|
|
Part: MAX6328XR25-T
Category:
Power Management
-> Supervisory Circuits
-> Microprocessor Supervisors
-> 3-Pin/5-Pin
Description: Ultra-low-power Microprocessor Supervisory Circuit (reset Output Active-low, Open-drain). Reset Threshold (typ) 2.500V. Order Increment 10k
Company: Maxim Integrated Products
Datasheet: Download MAX6328XR25-T datasheet File size : 384 kB
Request For quote: Find where to buy MAX6328XR25-T
Datasheet text preview:
19-1294; Rev 3; 1/00
3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
General Description
The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ MAX6348 microprocessor (µP) supervisory circuits monitor the power supplies in µP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 2.5V, 3V, 3.3V, and 5V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 100ms after VCC has risen above the reset threshold. The only difference between the devices is their output. T h e MAX6326/MAX6346 (push-pull) and MAX6328/ MAX6348 (open-drain) have an active-low reset output. The MAX6327/MAX6347 have an active-high push-pull reset output. All of these parts are guaranteed to be in the correct state for VCC down to 1V. The reset comparator is designed to ignore fast transients on VCC. Reset t h r e s h o l d s are factory-trimmable between 2.2V and 4.63V, in approximately 100mV increments. Twenty-one standard versions are available. Contact the factory for availability of nonstandard versions. Ultra-low supply currents (1µA max for the MAX6326/ MAX6327/MAX6328) make these parts ideal for use in portable equipment. All six devices are available in space-saving SOT23 and SC70 packages.
Features
o Ultra-Low 1µA (max) Supply Current (MAX6326/MAX6327/MAX6328) o Precision Monitoring of 2.5V, 3V, 3.3V, and 5V Power-Supply Voltages o Reset Thresholds Available from 2.2V to 4.63V o Fully Specified Over Temperature o 100ms (min) Power-On Reset Pulse Width o Low Cost o Available in Three Versions: Push-Pull RESET, Push-Pull RESET, and Open-Drain RESET o Power-Supply Transient Immunity o No External Components o 3-Pin SC70/SOT23 Packages o Pin Compatible with MAX803/MAX809/MAX810
MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348
Ordering Information
PART MAX6326XR_ _-T MAX6326UR_ _-T MAX6327XR_ _-T MAX6327UR_ _-T MAX6328XR_ _-T MAX6328UR_ _-T MAX6346XR_ _-T MAX6346UR_ _-T MAX6347XR_ _-T MAX6347UR_ _-T MAX6348XR_ _-T MAX6348UR_ _-T TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3
Applications
Computers Controllers Critical µP and µC Power Monitoring Intelligent Instruments Automotive Portable/Battery-Powered Equipment
Pin Configuration
TOP VIEW
GND 1
MAX6326 MAX6327 MAX6328 MAX6346 MAX6347 MAX6348
(RESET) RESET 2
3
VCC
The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ MAX6348 are available in factory-set VCC reset thresholds from 2.2V to 4.63V, in approximately 0.1V increments. Choose the desired reset-threshold suffix from Table 1 and insert it in the blank spaces following "R." There are 21 standard versions with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). Required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only. Selector Guide appears at end of data sheet.
