MOTOROLA MAX810TTR, MAX810STR, MAX810LTR, MAX809JTR, MAX809LTR Datasheet

MAX809, MAX810

3-Pin Microprocessor

Reset Monitors

The MAX809 and MAX810 are cost±effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.

The reset output is driven active within 20 μsec of VCC falling through the reset voltage threshold. Reset is maintained active for a minimum of 140msec after VCC rises above the reset threshold. The MAX810 has an active±high RESET output while the MAX809 has an active±low RESET output. The output of the MAX809 is guaranteed valid down to VCC = 1V. Both devices are available in a SOT±23 package.

The MAX809/810 are optimized to reject fast transient glitches on the VCC line. Low supply current of 17μA (VCC = 3.3V) makes these

devices suitable for battery powered applications.

Features

•Precision VCC Monitor for 3.0V, 3.3V, and 5.0V Supplies

•140msec Guaranteed Minimum RESET, RESET Output Duration

•RESET Output Guaranteed to VCC = 1.0V (MAX809)

•Low 17μA Supply Current

•VCC Transient Immunity

•Small SOT±23 Package

•No External Components

•Wide Operating Temperature: ±40°C to 85°C

Typical Applications

•Computers

•Embedded Systems

•Battery Powered Equipment

•Critical μP Power Supply Monitoring

TYPICAL APPLICATION DIAGRAM

VCC

VCC

VCC

MAX809

PROCESSOR

RESET

RESET

INPUT

GND

GND

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SOT±23

(TO±236) CASE 318

PIN CONFIGURATION

(Top View)

GND	1
	3	VCC
RESET	2
(RESET)**
	SOT±23*
NOTE: *SOT±23 is equivalent to JEDEC (TO±236)

**RESET is for MAX809

**RESET is for MAX810

ORDERING INFORMATION

Device	Package	Shipping
MAX809xTR	SOT±23	3000 Tape/Reel
MAX810xTR	SOT±23	3000 Tape/Reel

NOTE: The ºxº denotes a suffix for VCC threshold ± see table below

Suffix	Reset VCC Threshold (V)
L	4.63
M	4.38
J*	4.00
T	3.08
S	2.93
R	2.63

NOTE: *J version is available for MAX809 only

Semiconductor Components Industries, LLC, 1999	1	Publication Order Number:
February, 2000 ± Rev. 2		MAX809/D

MAX809, MAX810

ABSOLUTE MAXIMUM RATINGS*

Symbol					Parameter	Value	Unit
	Supply Voltage (VCC to GND)					6.0	V
			RESET			±0.3 to (VCC + 0.3)	V
		RESET,
	Input Current, VCC					20	mA
	Output Current,				RESET	20	mA
				RESET,
	dV/dt (VCC)					100	V/μsec
PD	Power Dissipation (TA ≤ 70°C)						mW
		SOT±23 (derate 4mW/°C above +70°C)				230
TA	Operating Temperature Range					±40 to +85	°C
Tstg	Storage Temperature Range					±65 to +150	°C
Tsol	Lead Temperature (Soldering, 10 Seconds)					+260	°C

* Maximum Ratings are those values beyond which damage to the device may occur.

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MAX809, MAX810

ELECTRICAL CHARACTERISTICS (VCC = Full Range, TA = ±40°C to +85°C unless otherwise noted. typical values are at TA = +25C, VCC = 5V for L/M/J, 3.3V for T/S, 3.0V for R) (Note NO TAG)

Symbol				Characteristic	Min	Typ	Max	Unit
		VCC Range						V
		TA = 0°C to +70°C			1.0	Ð	5.5
		TA = ±40°C to +85°C			1.2	Ð	5.5
ICC		Supply Current						μA
		MAX8xxL/M/J: VCC < 5.5V			Ð	24	60
		MAX8xxR/S/T: VCC < 3.6V			Ð	17	50
VTH		Reset Threshold (Note NO TAG)						V
		MAX8xxL: TA = 25°C			4.56	4.63	4.70
		TA = ±40°C to +85°C			4.50	Ð	4.75
		MAX8xxM: TA = 25°C			4.31	4.38	4.45
		TA = ±40°C to +85°C			4.25	Ð	4.50
		MAX809J: TA = 25°C			3.93	4.00	4.06
		TA = ±40°C to +85°C			3.89	Ð	4.10
		MAX8xxT: TA = 25°C			3.04	3.08	3.11
		TA = ±40°C to +85°C			3.00	Ð	3.15
		MAX8xxS: TA = 25°C			2.89	2.93	2.96
		TA = ±40°C to +85°C			2.85	Ð	3.00
		MAX8xxR: TA = 25°C			2.59	2.63	2.66
		TA = ±40°C to +85°C			2.55	Ð	2.70
		Reset Threshold Temperature Coefficient			Ð	30	Ð	ppm/°C
		VCC to Reset Delay VCC = VTH to (VTH ± 100mV)			Ð	20	Ð	μsec
		Reset Active Timeout Period			140	240	560	msec
VOL				Output Voltage Low (MAX809)				V
		RESET
		MAX809R/S/T: VCC = VTH min, ISINK = 1.2mA			Ð	Ð	0.3
		MAX809L/M/J: VCC = VTH min, ISINK = 3.2mA			Ð	Ð	0.4
		VCC > 1.0V, ISINK = 50μA			Ð	Ð	0.3
VOH			Output Voltage High (MAX809)					V
		RESET
		MAX809R/S/T: VCC > VTH max, ISOURCE = 500μA			0.8 VCC	Ð	Ð
		MAX809L/M/J: VCC > VTH max, ISOURCE = 800μA			VCC ± 1.5	Ð	Ð
VOL		RESET Output Voltage Low (MAX810)			Ð	Ð	0.3	V
		MAX810R/S/T: VCC = VTH max, ISINK = 1.2mA
		MAX810L/M/J: VCC = VTH max, ISINK = 3.2mA			Ð	Ð	0.4
VOH		RESET Output Voltage High (MAX810)						V
		1.8 < VCC < VTH min, ISOURCE = 150μA			0.8 VCC	Ð	Ð

1. Production testing done at TA = 25°C, over temperature limits guaranteed by design.

PIN DESCRIPTION

Pin No.		Symbol				Description
1		GND			Ground
2			(MAX809)			output remains low while VCC is below the reset voltage threshold, and for 240msec (typ.)
		RESET			RESET
					after VCC rises above reset threshold
2	RESET (MAX810)				RESET output remains high while VCC is below the reset voltage threshold, and for 240msec (typ.)
					after VCC rises above reset threshold
3		VCC			Supply Voltage (typ.)

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