參數(shù)資料
型號: DS1212
廠商: DALLAS SEMICONDUCTOR
元件分類: 電源管理
英文描述: Nonvolatile Controller x 16 Chip(非易失性控制器x 16 芯片)
中文描述: 3-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP28
封裝: 0.600 INCH, DIP-28
文件頁數(shù): 1/6頁
文件大?。?/td> 77K
代理商: DS1212
DS1212
Nonvolatile Controller x 16 Chip
DS1212
021798 1/6
FEATURES
Converts full CMOS RAM into nonvolatile memory
Unconditionally write protects when V
CC
is out of
tolerance
Automatically switches to battery when power fail
occurs
4 to 16 decoder provides control for up to 16 CMOS
RAMs
Consumes less than 100 nA of battery current
Tests battery condition on power-up
Provides for redundant batteries
Power fail signal can be used to interrupt processor on
power failure
Optional 5% or 10% power fail detection
Optional 28-pin PLCC surface mount package
Optional industrial temperature range of
-40
°
C to +85
°
C
DESCRIPTION
The DS1212 Nonvolatile Controller x16 Chip is a CMOS
circuit that solves the application problem of converting
CMOS RAMs into nonvolatile memories. Incoming
power is monitored for an out-of-tolerance condition.
When such a condition is detected, the chip enables are
inhibited to accomplish write protection and the battery
is switched on to supply the RAMs with uninterrupted
power. Special circuitry uses a low-leakage CMOS pro-
cess that affords precise voltage detection at extremely
low battery consumption.
By combining the DS1212 Nonvolatile Controller chip
and lithium batteries, nonvolatile RAM operation can be
achieved for up to 16 CMOS memories.
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
VBAT1
VCCO
TOL
PF
CE15
CE14
CE13
CE12
CE11
D
C
B
A
GND
VCCI
VBAT2
CE
CE0
CE1
CE2
CE3
CE4
CE5
CE6
CE7
CE8
CE9
CE10
28-Pin DIP (600 MIL)
See Mech. Drawings Section
4
3
2
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
P
T
V
V
V
V
C
28-Pin PLCC
See Mech. Drawings Section
CE0
CE1
CE2
CE3
CE4
CE5
CE6
CE15
CE14
CE13
CE12
CE11
D
C
B
A
G
C
C
C
C
PIN DESCRIPTION
A, B, C, D
CE
CE0-CE15
GND
V
BAT1
V
BAT2
TOL
V
CCI
V
CCO
PF
– Address Inputs
– Chip Enable
– Chip Enable Outputs
– Ground
– + Battery 1
– + Battery 2
– Power Supply Tolerance
– +5V Supply
– RAM Supply
– Power Fail
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
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DS1212-N 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Nonvolatile Controller
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