SOT23-3/SC70-3
( ) ARE FOR THE MAX6327/MAX6347.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND) VCC .........-0.3V to +6V RESET, RESET (push-pull) .......-0.3V to (VCC + 0.3V) RESET (open drain)........-0.3V to +6V Input Current (VCC) ....20mA Output Current (RESET, RESET)........20mA Rate of Rise (VCC) ..100V/µs Continuous Power Dissipation (TA = +70°C) 3-Pin SC70 (derate 2.7mW/°C above +70°C) ......174mW 3-Pin SOT23 (derate 4mW/°C above +70°C).......320mW Operating Temperature Range ...-40°C to +85°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10s) .........+300°C
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
(VCC = full range, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 3V.) (Note 1) PARAMETER VCC Range SYMBOL CONDITIONS TA = 0°C to +70°C TA = -40°C to +85°C ICC MAX632_ only, VCC = 3.0V for VTH 2.93V, VCC = 3.2V for VTH > 2.93V, no load VCC = 5.5V, no load TA = +25°C Reset Threshold VTH Table 1 TA = -40°C to +85°C Reset Threshold Tempco VCC to Reset Delay Reset Active Timeout Period RESET Output Voltage (MAX6326/MAX6328/ MAX6346/MAX6348) RESET Output Voltage (MAX6326/MAX6346) ISINK = 1.6mA, VCC > 2.1V, reset asserted VOL ISINK = 100µA, VCC 1.2V, reset asserted ISOURCE = 500µA, VCC = 3.2V, MAX6326 only VOH ISOURCE = 800µA, VCC = 4.5V, VTH 4.38V ISOURCE = 800µA, VCC = VTH(MAX), VTH 4.5V VOH RESET Output Voltage (MAX6327/MAX6347) VOL ISOURCE = 500µA, VCC 2.1V, reset asserted ISOURCE = 50µA, VCC 1.2V, reset asserted ISINK = 1.2mA, VCC 3.2V, reset not asserted, MAX6327 only ISINK = 3.2mA, VCC 4.5V, reset not asserted, VTH 4.38V ISINK = 3.2mA, VCC = VTH(MAX), VTH 4.5V RESET Threshold Hysteresis Open-Drain RESET Output Leakage Current Note 1: Overtemperature limits are guaranteed by design and not production tested. MAX6326/MAX6327/MAX6328 MAX6346/MAX6347/MAX6348 6.3 9.5 0.1 0.8 · VCC 0.8 · VCC 0.8 · VCC 0.8 · VCC 0.8 · VCC 0.3 0.4 0.4 mV µA V V VTH/°C VCC = VTH to (VTH - 100mV) 100 VTH 1.5% VTH 2.5% MIN 1.0 1.2 0.5 1.0 VTH VTH 40 20 185 280 0.3 V 0.4 TYP MAX 5.5 5.5 1.0 1.75 VTH + 1.5% VTH + 2.5% UNITS V
Supply Current
µA
V
ppm/°C µs ms
2
_______________________________________________________________________________________
3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
0.9 0.8 SUPPLY CURRENT (µA) RESET DELAY (µs) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 -20 0 20 40 60 80 TEMPERATURE (°C) VCC = 1.2V 0 -40 -20 0 50 VOD = 100mV VOD = 200mV 20 40 60 80 TEMPERATURE (°C) VCC = 3.3V VCC = 5V 150
MAX6326-01
MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348
POWER-DOWN RESET DELAY vs. TEMPERATURE
200
MAX6326-02
1.0
100
VOD = 20mV VOD = 10mV
POWER-UP RESET TIMEOUT vs. TEMPERATURE
MAX6326-03
MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE (SC70)
MAXIMUM TRANSIENT DURATION (µs)
MAX6326-04
210 POWER-UP RESET TIMEOUT (ms) 200 190 180 170 160 150 140 130 -40 -20 0 20 40 60 80 TEMPERATURE (°C)
500
400
300
200
100
0 1 10 100 1000 RESET THRESHOLD OVERDRIVE, VTH - VCC (mV)
______________________________________________________________Pin Description
PIN PIN MAX6327 MAX6347 1 NAME GND Ground Active-Low Reset Output. RESET remains low while VCC is below the reset threshold and for at least 100ms after VCC rises above the reset threshold. RESET is open-drain on the MAX6328/MAX6348 and push-pull on the MAX6326/MAX6346. Active-High Reset Output. RESET remains high while VCC is below the reset threshold and for at least 100ms after VCC rises above the reset threshold. Supply Voltage FUNCTION MAX6326/MAX6346 MAX6328/MAX6348 1
2
--
RESET
-- 3
2 3
RESET VCC
_______________________________________________________________________________________
3
Others parts begin by ma
|
|
|
