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參數(shù)資料
| 型號(hào)： | HEF4720 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 256-bit, 1-bit per word random access memories |
| 中文描述： | 256位，1每字位隨機(jī)存取存儲(chǔ)器 |
| 文件頁(yè)數(shù)： | 2/16頁(yè) |
| 文件大小： | 180K |
| 代理商： | HEF4720 |
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January 1995
2
Philips Semiconductors
Product specification
256-bit, 1-bit per word random access memories
HEF4720B
HEF4720V
DESCRIPTION
The HEF4720B and HEF4720V are 256-bit, 1-bit per word
random access memories with 3-state outputs. The
memories are fully decoded and completely static.
Recommended supply voltage range for HEF4720B is 3 to
15 V and for HEF4720V is 4,5 to 12,5 V; minimum
stand-by voltage for both types is 3 V.
The use of LOCMOS gives the added advantage of very
low stand-by power. The circuits can be directly interfaced
with standard bipolar devices (TTL) without using special
interface circuits. The memory operates from a single
power supply. The separate chip select input (CS) allows
simple memory expansion when the outputs are wire-O
Red. If CS is HIGH, the outputs are floating and no new
information can be written into the memory. The signal at
O has the same polarity as the data input D, while the
signal at O is the complement of the signal at O. The write
control W must be HIGH for writing into the memory.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
FAMILY DATA
See Family Specifications.
HEF4720BP;
HEF4720VP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4720VD(F): 16-lead DIL; ceramic
(cerdip) (SOT74)
HEF4720VT(D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
HEF4720BD;
HEF4720BT;
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HEF4724BD | 8-bit addressable latch |
| HEF4724BF | 8-bit addressable latch |
| HEF4724BN | 8-bit addressable latch |
| HEF4724BP | 8-bit addressable latch |
| HEF4724BT | 8-bit addressable latch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HEF4750VD,112 | 制造商:NXP Semiconductors 功能描述:FREQUENCY SYNTHESIZER - Rail/Tube |
| HEF4794BP | 制造商:NXP Semiconductors 功能描述:Shift Register Single 8-Bit Serial to Serial/Parallel 16-Pin PDIP Tube |
| HEF4794BP,112 | 功能描述:LED照明驅(qū)動(dòng)器 8STG SHIFT/STORE REG W/LED DRIVER RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| HEF4794BT | 制造商:NXP Semiconductors 功能描述:Shift Register Single 8-Bit Serial to Serial/Parallel 16-Pin SO Tube |
| HEF4794BT,112 | 功能描述:LED照明驅(qū)動(dòng)器 SHIFT/REGISTER STORE RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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