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LE25LB643 Schematic ( PDF Datasheet ) - Sanyo Semicon Device

Teilenummer LE25LB643
Beschreibung Serial SPI EEPROM
Hersteller Sanyo Semicon Device
Logo Sanyo Semicon Device Logo 




Gesamt 14 Seiten
LE25LB643 Datasheet, Funktion
www.DataSheet.co.kr
Ordering number : ENA1342A
LE25LB643
Serial SPI EEPROM (SPI Bus)
(64Kbit)
Overview
The LE25LB643 is a 64Kbit EEPROM that supports serial peripheral interface (SPI). It realizes high speed operation and
high level reliability by incorporating SANYO’s high performance CMOS EEPROM technology. The interface is
compatible with SPI bus protocol, therefore, it is best suited for applications that require small-scale rewritable nonvolatile
parameter memory. Moreover, the LE25LB643 has a 32 bytes page rewrite function that provides rapid data rewriting.
Features
Capacity
Single supply voltage
Serial interface
Operating clock frequency
Low current dissipation
Page write function
Rewrite time
Number of rewrite times
Data retention period
High reliability
: 64Kbits (8K×8bits)
: 1.8V to 3.6V
: SPI Mode0, Mode3 supported
: 5MHz (2.5V to 3.6V), 3MHz (1.8V to 3.6V)
: Standby
: 3μA (max.)
: Active (Read) : 1mA (max.)
: Active (Rewrite) : 3mA (max.)
: 32bytes
: 10ms
: 106 times/Address
: 20years
: Adopts SANYO’s proprietary symmetric memory array configuration (USP6947325)
Incorporates a feature to prohibit write operations under low voltage conditions.
* This product is licensed from Silicon Storage Technology, Inc. (USA), and manufactured and sold by SANYO Semiconductor Co., Ltd.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
10511 SY/51309 SY /20090414-S000003 No.NA1342-1/14
Datasheet pdf - http://www.DataSheet4U.net/






LE25LB643 Datasheet, Funktion
www.DataSheet.co.kr
Figure 3 Serial Output Timing
(SPI Mode 0)
LE25LB643
CS
SCK
SO
SI
tCLZ
tHO
DATA VALID
tV
(SPI Mode 3)
CS
SCK
SO
SI
tCLZ
tHO
DATA VALID
tV
tCHZ
tCHZ
No.NA1342-6/14
Datasheet pdf - http://www.DataSheet4U.net/

6 Page









LE25LB643 pdf, datenblatt
www.DataSheet.co.kr
LE25LB643
7. Hardware Data Protection
In order to protect against unintentional writing at power-on, the LE25LB643 incorporates a power-on reset function.
8. Software Data Protection
This product eliminates the possibility of unintentional operations by not recognizing commands under the following
conditions.
When a write command is input and the rising CS edge timing is not in a bus cycle (8CLK units of SCK).
When the write data is not in 1-byte increments.
When the status register write command is input for 2bus cycles or more.
9. Power-on
In order to protect against unintentional writing, CS must be kept at VDD at power-on. After power-on, the supply
voltage has stabilized at 1.8V or higher, wait for 10μs (tPU_READ) before inputting the command to start a read
operation. Similarly, wait for 10ms (tPU_WRITE) after the supply voltage has stabilized at 1.8V or higher before
inputting the command to start a write operation.
10. Decoupling Capacitor
A0.1μF ceramic capacitor must be provided to each device and connected between VDD and VSS in order to ensure
that the device will operate stably.
No.NA1342-12/14
Datasheet pdf - http://www.DataSheet4U.net/

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