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MAX6366PKA44-T PDF Datasheet浏览和下载

型号:
MAX6366PKA44-T
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内容描述:
SOT23封装,低功耗微处理器监控电路,带有备用电池和片选控制 [SOT23, Low-Power レP Supervisory Circuits with Battery Backup and Chip-Enable Gating]
文件大小:
221 K
文件页数:
15 Pages
品牌Logo:
品牌名称:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]



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19-1658; Rev 1; 6/01
SOT23, Low-Power µP Supervisory Circuits
with Battery Backup and Chip-Enable Gating
General Description
The MAX6365–MAX6368 supervisory circuits simplify
power-supply monitoring, battery-backup control func-
tions, and memory write protection in microprocessor
(µP) systems. The circuits significantly improve the size,
accuracy, and reliability of modern systems with an ultra-
small integrated solution.
These devices perform four basic system functions:
1) Provide a µP reset output during V
CC
supply power-
up, power-down, and brownout conditions.
2) Internally control V
CC
to backup-battery switching to
maintain data or low-power operation for CMOS
RAM, CMOS µPs, real-time clocks, and other digital
logic when the main supply fails.
3) Provide memory write protection through internal
chip-enable gating during supply or processor faults.
4) Include one of the following options: a manual reset
input (MAX6365), a watchdog timer function
(MAX6366), a battery-on output (MAX6367), or an
auxiliary user-adjustable reset input (MAX6368).
The MAX6365–MAX6368 operate from V
CC
supply volt-
ages as low as 1.2V. The factory preset reset threshold
voltages range from 2.32V to 4.63V (see
Ordering
Information).
In addition, each part is offered in three
reset output versions: push-pull active low, open-drain
active low, or open-drain active high (see
Selector
Guide).
The MAX6365–MAX6368 are available in minia-
ture 8-pin SOT23 packages.
Features
o
Low +1.2V Operating Supply Voltage (V
CC
or V
BATT
)
o
Precision Monitoring of +5.0V, +3.3V, +3.0V, and
+2.5V Power-Supply Voltages
o
On-Board Gating of Chip-Enable Signals, 1.5ns
Propagation Delay
o
Debounced Manual Reset Input (MAX6365)
o
Watchdog Timer, 1.6s Timeout (MAX6366)
o
Battery-On Output Indicator (MAX6367)
o
Auxiliary User-Adjustable RESET IN (MAX6368)
o
Low 10µA Quiescent Supply Current
o
Three Available Output Structures
Push-Pull
RESET
Open-Drain
RESET
Open-Drain RESET
o
RESET/RESET Valid Down to 1.2V Guaranteed
(V
CC
or V
BATT
)
o
Power-Supply Transient Immunity
o
150ms min Reset Timeout Period
o
Miniature 8-Pin SOT23 Package
MAX6365–MAX6368
Ordering Information
PART*
MA X6 36 5
LKA_ _-T
MAX6365PKA_ _-T
MAX6365HKA_ _-T
MA X6 36 6
LKA_ _-T
MAX6366PKA_ _-T
MAX6366HKA_ _-T
MA X6 36 7
LKA_ _-T
MAX6367PKA_ _-T
MAX6367HKA_ _-T
MA X6 36 8
LKA_ _-T
MAX6368PKA_ _-T
MAX6368HKA_ _-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
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
Applications
Critical µP/µC Power
Monitoring
Fax Machines
Industrial Control
Computers/Controllers
Portable/Battery-
Powered Equipment
Set-Top Boxes
POS Equipment
Pin Configurations
TOP VIEW
RESET, RESET
CE IN
GND
1
2
8
7
CE OUT
BATT
OUT
V
CC
MAX6365
3
6
5
MR
4
*These parts offer a choice of reset threshold voltages. From the
Reset Threshold Ranges table, insert the desired threshold volt-
age code in the blank to complete the part number. SOT parts
come in tape-and-reel only and must be ordered in 2500-piece
increments. See Device Marking Codes for a complete parts list,
including SOT top marks and standard threshold versions. See
Selector Guide for a listing of device features.
SOT23
Pin Configurations continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.