Specifications
| Density |
64K bits |
| Max. Clock Freq. |
16 MHz |
| Page Size (bytes) |
32 |
| Op. Volt Range (V) |
1.5 to 1.95 |
| Temp Range (°C) |
-40°C to +85°C |
DescriptionThe Microchip Technology Inc. 23X640 are 64 KbitSerial SRAM devices. The memory is accessed via asimple Serial Peripheral Interface (SPI) compatibleserial bus. The bus signals required are a clock input(SCK) plus separate data in (SI) and data out (SO)lines. Access to the device is controlled through a ChipSelect (CS) input.Communication to the device can be paused via thehold pin (HOLD). While the device is paused,transitions on its inputs will be ignored, with theexception of Chip Select, allowing the host to servicehigher priority interrupts.The 23X640 is available in standard packagesincluding 8-lead PDIP and SOIC, and advancedpackaging including 8-lead TSSOP.
The 23A640 is designed as one kind of 64 Kbit Electrically Erasable PROM device that is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. Also this device is available in standard packages including 8-lead PDIP and SOIC, and advanced packaging including 8-lead TSSOP.
Features of the 23A640 are:(1)Max. Clock 20 MHz; (2)Low-Power CMOS Technology: Read Current: 3 mA at 1 MHz and Standby Current: 4 uA Max. at +85; (3)8192 x 8-bit Organization; (4)32-Byte Page; (5)HOLD pin; (6)Sequential Read/Write; (7)High Reliability; (8)Pb-Free and RoHS Compliant, Halogen Free.etc.
The absolute maximum ratings of the 23A640 can be summarized as:(1)VCC: 4.5 V;(2)All inputs and outputs w.r.t. VSS: -0.3V to VCC +0.3V;(3)Storage temperature: -65°C to +150°C;(4)Ambient temperature with power applied: -40°C to +85°C;(5)ESD protection on all pins: >/= 2 kV. If you want to know more information about the 23A640, please download the datasheet in www.seekic.com or www.chinaicmart.com .
23A640 Data Sheet
