SP706PCP

SP706P SIPEX | Alldatasheet

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Technical content

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation SP706P/R/S/T, SP708R/S/T I Precision Low Voltage Monitor: SP706P/R and SP708R at +2.63V SP706S and SP708S at +2.93V SP706T and SP708T at +3.08V I RESET Pulse Width - 200ms I Independent Watchdog Timer - 1.6 sec Timeout (SP706P/S/R/T) I 40µA Maximum Supply Current I Debounced TTL/CMOS Manual-Reset Input I RESET Asserted Down to VCC = 1V I RESET Output: SP706P Active-High SP706R/S/T Active-Low SP708R/S/T Both Active High + Active Low I WDI Can Be Left Floating, Disabling the Watchdog Function

DESCRIPTION

The SP706P/S/R/T, SP708R/S/T series is a family of microprocessor (µP) supervisory circuits that integrate myriad components involved in discrete solutions which monitor power-supply and battery, in µP, and digital systems. The SP706P/S/R/T, SP708R/S/T series will significantly improve system reliability and operational efficiency when compared to results obtained with discrete components. The features of the SP706P/S/R/T, SP708R/S/T series include a watchdog timer, a µP reset, a Power Fail Comparator, and a manual-reset input. The SP706P/ S/R/T, SP708R/S/T series is ideal for +3.0V or +3.3V applications in automotive systems, computers, controllers, and intelligent instruments. The SP706P/S/R/T, SP708R/S/T series is an ideal solution for systems in which critical monitoring of the power supply to the µP and related digital components is demanded. rebmuNtraPe vitcATESERd lohserhTTESERt eseRlaunaMy caruccAIFPt upnIgodhctaW P607PS HGIHV 36.2S EY% 4S EY R607PS WOLV 36.2S EY% 4S EY S607PS WOLV 39.2S EY% 4S EY T607PS WOLV 80.3S EY% 4S EY R807PS HGIH/WOLV 36.2S EY% 4O N S807PS HGIH/WOLV 39.2S EY% 4O N T807PS HGIH/WOLV 80.3S EY% 4O N I Built-In Vcc Glitch Immunity I Available in 8-pin PDIP, NSOIC, and µSOIC packages I Voltage Monitor for Power Failure or Low Battery Warning I Pin Compatible Enhancement to Industry Standards 706P/R/S/T and 708R/S/T +3.0V/+3.3V Low Power Microprocessor Supervisory Circuits

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation SPECIFICATIONS typical at 25°C. ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Terminal Voltage (with respect to GND): V Input Current: RETEMARAP. NIM. PYT. XAMS TINUS NOITIDNOC V,egnaRegatloVgnitarepO CC 0.15 .5V I,tnerruCylppuS YLPPUS 520 4 µA V=RM CC gnitaolFIDW,gnitaolFro dlohserhTteseR5 5.2 58.2 00.3 36.2 39.2 80.3 07.2 00.3 51.3 V R/P_07PS S_07PS T_07PS siseretsyHdlohserhTteseR0 2V m2 etoN t,htdiWesluPteseR SR 0410 020 82s m2 etoN TESERe gatloVtuptuO V HO V LO V HO V LO Vx8.0 CC V CC 5.1- 3.0 4.0 V V )XAM(TSR V< CC I,V6.3< ECRUOS 005= µA V )XAM(TSR V< CC I,V6.3< KNIS 2.1=m A V<V5.4 CC I,V5.5< ECRUOS 008= µA V<V5.4 CC I,V5.5< KNIS Am2.3= egatloVtuptuOTESER V HO V LO V HO V LO V CC 6.0- V CC 5.1- 3.0 4.0 V V )XAM(TSR V< CC I,V6.3< ECRUOS 512= µA V )XAM(TSR V< CC I,V6.3< ECRUOS Am2.1= V<V5.4 CC I,V5.5< ECRUOS 008= µA V<V5.4 CC I,V5.5< ECRUOS Am2.3= t,doirePtuoemiTgodhctaW DW 00.10 6.15 2.2s V CC V6.3< t,htdiWesluPIDW PW 05s nV LI V,V4.0= HI Vx8.0= CC ,dlohserhTtupnIIDW V LI V HI V LI V HI Vx7.0 CC 5.3 6.0 8.0 V V )XAM(TSR V< CC V6.3< V TSR) XAM( V< CC V6.3< V CC V0.5= V CC V0.5= tnerruCtupnIIDW1 -2 0.01 µA Vro0=IDW CC Continuous Power Dissipation Plastic DIP (derate 9.09mW/ SO (derate 5.88mW/ Mini SO (derate 4.10mW/

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation SPECIFICATIONS (continued) typical at 25°C. RETEMARAP. NIM. PYT. XAMS TINUS NOITIDNOC egatloVtuptuOODW V HO V LO V HO V LO Vx8.0 CC V CC 5.1- 3.0 4.0 V V )XAM(TSR V< CC I,V6.3< ECRUOS 005= µA V )XAM(TSR V< CC I,V6.3< KNIS Am2.1= V<V5.4 CC I,V5.5< ECRUOS 008= µA V<V5.4 CC I,V5.5< KNIS Am2.3= RMt nerruCpU-lluP5 2 001 052 052 006 µA RMV ,V0= )XAM(TSR V< CC V6.3< V<V5.4,V0=RM CC V5.5< RMt ,htdiWesluP RM 005 051 sn V )XAM(TSR V< CC V6.3< V<V5.4 CC V5.5< RMd lohserhTtupnI V LI V HI V LI V HI Vx7.0 CC 0.2 6.0 8.0 V V )XAM(TSR V< CC V6.3< V )XAM(TSR V< CC V6.3< V<V5.4 CC V5.5< V<V5.4 CC V5.5< RMt ,yaleDtuOteseRot DM 057 052 sn V )XAM(TSR V< CC 2ETON,V6.3< V<V5.4 CC 2ETON,V5.5< dlohserhTtupnIIFP 02.15 2.10 3.1V V CC ehtrofV0.3= R/P_07PS V, CC = ehtrofV3.3 T/S_07PS gnillafIFP, tnerruCtupnIIFP0 0.52-1 0.00 0.52A n OFPe gatloVtuptuO V HO V LO V HO V LO Vx8.0 CC V CC 5.1- 3.0 4.0 V V )XAM(TSR V< CC I,V6.3< ECRUOS 005= µA V )XAM(TSR V< CC I,V6.3< KNIS 2.1=m A V<V5.4 CC I,V5.5< ECRUOS 008= µA V<V5.4 CC I,V5.5< KNIS Am2.3=

