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FM573-P Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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FM573-P Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 10 page Preliminary This data sheet contains specifications for a product under development. Ramtron International Corporation Characterization is not complete; specifications may change without notice. 1850 Ramtron Drive, Colorado Springs, CO 80921 (800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058 27 March 2001 www.ramtron.com 1/10 FM573/574 Nonvolatile Octal Latch/Register Features 8-bit Nonvolatile Latch • Logic state is preserved in the absence of power • Over 10 Billion (10 10) nonvolatile state changes • Advanced high-reliability ferroelectric process Operates like conventional CMOS logic • Transparent (573) or D-Flip-flop (574) operation • FM573 transparent for C high, latched for C low • FM574 data is clocked on the rising edge of C • 33/80 ns data propagation delay (5V/3V) • 30 MHz/12 MHz Maximum frequency (5V/3V) Automatic Nonvolatile Operation • Latched state is stored automatically • State is automatically restored on power-up • Power supply monitor prevents low-VDD writes Low Power Operation • Supply voltage of 2.7V to 5.5V • 125 µA standby current Industry Standard Configuration • Industrial temperature -40 ° C to +85° C • 20-pin SOP or DIP Description The FM573 and FM574 are innovative circuits that store inputs like conventional logic families, and then retain the stored state in the absence of power. These products solve three basic problems in an elegant fashion. First, they provide continuous access to nonvolatile system settings without performing a memory read operation or using dedicated processor I/O pins. Second, they allow the storage of signals or data that may change frequently and possibly without notice. Third, they allow the nonvolatile storage of a few bits of data or system settings without the system overhead and extra pins of a serial memory. The FM573 is a transparent latch. The inputs are passed to the outputs when the clock is high; the state is latched when the clock goes low. The FM574 is a D- type register. Inputs are stored and passed to the outputs on the rising edge of the clock. The nonvolatile latch is a unique product that serves a variety of applications. A few ideas as follows: ü Controls relays and valves with automatic setting on power-up without processor intervention. ü Interface to soft/momentary front-panel switches and indicator lamps. Capture switch settings and light LED’s without processor intervention. ü Replaces jumpers & control signal routing ü Initialize state of I/O card signals. ü Save system errors or status codes when power fails with a fast, no overhead write and automatic restore on power up. ü Eliminate the overhead of serial memory for systems needing only a few bits of data. The FM573 and FM574 are provided in a 20-pin DIP or SOP. They are rated from –40C to +85C. Pin Configuration 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 OE D0 D1 D2 D3 D4 D5 D6 D7 VSS VDD Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 C Pin Names Function D0-D7 Data in Q0-Q7 Data Out C Clock/Latch Enable /OE Output enable VSS Ground VDD Supply Voltage Ordering Information FM573-P Transparent latch, 20-pin plastic DIP FM573-S Transparent latch, 20-pin SOP FM574-P Register, 20-pin plastic DIP FM574-S Register, 20-pin SOP Other package types may be available. Contact the factory for more information. |
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