(China (Mainland))
Product Summary
The U634H256SA35Z is a kind of fast static RAM (25, 35, 45 ns), with a nonvolatile electrically erasable PROM (EEPROM) element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent nonvolatile data resides in EEPROM. The device has two separate modes of operation: SRAM mode and nonvolatile mode. In SRAM mode, the memory operates as an ordinary static RAM. In nonvolatile operation, data is transferred in parallel from SRAM to EEPROM or from EEPROM to SRAM. In this mode SRAM functions are disabled.
Parametrics
Absolute maximum ratings: (1)Power Supply Voltage, VCC: -0.5 to 7 V; (2)Input Voltage, V: -0.3 to VCC+0.5 V; (3)Output Voltage, VO: -0.3 to VCC+0.5 V; (4)Power Dissipation, PD: 1 W; (5)Operating Temperature: C-Type: 0 to 70 鈩? K-type: -40 to 85鈩? A-type: -55 to 125 鈩?M-type: -55 to 125 鈩? (6)Storage Temperature, Tstg: -65 to 150 鈩?
Features
Features: (1)High-performance CMOS nonvolatile static RAM 32768 x 8 bits; (2)25, 35 and 45 ns Access Times; (3)10, 15 and 20 ns Output Enable Access Times; (4)ICC = 15 mA typ. at 200 ns Cycle Time; (5)Automatic STORE to EEPROM; (6)on Power Down using external; (7)capacitor; (8)Hardware or Software initiated STORE (STORE Cycle Time < 10 ms); (9)Automatic STORE Timing; (10)105 STORE cycles to EEPROM; (11)10 years data retention in EEPROM; (12)Automatic RECALL on Power Up; (13)Software RECALL Initiation (RECALL Cycle Time < 20 ms); (14)Unlimited RECALL cycles from EEPROM; (15)Single 5 V 卤 10 % Operation; (16)Operating temperature ranges: 0 to 70 鈩? -40 to 85 鈩? -40/-55 to 125; (only 35 ns); (17)QS 9000 Quality Standard; (18)ESD protection > 2000 V (MIL STD 883C M3015.7-HBM); (19)Packages: SOP32 (300 mil), PDIP32 (600 mil, only C/K-Type).
Diagrams
<IMG src="http://www.seekic.com/uploadfile/ic-mfg/201132551127332.jpg" border=0>
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 U634 |
Apem |
Switch Hardware PushButton Cap Gray |
Data Sheet |
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U634H256 |
Other |
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Data Sheet |
Negotiable |
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U634H256XS |
Other |
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Data Sheet |
Negotiable |
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