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51W4405B Datasheet

Download or read online Hitachi Semiconductor 51W4405B 1,048,576-word × 4-bit Dynamic Random Access Memory pdf datasheet.



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HM51W4405BS Series
1,048,576-word 4-bit Dynamic Random Access Memory
Description
The Hitachi HM51W4405BS Series is a CMOS dynamic RAM organized 1,048,576-word
HM51W4405BS Series has realized higher density, higher performance and various functions by employing
0.8 m CMOS process technology and some new CMOS circuit design technologies. The HM51W4405BS
Series offers Extended Data Out (EDO) Page Mode as a high speed access mode. It has the package
variations of standard 26-pin plastic SOJ.
Features
Single 3.3 V ( 0.3 V) (HM51W4405BS-7)
Single 3.3 V (+0.3 V/–0.15 V) (HM51W4405BS-6R)
High speed
Access time: 60/70 ns (max)
Low power dissipation
Active mode: 288/252 mW (max)
Standby mode: 7.2 mW (max)
EDO page mode capability
1024 refresh cycles : 16 ms
3 variations of refresh
RAS-only refresh
CAS-before-RAS refresh
Hidden refresh
Ordering Information
Type No.
HM51W4405BS-6R
HM51W4405BS-7
Access time
Package
60 ns
300-mil 26-pin plastic SOJ (CP-26/20D)
70 ns
ADE-203-686A (Z)
Rev. 1.0
Nov. 29, 1996
4-bit.

Summary of Contents

Page 1

... The Hitachi HM51W4405BS Series is a CMOS dynamic RAM organized 1,048,576-word HM51W4405BS Series has realized higher density, higher performance and various functions by employing 0.8 m CMOS process technology and some new CMOS circuit design technologies. The HM51W4405BS Series offers Extended Data Out (EDO) Page Mode as a high speed access mode. It has the package variations of standard 26-pin plastic SOJ ...

Page 2

... Function Address input Row/Refresh Column I/O1 to I/O4 Data-in/Data-out RAS Row address strobe CAS Column address strobe WE Read/Write enable OE Output enable V Power supply CC V Ground SS 2 HM51W4405BS Series I/ RAS (Top view) ...

Page 3

... Row Row Row Row Driver Driver Driver Driver Row Decoder & Peripheral Circuit Row Row Row Row Driver Driver Driver Driver Address A0A9 HM51W4405BS Series OE OE Control Circuit I/O3 I/O4 I/O3 Buffer I/O4 Buffer Row Row Row Driver Driver Driver Row Row Row Driver Driver ...

Page 4

... HM51W4405BS Series Absolute Maximum Ratings Parameter Voltage on any pin relative to V Supply voltage relative Short circuit output current Power dissipation Operating temperature Storage temperature Recommended DC Operating Conditions ( 70 C) Parameter Supply voltage (HM51W4405BS-6R) (HM51W4405BS-7) Input high voltage Input low voltage Note: 1 ...

Page 5

... I CC open condition. 2. Address can be changed twice or less while RAS V 3. Address can be changed once or less while CAS V Capacitance ( 3.3 V 0.3 V/0.15 V) (HM51W4405BS-6R 3.3 V 0.3 V) (HM51W4405BS-7) CC Parameter Input capacitance (Address) Input capacitance (Clocks) Output capacitance (Data-in, Data-out) Notes: 1 ...

Page 6

... RAS hold time CAS hold time CAS to RAS precharge time OE to Din delay time OE delay time from Din CAS setup time from Din Transition time (rise and fall) Refresh period 51W4405BS - 6R (HM51W4405BS- 3.0 V (100 pF) (Including scope and jig) L HM51W4405B -6R ...

Page 7

... OFR t 15 WEZ t 5 — 5 OHR t 60 70 RCHR t 15 18 RCHC t 30 35 RCHA HM51W4405BS Series Max Unit Notes ns — — ns — 6,19 15 ...

Page 8

... HM51W4405BS Series Write Cycle Parameter Write command setup time Write command hold time Write command pulse width Write command to RAS lead time Write command to CAS lead time Data-in setup time Data-in hold time Read-Modify-Write Cycle Parameter Read-modify-write cycle time RAS to WE delay time ...

Page 9

... HM51W4405B -6R -7 Symbol Min Max Min t 66 77 HPCM t 52 60 CPW HM51W4405B -6R -7 Symbol Min Max Min t 40 40 CPT HM51W4405BS Series Max Unit Notes — ns 100000 ns ns ns ns ns Max Unit Notes — ...

Page 10

... HM51W4405BS Series Notes measurements assume t 2. Assumes that t RCD recommended value shown in this table Measured with a load circuit equivalent to 1 TTL loads and 100 pF. 4. Assumes that t RCD 5. Assumes that t RCD 6. t (max), t (max), t OFF1 OFF2 open circuit condition and is not referred to output voltage levels. ...

Page 11

... RCD t CAS t CSH t t RAD RAL t t CAH RAH t ASC Column t CAL t RCS t RCHR t CAC RAC t DZC High-Z t DZO HM51W4405BS Series CRP t t RCHA RDD OHR t t RCH RCHC t RRH t OFR t OFF1 Dout t OFF2 t WEZ t OAC t CDD t ODD ...

