Cypress Semiconductor STK14C88-3 Manual do Utilizador descarregar pdf (Página 1)

Converting from STK14C88-

3 to CY14B256LA

October 5, 2009 Document No. 001-55662 Rev. ** 1

55662

Author: Ravi Prakash

Associated Part Family: STK14C88-3

CY14B256LA

Associated Application Notes: None

Application Note Abstract

This application note provides information for converting from STK14C88-3 parts to the CY14B256LA. It lists the parameter

differences between the parts and the design considerations when converting existing applications from STK14C88-3 to

CY14B256LA.

Introduction

Cypress CY14B256LA is a 3V, 32Kb x 8, 256 Kbit nvSRAM

in 0.13u technology. This part is functionally equivalent to

STK14C88-3 (0.8u) and is intended as a drop in

replacement. This application note highlights the differences

between the STK14C88-3 and the CY14B256LA and the

parameters of significance that must be considered while

migrating.

Overview

The following tables compare the features and parameters

of the two parts. As shown in Table 1, the 256 Kbit nvSRAM

is available in x8 configuration.

Table 1. Part Number Description

Description

Original

Part Number

Replacement

Part Number

32Kb x 8

STK14C88-3

CY14B256LA

Feature Set

Both parts share the same overall feature set and are

available in the operation speed bins as follows.

Table 2. Feature Set Comparison

Feature Set

STK14C88-3

CY14B256LA

AutoStore

Available

Software STORE

Available

Hardware STORE

Available

Software RECALL

Available

AutoStore Inhibit

Available

Not Available

AutoStore

Enable/Disable

Not Available

Available

Feature Set

STK14C88-3

CY14B256LA

Speed

35 ns

45 ns

25 ns

45 ns

STORE Cycles

1,000,000

200,000

Data Retention

100 years at 55°C

20 years at 85°C

Operating Temperature Range

While STK14C88-3 is available in both Commercial and

Industrial temperature ranges, CY14B256LA is offered only

in the Industrial temperature range.

Table 3. Operating Temperature Range Comparison

Operating

Temperature

Range

STK14C88-3

CY14B256LA

Commercial

(0 to 70°C)

Available

Not Available

Industrial

(-40 to 85°C)

Available Available

Packages

CY14B256LA is pin compatible with STK14C88-3 and is

available in the packages and pin configurations as follows.

Table 4. Packages Comparison

Package

STK14C88-3

CY14B256LA

32 SOIC

Available

32 PDIP

Available

Not Available

48 SSOP

Not Available

Available

44 TSOPII

Not Available

Available

[+] Feedback

1 2 3 4 5 6 7 8

Resumo do Conteúdo

Página 1 - 3 to CY14B256LA

Converting from STK14C88-3 to CY14B256LA October 5, 2009 Document No. 001-55662 Rev. ** 1 AN55662 Author: Ravi Prakash Associated Part Fami

Página 2 - Parameters

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 2 Parameters The CY14B256LA is a drop in replacement for STK14C88-3 and requir

Página 3 - Critical Considerations

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 3 Critical ConsiderationsThe impact of the differences in CY14B256LA with respect to

Página 4 - Data Retention

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 4 AutoStore Inhibit The STK14C88-3 has the AutoStore Inhibit feature and the CY14B256LA

Página 5 - Details of Improvement

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 5 Details of ImprovementHardware STORE Related Improvements HSB pin (Hardware STORE

Página 6 - [+] Feedback

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 6 Power Up Recall Related Improvements Additional parameters are specified in CY14B

Página 7 - Summary

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 7 Summary The application note discusses the differences between CY14B256LA in the late

Página 8 - Document History

AN55662 October 5, 2009 Document No. 001-55662 Rev. ** 8 Document History Document Title: Converting from STK14C88-3 to CY14B256LA Document Nu

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