MAX6301 DS.J

Transcription

1 ; Rev 0; 6/96 µ µ µ FEATURE Active-Low Reset Active-High Reset Open-Drain Reset Output Push/Pull Reset Output Pins-Package TOP VIEW 8-DIP/SO/ µmax 8-DIP/SO/ µmax 8-DIP/SO/ µmax 8-DIP/SO/ µmax µ µ µ PART CPA CSA CUA EPA ESA V IN R1 R2 1 2 IN TEMP. RANGE 0 C to +70 C 0 C to +70 C 0 C to +70 C -40 C to +85 C -40 C to +85 C () 8 7 PIN-PACKAGE 8 Plastic DIP 8 SO 8 µmax 8 Plastic DIP 8 SO ONLY R L IN SRT SWT DIP/SO/µMAX ( ) ARE FOR / () WDI WDS C SRT 3 4 SRT C SWT SWT WDI WDS 6 5 ( ) ARE FOR /. R L ONLY I/O µp WDS = 0 FOR NORMAL MODE WDI = 1 FOR EXTENDED MODE * Maxim Integrated Products 1

2 ABSOLUTE MAXIMUM RATINGS V to +7.0V IN, SWT, SRT V to ( + 0.3V) WDI, WDS V to ( + 0.3V), V to +7.0V /6303/ V to ( + 0.3V) Input Current...±20mA...±20mA Output Current,...±20mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Continuous Power Dissipation (T A = +70 C) Plastic DIP (derate 9.09mW/ C above +70 C)...727mW SO (derate 5.88mW/ C above +70 C)...471mW µmax (derate 4.10mW/ C above +70 C)...330mW Operating Temperature Ranges MAX630_C_A...0 C to +70 C MAX630_E_A C to +85 C Storage Temperature Range C to +160 C Lead Temperature (soldering, 10sec) C ( = +2V to +5.5V, T A = T MIN to T MAX, unless otherwise noted. Typical values are at = +5V and T A = +25 C.) PARAMETER Operating Voltage Range (Note 1) Supply Current (Note 2) TIMER Reset Input Threshold Voltage Reset Input Hysteresis Reset Input Leakage Current Reset Output Voltage High (//) Reset Output Voltage Low (//) to Reset Delay Reset Input Pulse Width Reset Timeout Period (Note 3) Reset Output Leakage Current SYMBOL C/C E/E / I CC No load V TH V HYST I IN V OH V OL t RD t RI t RP V IN falling, = 5.0V V IN rising, = 5.0V 4.5V, I SOURCE = 0.8mA = 2V, I SOURCE = 0.4mA /, = 1.31V, R L = 10kΩ 4.5V, I SINK = 3.2mA = 2V, I SINK = 1.6mA / falling at 1mV/µs Comparator overdrive = 50mV C SRT = 1500pF CONDITIONS = 1V, I SINK = 50µA, T A = 0 C to +70 C = 1.2V, I SINK = 100µA, T A = -40 C to +85 C, V =, V = MIN TYP MAX ±0.01 ±1-0.4 VCC ±1 ±1 UNITS V µa V mv na V V µs µs ms µa 2

3 ELECTRICAL CHARACTERISTICS (continued) ( = +2V to +5.5V, T A = T MIN to T MAX, unless otherwise noted. Typical values are at = +5V and T A = +25 C.) PARAMETER WATCHDOG TIMER WDI, WDS Input Threshold WDI Pulse Width V IH CONDITIONS 0.7 V IL = 4.5V to 5.5V 30 t WP = 2V to 4.5V V WDI, WDS Leakage Current Extended mode disabled ±1 µa WDI Sink/Source Current (Note 4) SYMBOL MIN TYP MAX Watchdog Timeout Period WDS =, C SWT = 1500pF ms t (Note 3) WD WDS =, C SWT = 1500pF sec UNITS Extended mode enabled ±70 µa Note 1: Reset is guaranteed valid from the selected reset threshold voltage down to the minimum. Note 2: VDS =, WDI unconnected. Note 3: Precision timing currents of 500nA are present at both the SRT and SWT pins. Timing capacitors connected to these nodes must have low leakage consistent with these currents to prevent timing errors. Note 4: The sink/source is supplied through a resistor, and is proportional to (Figure 8). At = 2V, it is typically ±24µA. ns (C SWT = C SRT = 1500pF, T A = +25 C, unless otherwise noted.) TIMEOUT PERIOD (ms) 10, = 5V TIMEOUT PERIOD vs. C SRT TOC-01 WATCHDOG TIMEOUT PERIOD (sec) 10, EXTENDED-MODE WATCHDOG TIMEOUT PERIOD vs. C SWT (WDS = ) = 5V TOC-02 WATCHDOG TIMEOUT PERIOD (ms) 10, NORMAL-MODE WATCHDOG TIMEOUT PERIOD vs. C SWT (WDS = ) = 5V TOC C SRT (nf) C SWT (nf) C SWT (nf) 3

