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HD74HC259のメーカーはHitachi Semiconductorです、この部品の機能は「8-bit Addressable Latch」です。 |
部品番号 | HD74HC259 |
| |
部品説明 | 8-bit Addressable Latch | ||
メーカ | Hitachi Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとHD74HC259ダウンロード(pdfファイル)リンクがあります。 Total 8 pages
HD74HC259
8-bit Addressable Latch
Description
The HD74HC259 has a single data input (D), 8 latch outputs (Q0-Q7), 3 address inputs (A, B, and C), a
common enable input (E), and a common clear input. To operate this device as an addressable latch, data is
held on the D input, and the address of the latch into which the data is to be entered is held on the A, B and
C inputs. When enable is taken low the data flows through to the addressed output. The data is stored
when enable transitions from low to high. All unaddressed latches will remain unaffected. With enable in
the high state the device is deselected, and all latches remain in their previous state, unaffected by changes
on the data or address inputs. To eliminate the possibility of entering erroneous data into the latches, the
enable should be held high (inactive) while the address lines are changing.
If enable is held high and clear is taken low all eight latches are cleared to a low state. If enable is low all
latches except the addressed latch will be cleared. The addressed latch will instead follow the D input,
effectively implementing a 3-to-8 line decoder.
Features
• High Speed Operation: tpd (Data to Output) = 16 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Inputs
Clear G
HL
HH
LL
LH
Output of Addressed Latch Each Other Output
D Qio
Qio Qio
DL
LL
Function
Addressable latch
Memory
8-line demultiplexer
Clear
1 Page HD74HC259
DC Characteristics
Item
Input voltage
Output voltage
Input current
Quiescent supply
current
Ta = 25°C
Ta = –40 to
+85°C
Symbol
VIH
VCC (V) Min Typ Max Min
2.0 1.5 — — 1.5
4.5 3.15 — — 3.15
Max
—
—
Unit
V
6.0 4.2 — — 4.2 —
VIL 2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
VOH 2.0 1.9 2.0 — 1.9 — V
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 —
6.0 5.68 — — 5.63 —
VOL 2.0 — 0.0 0.1 — 0.1 V
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33
6.0 — — 0.26 — 0.33
Iin 6.0 — — ±0.1 — ±1.0 µA
ICC 6.0 — — 4.0 — 40 µA
Test Conditions
Vin = VIH or VIL IOH = –20 µA
IOH = –4 mA
IOH = –5.2 mA
Vin = VIH or VIL IOL = 20 µA
IOL = 4 mA
IOL = 5.2 mA
Vin = VCC or GND
Vin = VCC or GND, Iout = 0 µA
3
3Pages 10.06
10.5 Max
16
9
18
0.80 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Unit: mm
7.80
+
–
0.20
0.30
1.15
0.70 ± 0.20
0° – 8°
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-16DA
—
Conforms
0.24 g
6 Page | |||
ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ HD74HC259 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
HD74HC251 | 1 of 8 Data Selectors/Multiplexers (with 3-state outputs) | Hitachi Semiconductor |
HD74HC253 | Dual 4-to-1-line Data Selectors/Multiplexers (with 3-state outputs) | Hitachi Semiconductor |
HD74HC257 | Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs) | Hitachi Semiconductor |
HD74HC258 | Quad. 2-to-1-line Data Selectors/Multiplexers(with 3-state outputs) | Hitachi Semiconductor |