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參數(shù)資料
| 型號(hào)： | HD74HC679 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 8-Input Positive-NAND Gates 14-CDIP -55 to 125 |
| 中文描述： | 12位地址比較器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 67K |
| 代理商： | HD74HC679 |
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 A
1
through A
7
must be low and that inputs A
8
through A
12
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: t
pd
(A to Y) = 18 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 10 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 |
|---|---|
| HD74HC680 | 8-Input Positive-NAND Gates 20-LCCC -55 to 125 |
| HD74HC682 | 8-Input Positive-NAND Gates 14-CDIP -55 to 125 |
| HD74HC684 | 8-Input Positive-NAND Gates 14-CFP -55 to 125 |
| HD74HC688 | 8-bit Magnitude Comparator |
| HD74HC73 | Dual J-K Flip-Flops (with Clear) |
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 |
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