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Cypress Semiconductor - 64-Kbit (8 K x 8) Serial (I2C) nvSRAM

Numéro de référence CY14E064I
Description 64-Kbit (8 K x 8) Serial (I2C) nvSRAM
Fabricant Cypress Semiconductor 
Logo Cypress Semiconductor 





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CY14E064I fiche technique
PRELIMINARY
CY14C064I
CY14B064I, CY14E064I
64-Kbit (8 K × 8) Serial (I2C) nvSRAM
with Real Time Clock
64-Kbit (8 K × 8) Serial (I2C) nvSRAM with Real Time Clock
Features
64-Kbit nonvolatile static random access memory (nvSRAM)
Internally organized as 8 K × 8
STORE to QuantumTrap nonvolatile elements initiated
automatically on power-down (AutoStore) or by using I2C
command (Software STORE) or HSB pin (Hardware STORE)
RECALL
RECALL)
to
or
SRAM initiated on power-up (Power-Up
by I2C command (Software RECALL)
Automatic STORE on power-down with a small capacitor
High reliability
Infinite read, write, and RECALL cycles
1 million STORE cycles to QuantumTrap
Data retention: 20 years at 85 °C
Real Time Clock (RTC)
Full-featured RTC
Watchdog timer
Clock alarm with programmable interrupts
Backup power fail indication
Square wave output with programmable frequency (1 Hz,
512 Hz, 4096 Hz, 32.768 kHz)
Capacitor or battery backup for RTC
Backup current of 0.45 µA (typical)
High-speed I2C interface
Industry standard 100 kHz and 400 kHz speed
Fast mode Plus 1 MHz speed
High speed: 3.4 MHz
Zero cycle delay reads and writes
Write protection
Hardware protection using Write Protect (WP) pin
Software block protection for one-quarter, one-half, or entire
array
I2C access to special functions
Nonvolatile STORE/RECALL
8-byte serial number
Manufacturer ID and Product ID
Sleep mode
Low power consumption
Average active current of 1 mA at 3.4 MHz operation
Average standby mode current of 250 µA
Sleep mode current of 8 µA
Industry standard configurations
Operating voltages:
• CY14C064I : VCC = 2.4 V to 2.6 V
• CY14B064I : VCC = 2.7 V to 3.6 V
• CY14E064I : VCC = 4.5 V to 5.5 V
Industrial temperature
16-pin small outline integrated circuit (SOIC) package
Restriction of hazardous substances (RoHS) compliant
Overview
The Cypress CY14C064I/CY14B064I/CY14E064I combines a
64-Kbit nvSRAM[1] with a full-featured RTC in a monolithic
integrated circuit with serial I2C interface. The memory is
organized as 8 K words of 8 bits each. The embedded
nonvolatile elements incorporate the QuantumTrap technology,
creating the world’s most reliable nonvolatile memory. The
SRAM provides infinite read and write cycles, while the
QuantumTrap cells provide highly reliable nonvolatile storage of
data. Data transfers from SRAM to the nonvolatile elements
(STORE operation) takes place automatically at power-down.
On power-up, data is restored to the SRAM from the nonvolatile
memory (RECALL operation). The STORE and RECALL
operations can also be initiated by the user through I2C
commands.
Logic Block Diagram
VCC VCAP VRTCcap VRTCbat
Power Control
Block
Sleep
Serial Number
8x8
Manufacture ID/
Product ID
Memory Control Register
Command Register
SDA
SCL
A2, A1, A0
WP
2
I C Control Logic
Slave Address
Decoder
Control Registers Slave
Memory Slave
RTC Slave
Memory
Address and Data
Control
QuantrumTrap
8Kx8
SRAM
8Kx8
STORE
RECALL
X in
INT/SQW
Xout
RTC Control Logic
Registers
Counters
Note
1. Serial (I2C) nvSRAM will be referred to as nvSRAM throughout the datasheet.
Cypress Semiconductor Corporation • 198 Champion Court
wwwD.DocautamSheenett4#U: .0n0et1-68169 Rev. **
• San Jose, CA 95134-1709 • 408-943-2600
Revised April 1, 2011
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