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參數(shù)資料
| 型號(hào)： | 74F524 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit register comparator open-collector 3-State |
| 中文描述： | 8位寄存器比較集電極三態(tài) |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 131K |
| 代理商： | 74F524 |
Philips Semiconductors
Product specification
74F524
8-bit register comparator (open collector + 3-State)
1990 Aug 07
4
CS/O output of the most significant device will be forced Low,
disabling the subsequent devices but enabling its own status
outputs. The corrected status condition is thus indicated. The same
applies if the register byte is less than the data byte, only in this
case the EQ and GT outputs go Low, whereas the LT output floats
High.
If an equality condition is detected in the most significant device, its
C/SO output is forced High. This enables the next less significant
device and disables its own status outputs. In this way, the status
output proximity is handed down to the next less significant device
which now effectively becomes the most significant byte. The worst
case propagation delay for a compare operation involving ‘n’
cascaded 74F524s will be when an equality condition is detected in
all but the least significant byte. In this case, the status priority has
to ripple all the way down the chain before the correct status output
is established. Typically, this will take 35+6(n–2) ns.
APPLICATION
C/SI
M
GT
EQ
LT
S0
S1
I/O
SE
C/SO
H
C/SI
M
GT
EQ
LT
S0
S1
I/O
SE
C/SO
C/SI
M
GT
EQ
LT
S0
S1
I/O
SE
C/SO
RD
WR
MSB
8
8
8
LSB
L
L
L
H = TWO’s COMPLEMENT
L = MAGNITUDE
GREATER THAN
EQUAL TO
LESS THAN
V
CC
SF01012
Figure 1. Cascading 74F524s for Comparing Longer Words
FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
SE
C/SI
S0
S1
Data comparison
EQ
GT
LT
C/SO
H
H
L
L
X
H
H
H
(1)
Hold
H
L
L
L
X
H
H
H
L
H
X
H
L
X
H
H
H
Q0
Shift
H
H
L
H
X
H
H
H
(1)
Read
H
L
L
H
X
H
H
H
L
H
H
H
H
X
H
H
H
(1)
Load
H
L
H
H
X
H
H
H
L
L
L
H or L
2
H or L
2
OA–OH > I/O0–I/O7
L
H
H
L
L
L
H or L
2
H or L
2
OA–OH = I/O0–I/O7
H
H
H
L
Compare
(GT=CT=off)
L
L
H or L
2
H or L
2
OA–OH < I/O0–I/O7
L
H
H
L
L
H
H or L
2
H or L
2
OA–OH > I/O0–I/O7
L
H
L
L
L
H
H or L
2
H or L
2
OA–OH = I/O0–I/O7
H
L
L
H
Compare
(GT=CT=on)
L
H
H or L
2
H or L
2
OA–OH < I/O0–I/O7
L
L
H
L
(1) = High if I/On=Dn, otherwise Low
2
= Must meet setup and hold time requirements
H = High voltage level
L
= Low voltage level
X = Don’t care
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相關(guān)代理商/技術(shù)參數(shù) |
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| 74F524 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F524DC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Magnitude Comparator |
| 74F524PC | 功能描述:校驗(yàn)器 IC 8-Bit Reg Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| 74F524SC | 功能描述:校驗(yàn)器 IC 8-Bit Reg Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| 74F524SCX | 功能描述:校驗(yàn)器 IC 8-Bit Reg Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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