4 (C SWT = C SRT = 1500pF, T A = +25 C, unless otherwise noted.) SUPPLY CURRENT (µa) SUPPLY CURRENT vs. SUPPLY VOLTAGE DEASSERTED NO LOAD SUPPLY VOLTAGE (V) TOC-04 trp/twd (ms) AND NORMAL-MODE WATCHDOG TIMEOUT PERIOD vs. TEMPERATURE = 5.0V TEMPERATURE ( C) TOC-05 TRANSIENT DURATION (µs) MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE (V RST) OCCURS ABOVE THE CURVE SEE NEGATIVE-GOING TRANSIENTS SECTION V RST = 4.60V THRESHOLD OVERDRIVE (mv) TOC-06 SUPPLY CURRENT (µa) SUPPLY CURRENT vs. TEMPERATURE DEASSERTED NO LOAD = 5.0V = 2.0V TEMPERATURE ( C) TOC-07 REFERENCE VOLTAGE (V) IN THRESHOLD VOLTAGE vs. TEMPERATURE TEMPERATURE ( C) TOC-08 PROPAGATION DELAY (µs) TO DELAY vs. TEMPERATURE ( FALLING) FALLING AT 1mV/µs TOC-09 trp/twp (ms) AND WATCHDOG TIMEOUT vs TOC TEMPERATURE ( C) SUPPLY VOLTAGE (V) 4

5 1 IN 2 3 SRT 4 SWT 5 WDS 6 WDI µ µ 7 (/3) (/4) 8 5

6 µ µ µ VTH ( R1+ R2 ) VRST = ( V ) R2 R1 R2 V IN IN VRST R1= R2 1 VTH V RST = 1.22 ( R1 + R2 ) R2 ( Ω) µ µ µ 6

7 t WDI WD 0V 0V NORMAL MODE (WDS = ) t RP WDI t WD x 500 t RP 0V 0V EXTENDED MODE (WDS = ) µ SRT SWT C SRT C SWT C RST = t RP 2.67 C RST in pf t WD in µs C SWT = t WD 2.67 C SWT in pf t WD in µs 7

8 R1 R2 V IN IN V RST = 1.22 ( R1 + R2 ) R2 VCC * WDI WDS * THREE-STATE LEAKAGE MUST BE <10µA. 80C51 RST I/O I/O I/O µ C SRT = t RP 2.67 µ µ C SWT = t WD 2.67 µ µ µ µ µ µ µ µ 8

9 IN µ µ µ µ µ R1 R2 TO OTHER SYSTEM COMPONENTS µ WDI WDS µ 4.7k WATCHDOG TIMER TO MODE CONTROL µp TO GENERATOR 9

10 VCC µ 100k VCC 100k START SET WDI LOW SUBROUTINE OR PROGRAM LOOP SET WDI HIGH RETURN END 10

11 _ PART TEMP. RANGE PIN-PACKAGE CPA CSA CUA 0 C to +70 C 0 C to +70 C 0 C to +70 C 8 Plastic DIP 8 SO 8 µmax EPA -40 C to +85 C 8 Plastic DIP ESA -40 C to +85 C 8 SO CPA 0 C to +70 C 8 Plastic DIP CSA 0 C to +70 C 8 SO CUA 0 C to +70 C 8 µmax EPA -40 C to +85 C 8 Plastic DIP ESA -40 C to +85 C 8 SO CPA 0 C to +70 C 8 Plastic DIP CSA 0 C to +70 C 8 SO CUA 0 C to +70 C 8 µmax EPA -40 C to +85 C 8 Plastic DIP ESA -40 C to +85 C 8 SO TRANSISTOR COUNT:

12 e B E A A1 H 0.101mm in C L α DIM A A1 B C D E e H L α MIN INCHES MAX MILLIMETERS MIN MAX D D 8-PIN µmax MICROMAX SMALL-OUTLINE PACKAGE e D B A1 A 0.101mm 0.004in. C L 0-8 DIM A A1 B C E e H L MIN INCHES MAX MILLIMETERS MIN MAX E H Narrow SO SMALL-OUTLINE PACKAGE (0.150 in.) DIM D D D PINS INCHES MIN MAX MILLIMETERS MIN MAX A 12 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA (408) Maxim Integrated Products is a registered trademark of Maxim Integrated Products.