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參數(shù)資料
| 型號： | HD74AC |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | HD74AC Series Common Information |
| 中文描述： | HD74AC系列通用信息 |
| 文件頁數(shù)： | 4/52頁 |
| 文件大?。?/td> | 220K |
| 代理商： | HD74AC |
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FACT Descriptions and Family Characteristics
3
AC performance specifications are guaranteed at 5.0 V
±
0.5 V and 3.3 V
±
0.3 V. For worst case design at
2.0 V V
CC
on all device types, the formula below can be used to determine AC performance.
AC performance at 2.0 V V
CC
= 1.9
×
AC specification at 3.3 V
1.5 Multiple Output Switching
Propagation delay is affected by the number of outputs switching simultaneously. Typically, devices with
more than one output will follow the rule: for each output switching, derate the databook specification by
250 ps. This effect typically is not significant on an octal device unless more than four outputs are
switching simultaneously. This derating is valid for the entire temperature range and 5.0 V
±
10% V
CC
.
1.6 Noise Immunity
The noise immunity of a logic family is also an important equipment cost factor in terms of decoupling
components, power supply dynamic resistance and regulation as well as layout rules for PC boards and
signal cables.
The comparisons shown describe the difference between the input threshold of a device and the output
voltage, |V
IL
–V
OL
| / |V
IH
–V
OH
| at 4.5 V V
CC
.
FACT = 1.25/1.25 V
ALS = 0.4/0.7 V
LS = 0.3/0.7 V@ 4.75 V V
CC
HC = 1.25/1.25 V
1.7 Output Characteristics
All FACT outputs are buffered to ensure consistent output voltage and current specifications across the
family. Both HD74AC and HD74ACT device types have the same output structures. Two clamp diodes
are internally connected to the output pin to suppress voltage overshoot and undershoot in noisy system
applications witch can result from impedance mismatching. The balanced output design allows for
controlled edge rates and equal rise and fall times.
All devices (HD74AC or HD74ACT) are guaranteed to source and sink 24 mA. HD74AC/ACTXXX, are
capable of driving 50
transmission lines.
1.7.1 I
OL
/I
OH
Characteristics
FACT = 24/–24 mA
ALS = 24/–15 mA
LS = 8/–0.4 mA @ 4.75 V V
CC
HC = 4/–4 mA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD74ALVC162244 | 16-bit Buffer / Driver with 3-state Outputs(帶三態(tài)輸出的16位緩沖器/驅(qū)動器) |
| HD74ALVC162334 | 16-bit Universal Bus Driver with 3-state Outputs(帶三態(tài)輸出的16位通用總線驅(qū)動器) |
| HD74ALVC16244 | 16-bit Buffer / Driver with 3-state Outputs(帶三態(tài)輸出的16位緩沖器/驅(qū)動器) |
| HD74ALVC162831 | 1-bit to 4-bit Address Register / Driver with 3-state Outputs(三態(tài)輸出的1位-4位地址寄存器/驅(qū)動器) |
| HD74ALVC162834A | 1-Of-8 Data Selectors/Multiplexers 16-CDIP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD74AC00 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Quad 2-Input NAND Gate |
| HD74AC00FP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Quad 2-input NAND Gate |
| HD74AC00FPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
| HD74AC00P | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
| HD74AC00RPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
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