- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370479 > HD74HC670 (Hitachi,Ltd.) 4-by-4 Register File (with 3-state outputs) PDF資料下載
參數(shù)資料
| 型號(hào)： | HD74HC670 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-by-4 Register File (with 3-state outputs) |
| 中文描述： | 4 × 4寄存器文件（具有三態(tài)輸出） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 56K |
| 代理商： | HD74HC670 |
HD74HC670
4-by-4 Register File (with 3-state outputs)
Description
The HD74HC670, 16-bit register file is organized as 4 words of 4 bits each and separate on-chip decoding
is provided for addressing the four word locations to either write-in or retrieve data.
This permits simultaneous writing into one location and reading from another word location. Four data
inputs are available which are used to supply the 4-bit word to be stored. Location of the word is
determined by the write-address inputs A and B in conjunction with a write-enable signal. Data applied at
the inputs should be in its true form. That is, if a high-level signal is desired from the output, a high-level is
applied at the data input for that particular bit location. The latch inputs are arranged so that new data will
be accepted only if both internal address gate inputs are high. When this condition exists, data at the D
input is transferred to the latch output. When the write-enable input, (G
W
) is high, the data inputs are
inhibited and their levels can cuase no change in the information stored in the internal latches. When the
read-enable input, (G
R
) is high, the data outputs are inhibited and go into the high-impedance state. The
individual address lines permit direct acquisition of data stored in any four of the latches. Four individual
decoding gates are used to complete the address for reading a word. when the read address is made in
conjunction with the read-enable signal, the word appears at the four outputs.
Features
High Speed Operation: t
pd
(Read Select to Q) = 21 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 μA max
Low Quiescent Supply Current: I
CC
(static) = 4 μA max (Ta = 25°C)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD74HC673 | 16-bit Shift Register |
| HD74HC674 | 16-bit Shift Register |
| HD74HC677 | 16-bit Address Comparator |
| HD74HC678 | 16-bit Address Comparator |
| HD74HC679 | 8-Input Positive-NAND Gates 14-CDIP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD74HC684P(E) | 制造商:Renesas Electronics Corporation 功能描述: |
| HD74HC688FP(E) | 制造商:Renesas Electronics Corporation 功能描述: |
| HD74HC73P | 制造商:Renesas Electronics 功能描述:74HC Dual J-K Flip-Flop with Preset and Clear Bulk |
| HD74HC74FP-E | 制造商:Renesas Electronics Corporation 功能描述:Flip Flop D-Type Pos-Edge 2-Element 14-Pin SOP 制造商:Renesas Electronics Corporation 功能描述:Logic, 74HC series, SOP-14 |
| HD74HC74FPEL-E | 制造商:Renesas Electronics Corporation 功能描述:Logic, 74HC series, SOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。