19-0154; Rev 1; 3/96
Nonvolatile RAM Controller
_______________General Description
The MXD1210 nonvolatile RAM controller is a very low-
power CMOS circuit that converts standard (volatile)
CMOS RAM into nonvolatile memory. It also continually
monitors the power supply to provide RAM write protec-
tion when power to the RAM is in a marginal (out-of-
tolerance) condition. When the power supply begins to
fail, the RAM is write protected, and the device switch-
es to battery-backup mode.
____________________________Features
o
Battery Backup
o
Memory Write Protection
o
230碌A(chǔ) Operating-Mode Quiescent Current
o
2nA Backup-Mode Quiescent Current
o
Battery Freshness Seal
o
Optional Redundant Battery
o
Low Forward-Voltage Drop on V
CC
Supply Switch
o
5% or 10% Power-Fail Detection Options
o
Tests Battery Condition During Power-Up
o
8-Pin SO Available
MXD1210
Applications
碌P Systems
Computers
Embedded Systems
_________________Pin Configurations
______________Ordering Information
PART
TOP VIEW
MXD1210CPA
MXD1210CSA
MXD1210CWE
MXD1210C/D
MXD1210EPA
MXD1210ESA
MXD1210EWE
MXD1210MJA
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-55擄C to +125擄C
PIN-PACKAGE
8 Plastic DIP
8 SO
16 Wide SO
Dice*
8 Plastic DIP
8 SO
16 Wide SO
8 CERDIP
V
CCO
1
VBATT1 2
TOL 3
GND 4
8
7
V
CCI
VBATT2
CEO
CE
MXD1210
6
5
*Contact factory for dice specifications.
DIP/SO
__________Typical Operating Circuit
V
CCI
V
CCO
VBATT1
VBATT2
V
CC
CMOS
RAM
6
3
CE
N.C. 1
V
CCO
2
N.C. 3
VBATT1 4
N.C. 5
TOL 6
N.C. 7
GND 8
16 N.C.
15 V
CCI
14 N.C.
+5V
8
1
2
MXD1210
7
CE
5
FROM
DECODER
4
MXD1210
13 VBATT2
12 N.C.
11 CEO
10 N.C.
9 CE
Wide SO
GND
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800