CY14MB064Q Datasheet, PDF (1/31 Pages) Cypress Semiconductor – 64-Kbit (8 K x 8) SPI nvSRAM Infinite read, write, and RECALL cycles

CY14MC256J
CY14MB256J, CY14ME256J
256-Kbit (32 K × 8) Serial (I²C) nvSRAM
256-Kbit (32 K × 8) Serial (I2C) nvSRAM
Features
■ 256-Kbit nonvolatile static random access memory (nvSRAM)
❐ Internally organized as 32 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 to SRAM initiated on power-up (Power-Up
RECALL) or by I²C command (Software RECALL)
❐ Automatic STORE on power-down with a small capacitor
(except for CY14MX256J1)
■ High reliability
❐ Infinite read, write, and RECALL cycles
❐ 1 million STORE cycles to QuantumTrap
❐ Data retention: 20 years at 85 C
■ 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, 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 150 µA
❐ Sleep mode current of 8 µA
■ Industry standard configurations
❐ Operating voltages:
• CY14MC256J: V_CC = 2.4 V to 2.6 V
• CY14MB256J: V_CC = 2.7 V to 3.6 V
• CY14ME256J: V_CC = 4.5 V to 5.5 V
❐ Industrial temperature
❐ 8- and 16-pin small outline integrated circuit (SOIC) package
❐ Restriction of hazardous substances (RoHS) compliant
Overview
The Cypress CY14MC256J/CY14MB256J/CY14ME256J
combines a 256-Kbit nvSRAM^[1] with a nonvolatile element in
each memory cell. The memory is organized as 32 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 (except for CY14MX256J1). 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.
Configuration
Feature
AutoStore
Software
STORE
Hardware
STORE
Slave Address
pins
CY14MX256J1 CY14MX256J2 CY14MX256J3
No
Yes
Yes
Yes
Yes
Yes
No
No
Yes
A2, A1, A0
A2, A1
A2, A1, A0
Logic Block Diagram
VCC VCAP
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
Memory
Address and Data
Control
Note
1. Serial (I²C) nvSRAM is referred to as nvSRAM throughout the datasheet.
QuantrumTrap
32 K x 8
SRAM
32 K x 8
STORE
RECALL
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-65233 Rev. *B
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 5, 2011