參數(shù)資料
型號(hào): DS1211
廠(chǎng)商: MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi): 微控制器/微處理器
英文描述: Nonvolatile Controller x 8 Chip(非易失性控制器x 8 芯片)
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PDIP20
封裝: 0.300 INCH, DIP-20
文件頁(yè)數(shù): 1/1頁(yè)
文件大?。?/td> 21K
代理商: DS1211
DS1211
Nonvolatile Controller x 8 Chip
DS1211
021798 1/1
FEATURES
Converts full CMOS RAMs into nonvolatile memories
Unconditionally write protects when V
CC
is out of
tolerance
Automatically switches to battery when power fail
occurs
3 to 8 decoder provides control for up to eight 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 20-pin SOIC surface mount package
Optional industrial temperature range of
-40
°
C to +85
°
C
PIN ASSIGNMENT
8
9
10
VCCI
VBAT2
CE
CE0
CE1
CE2
CE3
NC
CE4
CE5
VBAT1
VCCO
TOL
PF
CE7
CE6
C
B
A
GND
VCCO
TOL
PF
CE7
CE6
C
B
A
GND
VBAT1
VBAT2
CE
CE0
CE1
CE2
CE3
NC
CE4
CE5
VCCI
20-Pin DIP (300 MIL)
See Mech. Drawings
Section
20-Pin SOIC (300 MIL)
See Mech. Drawings
Section
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
9
17
18
19
20
1
2
3
4
5
6
7
11
12
13
14
15
16
17
18
19
20
PIN DESCRIPTION
A, B, C
CE
CE0 - CE7
GND
V
BAT1
V
BAT2
TOL
V
CCI
V
CC0
PF
NC
– Address Inputs
– Chip Enable Input
– Chip Enable Outputs
– Ground
– + Battery 1
– + Battery 2
– Power Supply Tolerance
– +5V Supply
– RAM Supply
– Power Fail
– No Connection
DESCRIPTION
The DS1211 Nonvolatile Controller x 8 Chip is a CMOS
circuit which solves the application problem of convert-
ing 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 RAMs with uninterrupted pow-
er. Special circuitry uses a low-leakage CMOS process
which affords precise voltage detection at extremely low
battery consumption.
By combining the DS1211 nonvolatile controller/decod-
er chip and lithium batteries, nonvolatile RAM operation
can be achieved for up to eight CMOS memories.
See the data sheet for the DS1212 Nonvolatile Control-
ler x 16 Chip for electrical specifications and operation.
相關(guān)PDF資料
PDF描述
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DS1216B SmartWatch/RAM 16K/64K(16K/64K位帶實(shí)時(shí)時(shí)鐘的掉電保護(hù)RAM插座)
DS1216C SmartWatch/RAM 16K/65K(16K/65K位帶實(shí)時(shí)時(shí)鐘的掉電保護(hù)RAM插座)
DS1216D(中文) Using the Dallas Phantom Real Time Clocks(256K/1M位帶實(shí)時(shí)時(shí)鐘的帶掉電保護(hù)SRAM插座)
DS1216D Using the Dallas Phantom Real Time Clocks(256K/1M位帶實(shí)時(shí)時(shí)鐘的帶掉電保護(hù)SRAM插座)
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