Figure 1. Pinouts

Table 1. Device Pin Description

Figure 2. Internal Block Diagram for the SP706P/R/S/T

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation the reset threshold, an internal timer releases RESET after 200ms. RESET pulses LOW when- ever V CC dips below the reset threshold, such as in a brownout condition. When a brownout condition occurs in the middle of a previously initiated reset pulse, the pulse continues for at least another 140ms. During power-down, once V CC falls below the reset threshold, RESET stays LOW and is guaranteed to be 0.4V or less until V CC drops below 1V. The active-HIGH RESET output is simply the complement of the RESET output and is guaranteed to be valid with V CC down to 1.1V. Some µPs, such as Intel's 80C51, require an active-HIGH reset pulse. Watchdog Timer The SP706P/R/S/T-SP708R/S/T series watchdog circuit monitors the µP's activity. If the µP does not toggle the watchdog input (WDI) within 1.6 seconds and WDI is not tri-stated, WDO goes LOW. As long as RESET is asserted or the WDI input is tri-stated, the watchdog timer will stay cleared and will not count. As soon as RESET is released and WDI is driven HIGH or LOW, the timer will start counting. Pulses as short as 50ns can be detected. Typically, WDO will be connected to the non-maskable interrupt input (NMI) of a µP. When V CC drops below the reset threshold, WDO will go LOW independent of the current status of the watchdog timer. Normally this would trigger an NMI but RESET goes LOW simulta- neously, and thus overrides the NMI. If WDI is left unconnected, WDO can be used as a low-line output. Since floating WDI disables the internal timer, WDO goes LOW only when V CC falls below the reset threshold, thus functioning as a low-line output. Power-Fail Comparator The power-fail comparator can be used for various purposes because its output and noninverting input are not internally connected. The inverting input is internally connected to a 1.25V reference.

FEATURES

The SP706P/R/S/T-SP708R/S/T series provides four key functions: 1. A reset output during power-up, power-down and brownout conditions. 2. An independent watchdog output that goes LOW if the watchdog input has not been toggled within 1.6 sec. 3. A 1.25V threshold detector for power-fail warning, low battery detection, or monitoring a power supply other than +3.3V/+3.0V. 4. An active-LOW manual-reset that allows RESET to be triggered by a pushbutton switch. The SP706R/S/T devices are the same as the SP708R/S/T devices except for the active-HIGH RESET substitution of the watchdog timer. The SP706P device is the same as the SP706R de- vice except an active-HIGH RESET is provided rather than an active-LOW RESET. THEORY OF OPERATION The SP706P/R/S/T-SP708R/S/T series is a mi- croprocessor (µP) supervisory circuit that moni- tors the power supplied to digital circuits such as microprocessors, microcontrollers, or memory. The series is an ideal solution for portable, battery-powered equipment that re- quires power supply monitoring. Implementing this series will reduce the number of compo- nents and overall complexity of a system. The watchdog functions of this product family will continuously oversee the operational status of a system. The operational features and benefits of the SP706P/R/S/T-SP708R/S/T series are de- scribed, in more detail, below. RESET Output A microprocessor's reset input starts the µP in a known state. The SP706P/R/S/T-SP708R/ S/T series asserts reset during power-up and prevents code execution errors during power- down or brownout conditions. During power-up, once V CC reaches 1V, RESET is a guaranteed logic LOW of 0.4V or less. As V CC rises, RESET stays LOW. When VCC rises above

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation D ALTERNATE END PINS (BOTH ENDS) D1 = 0.005" min. (0.127 min.) E PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) A = 0.210" max. (5.334 max). C ØL A1 = 0.015" min. (0.381min.) B e = 0.100 BSC (2.540 BSC) eA = 0.300 BSC (7.620 BSC) B C D E L Ø 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 8–PIN

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) 8–PIN A Ø LBe h x 45° A B D E e H h L Ø 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988)

0.050 BSC

(1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation PACKAGE: PLASTIC MICRO SMALL OUTLINE (µSOIC) 0.013 ±0.005 0.0256 BSC 0.118 ±0.004 0.020 0.020 0.116 ±0.004 0.034 ±0.004 0.040 ±0.003 0.004 ±0.0020.118 ±0.004 0.118 ±0.004 0.037 Ref 0.0215 ±0.006 3.0˚ ±3˚ R .003 12.0˚ ±4˚ 0.006 ±0.006 0.006 ±0.006 0.008 0˚ - 6˚ 0.012 ±0.003 0.01 12.0˚ ±4˚ 0.16 ±0.003 0.0965 ±0.003 0.116 ±0.004

50 USOIC devices per tube

All package dimensions are in inches

Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits © Copyright 2000 Sipex Corporation

ORDERING INFORMATION

Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Sipex Corporation Headquarters and Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office

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