CY14B104M Просмотр технического описания (PDF) - Cypress Semiconductor

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CY14B104M

4 Mbit (512K x 8/256K x 16) nvSRAM with Real-Time-Clock

Cypress Semiconductor 

PRELIMINARY

CY14B104K/CY14B104M

4 Mbit (512K x 8/256K x 16) nvSRAM with

Real-Time-Clock

Features

■ 15 ns, 20 ns, 25 ns, and 45 ns access times

■ Internally organized as 512K x 8 (CY14B104K) or 256K x 16

(CY14B104M)

■ Hands off automatic STORE on power down with only a small

capacitor

■ STORE to QuantumTrap® nonvolatile elements is initiated by

software, device pin, or AutoStore® on power down

■ RECALL to SRAM initiated by software or power up

■ High reliability

■ Infinite read, write, and recall cycles

■ 200,000 STORE cycles to QuantumTrap

■ 20 year data retention

■ Single 3V +20%, –10% operation

■ Data integrity of Cypress nvSRAM combined with full featured

Real-Time-Clock

■ Watchdog timer

■ Clock alarm with programmable interrupts

■ Capacitor or battery backup for RTC

■ Commercial and industrial temperatures

■ 44/54-pin TSOP II package

■ Pb-free and RoHS compliance

Functional Description

The Cypress CY14B104K/CY14B104M combines a 4-Mbit

nonvolatile static RAM with a full featured real-time-clock in a

monolithic integrated circuit. The embedded nonvolatile

elements incorporate QuantumTrap technology producing the

world’s most reliable nonvolatile memory. The SRAM is read and

written an infinite number of times, while independent nonvolatile

data resides in the nonvolatile elements.

The real-time-clock function provides an accurate clock with leap

year tracking and a programmable, high accuracy oscillator. The

alarm function is programmable for one time alarms or periodic

seconds, minutes, hours, or days. There is also a programmable

watchdog timer for process control.

Logic Block Diagram

VCC VCAP VRTCcap VRTCbat

[1]

Address A0 - A18

CE

OE

WE

BHE

BLE

CY14B104K

CY14B104M

[1]

DQ0 - DQ7

HSB

INT

X1

X2

VSS

Note

1. Address A0 - A18 and DQ0 - DQ7 for x8 configuration, Address A0 - A17 and Data DQ0 - DQ15 for x16 configuration.

Cypress Semiconductor Corporation • 198 Champion Court

Document #: 001-07103 Rev. *I

• San Jose, CA 95134-1709 • 408-943-2600

Revised June 20, 2008

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