IL1705D

DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 10

Technical content

Micro Monitor Supply Control The IN1705 is designed to control power supply and to start mi- crocontroller 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.

ORDERING INFORMATION

TA = -40° to 85° C for all packages. 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 IN1705 m icroprocessor;
• generation of reset signal when pushing reset button;
• possibility to program threashold voltage at which reset signal is generated. The IN1705 contains a source of reference voltage, two analog comparators, watchdog timer, digital sampler, digital delay.. Functions: PBRST 1 Vcc 2 GND 3 IN 4 5 NMI 6 ST

7 RST

8 WDS• 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. Fig. 2 – Pin assignment

Industrial temperature range Industrial temperature range - 40°С to + 85°С. Table 1 – Recommended operating conditions Symbol Parameter Typical Units min max VСС Supply voltage 1.2 5.5 V VIH Input voltage, high level 2.0 VСС+0.3 V VIL Input voltage, low level -0.03 0.5 V ТA Operating temperature range -40 85 °С Table 2 – Absolute maximum ratings Symbol Parameter Typical Units min max VСС Supply voltage -0.5 7.0 V VIH Input voltage, high level - VСС+0.5 V VIL Input voltage, low level -0.5 - V Tstg Storage temperature -60 125 °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 operat- ing conditions.

Table 3 – DC electrical characteristics (TA = - 40° to + 85°С) Symbol Parameter Test conditions Typical Units min max VIL Input voltage, low level VСС=from 2.4 to 5.5V - 0.5 V VIH Input voltage, high level VСС=from 2.4 to 5.5V 2.0 V 7IOL Output current, low level (NMI, RST) VСС=from 2.4 to 5.5V VOL= 0.4V 10.0 - mA IOH Output current, high level (WDS, NMI) VСС=from 4.5 to 5.5V VOH= 2.4V -100 -1000 µA IOH1 Output current, high level, (RST) VCC =from 5.0 to 5.5V VOH=2.4V -10 - mA VOH Output voltage, high level (RST) VСС=from 5.0 to 5.5V IOH= -500мкА VСС-0.3 - V ILIL1 Input leakage current, low level (IN) VСС=from 1.2 to 5.5V VIL= 0 V - -1.0 µA ILIL2 Input leakage current, low level (ST) VСС= 5.5V VIL= 0 V -10 -100 µA ILIL3 Input leakage current, low level (PBRST) VСС= 5.5V VIL= 0 V -50 -450 µA ILIH Input leakage current, high level VСС=from 1.2 to 5.5V VIH = VСС - 1.0 µA IСС Operating current VСС=from 1.2 to 5.5V VIL=0 V, VIH=VCC - 60 µA VCCTP VCC trip point VIL= 0 V, VIH=VCC 4.5 4.75 V VTP IN input trip point VСС=5.0 V VIL= 0 V, VIH=VCC 1.2 1.3 V

Table 4 – AC electrical characteristics (VСС= 5.0 В, ТA = - 40° to + 85°С) Symbol Parameter Typical Units min max tTD Watchdog timeout 1.0 2.2 s tPDLY PBRST stable low to RST and RST - 250 ns tRST Reset active time 130 285 ms tRPD VСС detect to RST and RST - 8.0 µs tRPU VСС detect to RST and RST 130 285 ms tIPD VIN detect to NMI - 8.0 µs tPB (PBRST= VIL) 150 - ns tST ST Pulse Width 10 - ns

____ RST Fig. 3 – Timing diagram of forming reset signal from external PBRST control button ____ WDS t TD MIN MAX t ST ___ RST Reset initiated by pushbutton ___ ST Indeterminate strobe Valid strobe Invalid strobe Fig. 4 – Timing diagram: strobe input

____ RST VCC VCCTP (MIN) VCCTP VCCTP (MAX) V OL ____ WDS slews with VCC ____ WDS t RPD t F Fig. 5 – Timing diagram: power down to VCCTP

____ RST VCC VCCTP (MIN) VCCTP VCCTP (MAX) V OH ____ WDS Fig. 6 – Timing diagram: Power-Up

V I > 1,25 B ____ NMI VOH V OL t IPD t IPD VTP (MIN) VTP (MAX) VTP VTP (MIN) VTP VTP (MAX) Fig. 7 – Timing diagram: Non-Maskable Interrupt

+ Digital Sampler Digital Sampler Digital delay Watchdog Timer Schmitt Trigger ____ NMI ____ RST ____ WDS Fig. 8 – Block Diagram Table 5 – Pin description Pin Symbol Description Type

01 PBRST Pushbutton reset input Input

02 Vcc Power supply -

03 GND Ground -

04 IN Input Input

05 NMI Non-maskable interrupt Output

06 ST Watchdog timer strobe Input

07 RST Active low reset Output

08 WDS Watchdog status Output

(MS – 001BA) Symbol MIN MAX A 8.51 10.16 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0° 10° K 2.92 3.81 NOTES: L 7.62 8.26 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SUFFIX SOIC (MS - 012AA) 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 H J 0° 8° NOTES: K 0.1 0.25 1. Dimensions A and B do not include mold flash or protrusion. M 0.19 0.25 1.27 5.72 Dimension, mm Dimension, mm 2.54 7.62 A BH C K C M J F M P G D R x 45 SEATING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C