DS1211S ,Nonvolatile Controller X 8 ChipPIN DESCRIPTIONA, B, C - Address InputsCE - Chip Enable InputCE0 - CE7 - Chip Enable OutputsGND - G ..
DS1212 ,Nonvolatile Controller x 16 ChipPIN DESCRIPTION7 23CE13 CE2A, B, C, D - Address Inputs 8 22CE12 CE39 21CE11 CE4CE - Chip Enable10 2 ..
DS1213B ,SmartSocket 16k/64kPIN DESCRIPTIONCE - Conditioned Chip EnableV - Switched VCC CCGND - GroundAll pins pass through exc ..
DS1213C ,SmartSocket 256kFEATURES PIN ASSIGNMENT Accepts standard 32K x 8 CMOS static128 VCCRAMs2 27 Embedded lithium ..
DS1213-C ,SmartSocket 256kDS1213CSmartSocket 256kwww.dalsemi.com
DS1213D ,SmartSocket 256k/1MFEATURES PIN ASSIGNMENT Accepts standard 32K x 8 or 128K x 8132 VCCCMOS static RAMs2 31 Embed ..
DTA114TE ,Pre-biased TransistorsTHERMAL CHARACTERISTICSRating Symbol Value Unit*For additional information on our Pb−Free strategy ..
DTA114TET1 ,Bias Resistor TransistorELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted) (Continued)ACharacteristic Symbol Min ..
DTA114TET1G , Digital Transistors (BRT) R1 = 10 k, R2 = k
DTA114TK , DTA/DTC SERIES
DTA114TM , Built-In Bias Resistors Enable The Configuration of An Inverter Circuit Without Connecting External Input Resistors
DTA114TS , DTA/DTC SERIES
DS1211S
Nonvolatile Controller X 8 Chip
VCCI
VBAT2
VBAT1
VCCO
TOL
CE7
CE6
GND
CE0
CE1
CE2
CE3
CE4
CE5
VBAT1
VCCO
TOL
CE7
CE6
GND
VCCI
VBAT2
CE0
CE1
CE2
CE3
CE4
CE5
20-Pin DIP (300-mil)
See Mech. Drawings
Section
20-Pin SOIC (300-mil)
See Mech. Drawings
Section
FEATURESConverts full CMOS RAMs into nonvolatile
memoriesUnconditionally write protects when VCC is
out of toleranceAutomatically switches to battery when
power-fail occurs3 to 8 decoder provides control for up to eight
CMOS RAMsConsumes less than 100 nA of battery currentTests battery condition on power-upProvides for redundant batteriesPower-fail signal can be used to interrupt
processor on power failureOptional 5% or 10% power-fail detectionOptional 20-pin SOIC surface mount packageOptional industrial temperature range of
-40°C to +85°C
PIN ASSIGNMENT
PIN DESCRIPTIONA, B, C- Address Inputs- Chip Enable Input
CE0 - CE7- Chip Enable Outputs
GND- GroundVBAT1- + Battery 1
VBAT2- + Battery 2TOL- Power Supply Tolerance
VCCI- +5V SupplyVCC0- RAM Supply- Power-failNC- No Connection
DESCRIPTIONThe DS1211 Nonvolatile Controller x 8 Chip is a CMOS circuit which 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 writeprotection and the battery is switched on to supply RAMs with uninterrupted power. Special circuitry
uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery
consumption.
By combining the DS1211 nonvolatile controller/decoder chip and lithium batteries, nonvolatile RAM
operation can be achieved for up to eight CMOS memories.
DS1211
Nonvolatile Controller x 8 Chip
:
www.ic-phoenix.com
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