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參數(shù)資料
| 型號： | DS1227S |
| 英文描述： | KickStarter Chip |
| 中文描述： | Kickstarter的芯片 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 156K |
| 代理商： | DS1227S |
DS1227
KickStarter Chip
DS1227
022698 1/20
FEATURES
Provides step-up regulation and microenergy
management for battery-operated systems
Converts +3V to +6V DC input power source to +5V
DC out for system power
“Kickstarts” system power upon detection of external
stimuli:
- Clock/calendar alarm
- Sensor trip; such as from a photo diode
- Incoming activity to a serial port
- Any low-level signal transition
Shuts down microcontroller power under software
control when operation complete
Provides 3 auxiliary power outputs for independent
powering of system functions
Allows design of “power on demand” systems
Insures maximum life of main power source
Ideally suited for DS5000-based systems
Available in 20-pin DIP or SOIC packages
Operating temperature range of –40
°
C to +85
°
C
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
9
17
18
19
20
VCCO2
VCCO3
VCCO1
VDCO
VDCI
GND
VCCO4
MODE4
SENSE
OSCEXT
RXIN
RXOUT
20-Pin DIP (300 Mil)
See Mech. Drawing - Sect. 16, Pg. 1
PWRON
ON/OFF3
OFF1
ON2/OFF2
INT/ACK
BOOST
ON1
ON4
8
9
10
1
2
3
4
5
6
7
11
12
13
14
15
16
17
18
19
20
20-Pin SOIC (300 Mil)
See Mech. Drawing - Sect. 16, Pg. 6
VCCO4
MODE4
SENSE
INT/ACK
OSCEXT
BOOST
ON1
ON4
RXIN
RXOUT
VCCO2
VCCO3
VCCO1
PWRON
VDCO
VDCI
GND
ON/OFF3
OFF1
ON2/OFF2
ORDERING INFORMATION
DS1227:
20-Pin DIP
DS1227S:
20-Pin SOIC
DESCRIPTION
The DS1227 Kickstarter is a unique CMOS circuit which
combines power conversion and microenergy manage-
ment functions for battery operated systems. Using its
integral DC-DC converter, the DS1227 supplies +5V on
demand from either a 3– or 6–volt battery input. The pri-
mary +5V output, typically tied to the microcontroller’s
V
CC
pin, is “kickstarted” on in response to any one of
several possible momentary, external signal transitions.
Two auxiliary +5V power supply outputs can then be in-
dependently enabled or disabled under software con-
trol. When the primary power supply output is disabled,
also under software control, the auxiliary power supply
outputs remain in the state selected. In this manner, in-
dividual portions of the system can be powered only
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