Dallas Semiconductor

US$4.89
The DS1307+ is a 8 Pins, Serial real-time clock, 64x8,  2 TIMER(S).      
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US$5.53
The DS1210 is a 8 Pins, Nonvolatile Controller Chip.
Delivery within 2-3 weeks
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US$5.68
IC, MICRO MONITOR SUPERVISOR PDIP8 Type      Simple Reset/Power-On Reset Output: Open Drain, Push-Pull Reset Timeout: Adjustable/Selectable Voltage –...
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US$9.73
The DS12887 is a 24 Pins, Real-time clock 114 x 8 RAM.   
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US$11.13
DS1231-20, 8 pin dip, Dallas Semiconductors, 1 channel power supply.
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US$13.29
3 Pins, One-wire thermometer, TO-92
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US$13.93
The DS1220Y-200 is a  2k x 8, 200ns and DIP-24 Static Ram.
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US$13.93
This is a integrated circuit in the form of SOIC20 which  is a low-cost, extremely accurate SPI bus RTC with an integrated temperature compensated crystal oscillator (TCXO) and crystal.
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US$13.99
8 Pins, Line-powered transceiver
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US$20.99
24 Pins, 16K Nonvolatile SRAM 200ns
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US$27.93
The DS1286 is a WATCHDOG TIME KEEPER.       
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US$27.99
28 Pins, 64K Nonvolatile SRAM 150ns
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US$30.73
The DS1213C is a 28 Pins, Smartsocket 64K/256K Bit.
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US$41.99
28 Pins, 256K Nonvolatile SRAM with Phantom Clock
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