Datasheet > DP8406QV

DP8406QV

更新时间： 2024-02-27 11:20:43

品牌	Logo	应用领域
德州仪器 - TI		逻辑集成电路
页数	文件大小	规格书
14页	225K
描述
IC 84 SERIES, 32-BIT ERROR DETECT AND CORRECT CKT, PQCC52, PLASTIC, LCC-52, Arithmetic Circuit

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DP8406QV 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	QCCJ, LDCC52,.8SQ	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.92
其他特性：	BYTE CONTROL	系列：	84
JESD-30 代码：	S-PQCC-J52	JESD-609代码：	e0
长度：	19.1262 mm	负载电容（CL）：	50 pF
逻辑集成电路类型：	ERROR DETECTION AND CORRECTION CIRCUIT	位数：	32
功能数量：	1	端子数量：	52
最高工作温度：	70 °C	最低工作温度：
输出特性：	3-STATE	封装主体材料：	PLASTIC/EPOXY
封装代码：	QCCJ	封装等效代码：	LDCC52,.8SQ
封装形状：	SQUARE	封装形式：	CHIP CARRIER
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	5 V
最大电源电流（ICC）：	340 mA	传播延迟（tpd）：	28 ns
认证状态：	Not Qualified	座面最大高度：	5.08 mm
子类别：	Arithmetic Circuits	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	技术：	TTL
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	J BEND	端子节距：	1.27 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	19.1262 mm	Base Number Matches：	1

DP8406QV 数据手册

May 1991

DP8406 (54F/74F632)

32-Bit Parallel Error Detection and Correction Circuit

General Description

The DP8406 device is a 32-bit parallel error detection and

correction circuit (EDAC) in a 52-pin or 68-pin package. The

EDAC uses a modified Hamming code to generate a 7-bit

check word from a 32-bit data word. This check word is

stored along with the data word during the memory write

cycle. During the memory read cycle, the 39-bit words from

memory are processed by the EDAC to determine if errors

have occurred in memory.

detected. Otherwise, errors in three or more bits of the

39-bit word are beyond the capabilities of these devices to

detect.

Read-modify-write (byte-control) operations can be per-

formed by using output latch enable, LEDBO, and the indi-

vidual OEB through OEB byte control pins.

Diagnostics are performed on the EDACs by controls and

internal paths that allow the user to read the contents of the

Data Bit and Check Bit input latches. These will determine if

the failure occurred in memory or in the EDAC.

Single-bit errors in the 32-bit data word are flagged and cor-

rected.

Single-bit errors in the 7-bit check word are flagged, and the

CPU sends the EDAC through the correction cycle even

though the 32-bit data word is not in error. The correction

cycle will simply pass along the original 32-bit data word in

this case and produce error syndrome bits to pinpoint the

error-generating location.

Features

Detects and corrects single-bit errors

Detects and flags dual-bit errors

Built-in diagnostic capability

Fast write and read cycle processing times

Dual-bit errors are flagged but not corrected. These errors

may occur in any two bits of the 39-bit word from memory

(two errors in the 32-bit data word, two errors in the 7-bit

check word, or one error in each word). The gross-error

condition of all LOWs or all HIGHs from memory will be

Byte-write capability

Guaranteed 4000V minimum ESD protection

Fully pin and function compatible with TI’s

SN74ALS632A thru SN74ALS635 series

Simplified Functional Block

TL/F/9579–9

Device

DP8406

Package

52-Pin

Byte-Write

Output

TRI-STATE

yes

68-Pin

FASTÉ and TRI-STATEÉ are registered trademarks of National Semiconductor Corporation.

1995 National Semiconductor Corporation

TL/F/9579

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...14

中文翻译

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与DP8406QV相关器件

型号	品牌	获取价格	描述	数据表
DP8406QV(74F632QC)	NSC	获取价格	32-Bit Parallel Error Detection and Correction Circuit
DP8406QVX	TI	获取价格	84 SERIES, 32-BIT ERROR DETECT AND CORRECT CKT, PQCC52, PLASTIC, CC-52
DP8406V	NSC	获取价格	32-Bit Parallel Error Detection and Correction Circuit
DP8406V	TI	获取价格	84 SERIES, 32-BIT ERROR DETECT AND CORRECT CKT, PQCC68, PLASTIC, LCC-68
DP8406V(74F632VC)	NSC	获取价格	32-Bit Parallel Error Detection and Correction Circuit
DP8406VX	TI	获取价格	84 SERIES, 32-BIT ERROR DETECT AND CORRECT CKT, PQCC68, PLASTIC, LCC-68
DP8408A	ETC	获取价格	DRAM Controller
DP8408A/-2	ETC	获取价格	DRAM Controller
DP8408AD	ETC	获取价格	DRAM Controller
DP8408AD/A+	ETC	获取价格	DRAM Controller

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