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HD74HC679 の電気的特性と機能

HD74HC679のメーカーはHitachi Semiconductorです、この部品の機能は「12-bit Address Comparator」です。


製品の詳細 ( Datasheet PDF )

部品番号 HD74HC679
部品説明 12-bit Address Comparator
メーカ Hitachi Semiconductor
ロゴ Hitachi Semiconductor ロゴ 




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HD74HC679 Datasheet, HD74HC679 PDF,ピン配置, 機能
HD74HC679
12-bit Address Comparator
Description
The HD74HC679 address comparator simplifies addressing of memory boards and/or other peripheral
devices. The four P inputs are normally hard wired with a preprogrammed address. An internal decoder
determines what input information applied to the 12 A inputs must be low or high to cause a low state at the
output (Y). For example, a positive-logic bit combination of 0111 (decimal 7) at the P input determines
that inputs A1 through A7 must be low and that inputs A8 through A12 must be high to cause the output to go
low. Equality of the address amplified at the A inputs to the preprogrammed address is indicated by the
output being low.
The HD74HC679 features and enable input (G). When G is low, the device is enabled. When G is high,
the device is disabled and the output is high regardless of the A and P inputs.
Features
High Speed Operation: tpd (A to Y) = 18 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)

1 Page





HD74HC679 pdf, ピン配列
Pin Arrangement
A1 1
A2 2
A3 3
A4 4
A5 5
A6 6
A7 7
A8 8
A9 9
GND 10
(Top view)
20 VCC
19 G
18 Y
17 P3
16 P2
15 P1
14 P0
13 A12
12 A11
11 A10
HD74HC679
3


3Pages


HD74HC679 電子部品, 半導体
HD74HC679
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Symbol
Propagation delay tPLH
time
t PHL
VCC (V)
2.0
4.5
6.0
Min Typ Max Min
— — 310 —
— 27 62 —
— — 52 —
Max Unit
390 ns
78
66
tPLH 2.0 — — 180 — 225 ns
tPHL 4.5 — 18 36 — 45
6.0 — — 31 — 38
tPLH 2.0 — — 125 — 155 ns
tPHL 4.5 — 14 25 — 31
6.0 — — 21 — 26
Output rise/fall
time
t TLH
t THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
P to Y
A to Y
G to Y
6

6 Page



ページ 合計 : 10 ページ
 
PDF
ダウンロード
[ HD74HC679 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。


共有リンク

Link :


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