Page 12

... HM51W4405BS Series Early Write Cycle RAS t T CAS t ASR Row Address WE Din Dout RAS t RSH t t CAS RCD t CSH RAH ASC CAH Column t t WCS Din High- CRP WCH t t WCS WCS (min) ...

Page 13

... Din t DZO Dout RAS t CSH t RCD t CAS t ASC RAH t CAH Column t t RCS t DS High-Z Din t DZC t ODD Invalid Dout t OFF2 Invalid Dout comes out, when OE is low level. HM51W4405BS Series CRP t RSH t CWL t RWL OEH 13 ...

Page 14

... HM51W4405BS Series Read-Modify-Write Cycle RAS t T CAS t ASR Address WE Din Dout t DZO RWC t RAS t RCD t RAD CAH RAH ASC Row Column t CWD t RCS t AWD RWD t CAC RAC t DZC High-Z Dout t OAC t OFF2 t ODD t OEP CAS ...

Page 15

... RAS-Only Refresh Cycle RAS CAS t Address Dout RAS CRP t RAH ASR Row High-Z HM51W4405BS Series RPC CRP 15 ...

Page 16

... HM51W4405BS Series CAS-Before-RAS Refresh Cycle RAS t CAS t CPN WE Address Dout RAS t t RPC CSR CHR OFR t OFF1 High and RPC CRP t CPN must be satisfied while CAS ...

Page 17

... Dout t DZC Din t DZO RAS RP RAS (Refresh) t RSH t CAS ASC t RAL t CAH Column t CAC OAC HM51W4405BS Series RAS RP (Refresh CHR Dout t OFF2 High-Z CRP t RCH t RRH t OHR t OFF1 WEZ t WDD t CDD ...

Page 18

... HM51W4405BS Series EDO Page Mode Read Cycle (t RAS RCD CAS t ASR t RAD t RAH Address Row t RCS WE Din Dout OE 18 minimum cycle operation) HPC t RASC t t CSH HPC CAS CP CAS t t CAL CAL CAH CAH ASC ASC Column 1 ...

Page 19

... CAS t t RCS RCH t t CAH ASC Column 2 t CAL High-Z t COL t ACP OFF2 t CAC t WEZ t OAC Dout 1 Dout 2 HM51W4405BS Series t HPC t t HPC RHCP CAS CAS t RCHP t RCHC t RAL ASC CAH ASC CAH Column 3 ...

Page 20

... HM51W4405BS Series EDO Page Mode Early Write Cycle (t RAS RCD CAS t t ASR RAH Address Row WE Din Dout 20 minimum cycle operation) HPC t RASC t t CSH HPC CAS CP CAS CAH CAH ASC ASC Column Column WCS ...

Page 21

... RASC t t CSH HPC CAS CP t ASC t ASC t CAH Column Column t CWL RCS RCS Din High-Z HM51W4405BS Series t RSH t t CAS CP CAS t ASC t CAH t CAH Column t t CWL CWL RWL t t RCS ...

Page 22

... HM51W4405BS Series EDO Page Mode Read-Modify-Write Cycle RAS t RCD t T CAS t RAD t RAH t ASR t ASC Row Column Address t RCS WE t DZC High-Z Din RAC t OAC Dout t t DZO OE t OEP CAS t ACP t t CAH CAH t ASC Column ...

Page 23

... RASC CAS ASC CAH ASC Column 2 Column 3 t CAL High-Z t ACP OAC t CAC t DOH Dout 2 HM51W4405BS Series CAS CAS t RCHP t RCHC t t CPW t WP RCHA t AWD t RAL t t CAH CAH t ASC Column CAL ...

Page 24

... HM51W4405BS Series EDO Page Mode Mix Cycle (2) RAS CSH CAS t CAS t t RCHR RCS ASC CAH t t RAH ASR Address Row Column 1 t CAL High-Z Din OAC t CAC t RAC Dout 24 20 t RASC CAS WCS ...

Page 25

... CAS-Before-RAS Refresh Counter Check Cycle (Read) RAS t CSR CAS Address Din Dout OE t RAS CHR CPT t ASC RCS t DZC DZO HM51W4405BS Series RSH t CAS t CAL t CAH Column t RCH t RRH t CDD High-Z t OHR t CAC t OFR t OFF1 t OH Dout t OFF2 ...

Page 26

... HM51W4405BS Series CAS-Before-RAS Refresh Counter Check Cycle (Write) RAS CSR CAS Address Din Dout RAS t t CHR CPT t ASC t t WCS Din High RSH t CAS t CAL t CAH Column t WCH CRP ...

Page 27

... Package Dimensions HM51W4405BS Series (CP-26/20D) 26 0.43 ± 0.10 0.41 ± 0.08 16.90 17.27 Max 0.74 1.30 Max 1.27 5.08 0.10 HM51W4405BS Series 6.71 ± 0.28 Hitachi Code CP-26/20D JEDEC Code MO-077-AA EIAJ Code SC-633A Weight 0.6 g Unit ...

Page 28

... HM51W4405BS Series When using this document, keep the following in mind: 1. This document may, wholly or partially, be subject to change without notice. 2. All rights are reserved: No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without Hitachis permission. 3. Hitachi will not be held responsible for any damage to the user that may result from accidents or any other reasons during operation of the user’ ...

Page 29

... Revision Record Rev. Date Contents of Modification 1.0 Nov. 29, 1996 Initial issue HM51W4405BS Series Drawn by Approved by 29 ...

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