pin assignment 1 KK1705 Industrial temperature range Industrial temperature range - 40°С to + 85°С. Table 1 – Recommended operating conditions Symbol Parameter VСС Supply voltage VIH VIL ТA Input voltage, high level Input voltage, low level Operating temperature range Typical Units min max 1.2 5.5 V 2.0 -0.03 -40 VСС+0.3 0.5 85 V V °С Table 2 – Absolute maximum ratings Symbol Parameter Typical Units min max VСС Supply voltage -0.5 7.0 V VIH VIL Tstg Input voltage, high level Input voltage, low level Storage temperature -0.5 -60 VСС+0.5 125 V V °С 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 KK1705 Table 3 – DC electrical characteristics (TA = - 40° to + 85°С) Symbol VIL VIH 7IOL IOH IOH1 VOH ILIL1 ILIL2 ILIL3 ILIH IСС VCCTP VTP Parameter Test conditions VСС=from 2.4 to 5.5V Input voltage, high level VСС=from 2.4 to 5.5V Output current, low VСС=from 2.4 to 5.5V level (NMI, RST) VOL= 0.4V Output current, high VСС=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 VСС=from 5.0 to (RST) 5.5V IOH= -500мкА Input leakage current, VСС=from 1.2 to low level (IN) 5.5V VIL= 0 V Input leakage current, VСС= 5.5V low level (ST) VIL= 0 V Input leakage current, VСС= 5.5V low level (PBRST) VIL= 0 V Input leakage current, VСС=from 1.2 to high level 5.5V VIH = VСС Operating current VСС=from 1.2 to 5.5V VIL=0 V, VIH=VCC VCC trip point VIL= 0 V, VIH=VCC IN input trip point VСС=5.0 V VIL= 0 V, VIH=VCC Input voltage, low level Typical Units min max - 0.5 2.0 V V 10.0 - mA -100 -1000 µA -10 - mA VСС-0.3 - V - -1.0 µA -10 -100 µA -50 -450 µA - 1.0 µA - 60 µA 4.5 1.2 4.75 1.3 V V 3 KK1705 Table 4 – AC electrical characteristics (VСС= 5.0 В, ТA = - 40° to + 85°С) Symbol Parameter Typical Units min max Watchdog timeout PBRST stable low to RST and RST Reset active time VСС detect to RST and RST VСС detect to RST and RST VIN detect to NMI 1.0 130 130 - 2.2 250 285 8.0 285 8.0 s ns ms µs ms µs tPB (PBRST= VIL) 150 - ns tST ST Pulse Width 10 - ns tTD tPDLY tRST tRPD tRPU tIPD 4 KK1705 Timing diagrams tPB ______ PBRST tPDLY VIH VIL tRST ____ RST VOH Fig. 3 – Timing diagram of forming reset signal from external PBRST control button ___ ST Invalid strobe t ST Indeterminate strobe Valid strobe MIN MAX t TD ____ WDS Reset initiated by pushbutton ___ RST Fig. 4 – Timing diagram: strobe input 5 KK1705 tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) t RPD ____ RST V OL ____ WDS ____ WDS slews with VCC Fig. 5 – Timing diagram: power down to VCCTP 6 KK1705 tR VCCTP (MAX) VCCTP (MIN) VCC VCCTP t RPU V OH ____ RST ____ WDS Fig. 6 – Timing diagram: Power-Up 7 KK1705 V I > 1,25 B VTP (MAX) VTP ____ NMI VTP (MIN) t IPD VTP (MIN) VTP (MAX) VTP t IPD VOH V OL Fig. 7 – Timing diagram: Non-Maskable Interrupt 8 KK1705 IN Digital Sampler + Reference voltage source Digital Sampler Vcc ____ NMI + ______ PBRST Digital delay ____ RST Watchdog Timer ____ WDS Schmitt Trigger __ ST GND Fig. 8 – Block Diagram Table 5 – Pin description Pin Symbol Description 01 PBRST 02 Vcc Power supply - 03 GND Ground - 04 IN 05 NMI Non-maskable interrupt Output 06 ST Watchdog timer strobe Input 07 RST Active low reset Output 08 WDS Watchdog status Output Pushbutton reset input Input Type Input Input 9 KK1705 N SUFFIX PLASTIC DIP (MS – 001BA) A Dimension, mm 5 8 B 1 4 C -T- SEATING PLANE N G M K 0.25 (0.010) M J H D MIN MAX A 8.51 10.16 B 6.1 7.11 5.33 C L F Symbol T 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 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 012AA) Dimension, mm A 8 5 B H 1 G P 4 R x 45 C -TD K SEATING PLANE J F 0.25 (0.010) M T C M 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. M Symbol MIN MAX A 4.8 5 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G 1.27 H 5.72 J 0° 8° K 0.1 0.25 M 0.19 0.25 P 5.8 6.2 R 0.25 0.5 10