CY14ME064Q datasheet(3/29 Pages) CYPRESS

Part #	CY14ME064Q

Description	64-Kbit (8 K x 8) SPI nvSRAM Infinite read, write, and RECALL cycles

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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3 / 29 page

CY14MC256J

CY14MB256J, CY14ME256J

Document #: 001-65233 Rev. *B

Page 3 of 31

Pinouts

Figure 1. Pin Diagram – 8-pin SOIC [2]

Figure 2. Pin Diagram – 16-pin SOIC

Pin Definitions

Pin Name

I/O Type

Description

SCL

Input

Clock. Runs at speeds up to a maximum of fSCL.

SDA

Input/Output

I/O. Input/Output of data through I2C interface.

WP

Input

Write Protect. Protects the memory from all writes. This pin is internally pulled LOW and hence can

be left open if not connected.

A2-A0[2]

Input

Slave Address. Defines the slave address for I2C. This pin is internally pulled LOW and hence can

be left open if not connected.

HSB

Input/Output

Hardware STORE Busy

Output: Indicates busy status of nvSRAM when LOW. After each Hardware and Software STORE

operation HSB is driven HIGH for a short time (tHHHD) with standard output high current and then a

weak internal pull-up resistor keeps this pin HIGH (External pull up resistor connection optional).

Input: Hardware STORE implemented by pulling this pin LOW externally.

VCAP

Power supply

AutoStore capacitor. Supplies power to the nvSRAM during power loss to STORE data from the

SRAM to nonvolatile elements. If not required, AutoStore must be disabled and this pin left as no

connect. It must never be connected to ground.

NC

No connect

No connect. This pin is not connected to the die.

VSS

Power supply

Ground.

VCC

Power supply

Power supply.

WP

SCL

1

2

3

4

5

A0

8

7

6

V

CC

SDA

A1

A2

V

Top View

not to scale

CY14MX256J1

SS

WP

SCL

1

2

3

4

5

8

7

6

V

CC

SDA

A1

A2

Top View

not to scale

CY14MX256J2

V

CAP

VSS

WP

V

CAP

1

2

3

4

5

6

7

8

9

10

11

12

13

NC

16

15

14

VCC

A2

SDA

SCL

A1

HSB

A0

Top View

not to scale

VSS

NC

CY14MX256J3

Note

2. A0 pin is not available in CY14MX256J2.

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CY14ME064Q Datasheet(PDF) 3 Page - Cypress Semiconductor

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