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DS1238

Description
Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDIP16, 0.300 INCH, DIP-16
CategoryPower/power management    The power supply circuit   
File Size215KB,14 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

DS1238 Overview

Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDIP16, 0.300 INCH, DIP-16

DS1238 Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeDIP
package instruction0.300 INCH, DIP-16
Contacts16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeR-PDIP-T16
JESD-609 codee0
length19.175 mm
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Encapsulate equivalent codeDIP16,.3
Package shapeRECTANGULAR
Package formIN-LINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply5 V
Certification statusNot Qualified
Maximum seat height4.572 mm
Maximum supply current (Isup)4 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.5 V
Nominal supply voltage (Vsup)5 V
surface mountNO
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.62 mm
DS1238
MicroManager
www.dalsemi.com
FEATURES
Holds microprocessor in check during power
transients
Halts and restarts an out-of-control
microprocessor
Warns microprocessor of an impending power
failure
Converts CMOS SRAM into nonvolatile
memory
Unconditionally write-protects memory when
power supply is out of tolerance
Delays write protection until completion of
the current memory cycle
Consumes less than 200 nA of battery current
Controls external power switch for high
current applications
Debounces pushbutton reset
Accurate 10% power supply monitoring
Optional 5% power supply monitoring
designated DS1238-5
Provides orderly shutdown in microprocessor
applications
Pin-for-pin compatible with MAX691
Standard 16-pin DIP or space-saving 16-pin
SOIC
Optional industrial temperature range -40°C
to +85°C
PIN ASSIGNMENT
VBAT
VCCO
VCC
GND
PF
RVT
OSCIN
OSCSEL
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RST
RST
WDS
CEI
CEO
ST
NMI
IN
VBAT
VCCO
VCC
GND
PF
RVT
OSCIN
OSCSEL
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RST
RST
WDS
CEI
CEO
ST
NMI
IN
16-Pin DIP (300-mil)
See Mech. Drawings Section
16-Pin SOIC (300-mil)
See Mech. Drawings Section
PIN DESCRIPTION
V
BAT
V
CCO
V
CC
GND
PF
RVT
OSCIN
OSCSEL
IN
NMI
ST
CEO
CEI
WDS
RST
RST
- +3-Volt Battery Input
- Switched SRAM Supply Output
- +5-Volt Power Supply Input
- Ground
- Power-Fail
- Reset Voltage Threshold
- Oscillator In
- Oscillator Select
- Early Warning Input
- Non-Maskable Interrupt
- Strobe Input
- Chip Enable Output
- Chip Enable Input
- Watchdog Status
- Reset Output (active low)
- Reset Output (active high)
DESCRIPTION
The DS1238 MicroManager provides all the necessary functions for power supply monitoring, reset
control, and memory backup in microprocessor-based systems. A precise internal voltage reference and
comparator circuit monitor power supply status. When an out-of-tolerance condition occurs, the
microprocessor reset and power-fail outputs are forced active, and static RAM control unconditionally
write protects external memory. The DS1238 also provides early warning detection of a user-defined
threshold by driving a non-maskable interrupt. External reset control is provided by a pushbutton reset
1 of 14
111899

DS1238 Related Products

DS1238 DS1238AS-5+ DS1238S-10+ DS1238S-5+ DS1238AS-10/T&R DS1238S-5/T&R; DS1238AS-10/T&R; DS1238S+T&R; DS1238S-5+T&R;
Description Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDIP16, 0.300 INCH, DIP-16 IC micro manager 5% 16-soic IC microman W/fresh 10% 16-soic IC microman W/fresh 5% 16-soic IC micromanager 10% 16-soic IC MICROMAN W/FRESH 5% 16-SOIC IC MICROMANAGER 10% 16-SOIC IC MICROMAN W/FRESH 10% 16-SOIC IC MICROMAN W/FRESH 5% 16-SOIC
Is it Rohs certified? incompatible conform to conform to conform to incompatible - - - -
Maker Maxim Maxim Maxim Maxim Maxim - - - -
Parts packaging code DIP SOIC SOIC SOIC SOIC - - - -
package instruction 0.300 INCH, DIP-16 SOP, SOP, SOP16,.4 0.300 INCH, SOIC-16 SOP, - - - -
Contacts 16 16 16 16 16 - - - -
Reach Compliance Code not_compliant compli compli unknown compliant - - - -
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 - - - -
Adjustable threshold NO NO NO NO NO - - - -
Analog Integrated Circuits - Other Types POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT - - - -
JESD-30 code R-PDIP-T16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 - - - -
JESD-609 code e0 e3 e3 e3 e0 - - - -
length 19.175 mm 10.3 mm 10.3 mm 10.3 mm 10.3 mm - - - -
Number of channels 1 1 2 1 1 - - - -
Number of functions 1 1 1 1 1 - - - -
Number of terminals 16 16 16 16 16 - - - -
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C - - - -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - - - -
encapsulated code DIP SOP SOP SOP SOP - - - -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR - - - -
Package form IN-LINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE - - - -
Peak Reflow Temperature (Celsius) NOT SPECIFIED 260 260 260 245 - - - -
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified - - - -
Maximum seat height 4.572 mm 2.65 mm 2.65 mm 2.65 mm 2.65 mm - - - -
Nominal supply voltage (Vsup) 5 V 5 V 5 V 5 V 5 V - - - -
surface mount NO YES YES YES YES - - - -
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL - - - -
Terminal surface Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) TIN LEAD - - - -
Terminal form THROUGH-HOLE GULL WING GULL WING GULL WING GULL WING - - - -
Terminal pitch 2.54 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm - - - -
Terminal location DUAL DUAL DUAL DUAL DUAL - - - -
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED - - - -
width 7.62 mm 7.5 mm 7.5 mm 7.5 mm 7.5 mm - - - -
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