- Series: -
- Brand: Dallas
- Package / Case: DIP
- Packaging: Tube
- Part Status: Obsolete
- Controller Type: Smartsocket SRAM
- Voltage - Supply: 4.75 V ~ 5.5 V
- Operating Temperature: 0°C ~ 70°C
- Supplier Device Package: 28-PDIP
5.0 out of 5 stars
Total products: 2399987
Total sales: 5170563
Average lead time: 38.93 Hour
Delivery times (Express): 71782
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Less than 1 year
Very satisfied with
DS1213C F65545/B2 DS1286
Spain Las Rozas de Madrid
Length of registration:9 years
bought UT SOURCE
FZ1600R17HP4_B21 QM150HY-H TM130RZ-M MG75Q2YS40 DS1213C TC5020BP DSD625-25D DSI17-12A DS17-12A TEN4-2413 STTH6112TV2 QM100DY-H TLP626 HPR100 AD8511ARUZ SSM2165-2S ST7538P HT6264-70 HD64F3672FXV NE83C92A TDA2614 AD7893ARZ-5 QM100E2Y-H
J.A. van der Horst
Length of registration:2 years
M514221A-4 UPD42101C-3 NE564N M514400D-60Z SN74LS08N 2SC945-Y 74FCT543TSO SN74AC16245DL CY74FCT543CTSOCT XC95288XL-10TQ144I MSM514100D-60ZS MC68030FE25C PAL16L8ACN PAL16R4ACN 74LS125A HM514100CZ8 DS1100Z-25 74F646SPC SN74F245N DS1213C 74F04PC SN74LS174N 74F86PC 74LS74AN SN74F163AN D42101C-3 74HCT244N
Length of registration:7 years
DS17-08A DSI17-12A BUF420AI M811P A50L-0001-0109 DS1202S DS1210S PALCE16V8Q-25PC/4 TSC8705CJ200 DAC1006LCN VUO190-16NO7 MJ10009 IXTH24N50 (5pcs) DIP Ceramic Resistor 5% 10W 47Ω(47R) HCPL-V454-020 FA5310S-TE1 2SK1413 UC3844AD1 7MBR30SA060-50 DS1213C 2SA1302 2SC3281 VN820 2SK1359 ESM2878 2SK1120 D7001C
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The DS1213C SmartSocket is a 28-pin, 600 mil DIP socket with a built-in CMOS controller circuit and an embedded lithium energy source. It accepts a 32K x 8 JEDEC bytewide CMOS static RAM. When the socket is mated with a CMOS RAM, it provides a complete solution o problems associated with memory volatility. The SmartSocket monitors incoming VCC for an out-of- tolerance condition. When such a condition occurs, the internal lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption.
Using the SmartSocket saves printed circuit board space since the SRAM/SmartSocket combination occupies no more area than the memory alone. The SmartSocket uses only Pins 20 and 28 for RAM control. All other pins are passed straight through. See the DS1213B SmartSocket data sheet for technical details.
The DS1213C SmartSocket is a 28-pin, 600mil dual in-line package socket with a built-in Complementary Metal Oxide Semiconductor (CMOS) controller circuit and an embedded lithium energy source which is manufactured by Maxim integrated company. It allows a 32k x 8 JEDEC byte wide CMOS static RAM. When the socket DSC1213C is mated with a CMOS RAM, it provides a comprehensive solution of problems associated with memory volatility. This device monitors the incoming Vcc for an out-of-tolerance condition. When a condition like that happens, the internal lithium energy source is automatically going to the switching ON condition and write protection is unconditionally enabled to avoid the corruption of data.
DS1213C Pin Configuration
When we are using the DSC1213C SmartSocket, it saves the space in the printed circuit board since the SRAM/SmartSocket combination inhabits no more area than the memory alone. The DSC123C SmartSocket takes only Pins 20 and 28 for the controlling of RAM. All the other remaining pins are passed straight through.
Some of the key features of this device are given below.
· Standard 32k x 8 CMOS static RAMs are accepted.
· Embedded lithium energy cell which will keep RAM data
· Self-contained circuitry which safeguards the data
· With the proper RAM selection data retention time will be greater than 10 years.
· Fully optimized gas-tight socket contacts
· Operating temperature range 0℃ to 70℃
Function of DS1213C
The SmartSocket DS1213C performs five circuit functions necessary for implementing battery backup on a CMOS memory. The first function is the device has a switch that is provided to direct power from the battery or Vcc supply, depending on which is greater. This switch has a voltage drop which will not exceed 0.2V. The second function is power fail detection at input voltages less than 4.75V.DS1213C constantly monitors the Vcc supply. When Vcc falls below 4.75V, a precision comparator detects the condition and inhibits the enabling of the RAM chip.
The third function accomplishes write protection by holding the chip enable signal to the memory to within 0.2V of Vcc or battery supply. If the chip enables signal is active at the time power fail detection occurs, write protection is delayed until after the memory cycle is complete to avoid corruption of data. During nominal power supply conditions, the memory chip enables signal will be passed through to the socket receptacle with a maximum propagation delay of 20 nanoseconds.
The SmartSocket’s fourth function is to check battery status and warn of potential data loss. Each time that Vcc power is restored to the SmartSocket, the battery voltage is compared with a precision comparator. If the battery supply is below 2.0V, the second memory cycle is inhibited. Battery status can therefore be determined by performing a read cycle after powerup to any location in the memory recording the contents of that memory location. A subsequent write cycle can then be executed to the same memory location changing the data. If the next read cycle fails to verify the written data, the contents of the memory are questionable because the battery may not have retained it.
The fifth function is battery redundancy. In many applications data integrity is paramount. The DS1213C has internal batteries. During the battery backup time the battery with the highest voltage is selected for use. If one battery dies, the other automatically takes over. The switch between batteries is transparent to the user. A battery status warning occurs only if both batteries are less than 2.0V. Each of the two lithium cells contains 35mA per hour capacity.
The DS1213C SmartSocket is outdated now, this can be replaced mostly using a pin-compatible, equivalent-density 5V NV SRAM DS1230 module. Below are some of its applications.
· Motor vehicle crash boxes
· Data logging applications
· Some medical equipment’s and high-end servers which needs to store data
5V NV SRAMDS1230 Which replaces DS1213C
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DS1213C has several brands around the world that may have alternate names for DS1213C due to regional differences or acquisition. DS1213C may also be known as the following names:
- Maxim Integrated
Stock Status: 190750
- ≥1: US $8.92080 US $8.02872
- ≥5: US $8.67300 US $7.80570
- ≥10: US $8.17740 US $7.35966
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- ≥50: US $7.68180 US $6.91362
- ≥100: US $7.43400 US $6.69060
- ≥200: US $7.18620 US $6.46758
- ≥500: US $7.03752 US $6.33377
- ≥1000: US $6.93840 US $6.24456