參數(shù)資料
型號: DS1212Q
廠商: Maxim Integrated
文件頁數(shù): 1/7頁
文件大?。?/td> 0K
描述: IC CONTROLLER NV 16-CHIP 28-PLCC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 37
控制器類型: 非易失性 RAM
電源電壓: 4.75 V ~ 5.5 V
工作溫度: 0°C ~ 70°C
封裝/外殼: 28-LCC(J 形引線)
供應(yīng)商設(shè)備封裝: 28-PLCC(11.51x11.51)
包裝: 管件
1 of 7
111899
FEATURES
Converts full CMOS RAM into nonvolatile
memory
Unconditionally write protects when VCC 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
PIN DESCRIPTION
A, B, C, D
- Address Inputs
CE
- Chip Enable
CE0
- CE15
- Chip Enable Outputs
GND
- Ground
VBAT1
- + Battery 1
VBAT2
- + Battery 2
TOL
- Power Supply Tolerance
VCCI
- +5V Supply
VCCO
- RAM Supply
PF
- Power Fail
PIN ASSIGNMENT
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 process that affords precise voltage detection at extremely low battery
consumption.
DS1212
Nonvolatile Controller x 16 Chip
www.dalsemi.com
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28-Pin DIP (600-mil)
See Mech. Drawings Section
28-Pin PLCC
See Mech. Drawings Section
CE15
CE14
CE13
CE12
CE11
D
C
PF
TOL
VC
C
O
VB
AT1
VC
C
I
VB
AT2
CE
25
24
23
22
21
20
19
5
6
7
8
9
10
11
4
3
2
1
28
27
26
12
13
14
15
16
17
18
CE0
CE1
CE2
CE3
CE4
CE5
CE6
B
A
GND
CE
10
CE
9
CE
8
CE
7
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