DS1239-10 Maxim Integrated Products, DS1239-10 Datasheet
DS1239-10
Manufacturer Part Number
DS1239-10
Description
IC MICROMAN W/FRESH 10% 16-DIP
Manufacturer
Maxim Integrated Products
Series
MicroManagerr
Type
Battery Backup Circuitr
Datasheet
1.DS1239S-5.pdf
(4 pages)
Specifications of DS1239-10
Number Of Voltages Monitored
1
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
25 ms Minimum
Voltage - Threshold
4.37V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS1239-10
Manufacturer:
DALLAS
Quantity:
20 000
FEATURES
DESCRIPTION
The DS1239 MicroManager provides all the necessary functions for power supply control and
monitoring, reset control, and memory backup in microprocessor-based systems. Using the DS1239, an
AC power switch is no longer required for microprocessor-based systems. A keyboard control system for
power supply start up and shutdown is provided through the use of the Power Supply Control Input and
Output. In other respects, the DS1239 is functionally identical to a DS1236 in the NMOS mode. For a
complete description of the other DS1239 features, refer to the DS1236 data sheet. Pin-out of the
www.dalsemi.com
Provides necessary control for start up and
shutdown of power supply from keyboard
Holds microprocessor in check during power
transients
Halts and restarts an out-of-control
microprocessor
Monitors push button for external override
Warns microprocessor of an impending power
failure
Converts CMOS SRAM into nonvolatile
memory
Unconditionally write-protects memory when
power supply is out of tolerance
Consumes less than 100 nA of battery current
Controls external power switch for high
current applications
Accurate 10% power supply monitoring
Optional 5% power supply monitoring
designated DS1239-5
Provides orderly shutdown in nonvolatile
microprocessor applications
Supplies necessary control for low-power
“stop mode” in battery operate hand-held
applications
Standard 16-pin DIP or space-saving 16-pin
SOIC
Optional industrial temperature range -40 C
to +85 C
1 of 4
WC/SC
VCCO
VBAT
GND
PIN ASSIGNMENT
VCC
PIN DESCRIPTION
V
V
V
GND
PF
WC/
IN
PSO
ST
PF
PSI
NMI
CEO
CEI
PBRST
RST
PSI
PF
PF
DS1239 16-Pin DIP (300-mil)
BAT
CCO
CC
See Mech. Drawings Section
SC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
- +3 Volt Battery Input
- Switched SRAM Supply Output
- +5 Volt Power Supply Input
- Ground
- Power Fail (Active High)
- Power Fail (Active Low)
- Wake-Up Control (Sleep)
- Power Supply Control Input
- Early Warning Input
- Non-Maskable Interrupt
- Strobe Input
- Chip Enable Output
- Chip Enable Input
- Pushbutton Reset Input
- Reset Output (Active low)
- Power Supply Control Outputs
MicroManager Chip
9
PSO
RST
PBRST
CEI
CEO
ST
NMI
IN
WC/SC
VCCO
VBAT
GND
VCC
DS1239 16-Pin SOIC (300-mil)
PSI
PF
PF
See Mech. Drawings Section
1
2
3
4
5
6
7
8
DS1239
16
15
14
13
12
11
10
9
111899
PSO
RST
PBRST
CEI
CEO
ST
NMI
IN
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DS1239-10 Summary of contents
Page 1
... Power Supply Control Input and Output. In other respects, the DS1239 is functionally identical to a DS1236 in the NMOS mode. For a complete description of the other DS1239 features, refer to the DS1236 data sheet. Pin-out of the ...
Page 2
... DS1239 is identical to the DS1236 with two exceptions. The RC and RST pins have been replaced with and PSO, respectively. Other pins and functions operate exactly as the DS1236 in NMOS mode. PSI POWER SUPPLY CONTROL The DS1239 facilitates the power-up and power-down sequencing of a main power supply from a keyboard or pushbutton ...
Page 3
... Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. These specifications reflect the power supply control feature of the DS1239. For complete electrical specifications, refer to the DS1236 data sheet. ...
Page 4
... PSO will typically source 1 1.5V with SYMBOL MIN TYP I 3 PSI I 10 PSO ( SYMBOL MIN TYP t PSI t PST t PSO t 200 PSP . BAT = 0V 3V. CC BAT DS1239 = 4.5V to 5.5V) CC MAX UNITS NOTES µ 4.5V to 5.5V) CC MAX UNITS NOTES 200 100 ns 500 ms 2 ...