參數(shù)資料
型號(hào)： MMBD701L
廠商： ON SEMICONDUCTOR
元件分類： 射頻混頻器
英文描述： SILICON, VHF-UHF BAND, MIXER DIODE, TO-236AB
封裝： PLASTIC, CASE 318-08, 3 PIN
文件頁(yè)數(shù)： 22/33頁(yè)
文件大小： 309K
代理商： MMBD701L
Reliability and Quality Assurance
9–18
Motorola Small–Signal Transistors, FETs and Diodes Device Data
Figure 2. Impact of Assignable Causes
on Process Predictable
Figure 3. Difference Between Process
Control and Process Capability
?
Process “under control” – all assignable causes are
removed and future distribution is predictable.
PREDICTION
TIME
SIZE
TIME
PREDICTION
SIZE
TIME
Out of control
(assignable causes present)
In control assignable
causes eliminated
SIZE
TIME
In control but not capable
(variation from random variability
excessive)
Lower
Specification Limit
Upper
Specification Limit
In control and capable
(variation from random
variability reduced)
?
At Motorola, for critical parameters, the process capability
is acceptable with a Cpk = 1.50 with continual improvement
our goal. The desired process capability is a Cpk = 2 and the
ideal is a Cpk = 5. Cpk, by definition, shows where the current
production process fits with relationship to the specification
limits. Off center distributions or excessive process variability
will result in less than optimum conditions.
SPC IMPLEMENTATION AND USE
CPSTG uses many parameters that show conformance to
specification. Some parameters are sensitive to process
variations while others remain constant for a given product
line. Often, specific parameters are influenced when changes
to other parameters occur. It is both impractical and
unnecessary to monitor all parameters using SPC methods.
Only critical parameters that are sensitive to process
variability are chosen for SPC monitoring. The process steps
affecting these critical parameters must be identified as well.
It is equally important to find a measurement in these process
steps that correlates with product performance. This
measurement is called a critical process parameter.
Once the critical process parameters are selected, a
sample plan must be determined. The samples used for
measurement are organized into RATIONAL SUBGROUPS
of approximately two to five pieces. The subgroup size should
be such that variation among the samples within the subgroup
remain small. All samples must come from the same source
e.g., the same mold press operator, etc. Subgroup data should
be collected at appropriate time intervals to detect variations
in the process. As the process begins to show improved
stability, the interval may be increased. The data collected
must be carefully documented and maintained for later
correlation. Examples of common documentation entries are
operator, machine, time, settings, product type, etc.
Once the plan is established, data collection may begin. The
data collected with generate X and R values that are plotted
with respect to time. X refers to the mean of the values within
a given subgroup, while R is the range or greatest value minus
least value. When approximately 20 or more X and R values
have been generated, the average of these values is
computed as follows:
X = (X + X2 + X3 + . . .)/K
R = (R1 + R2 + R2 + . . .)/K
where K = the number of subgroups measured.
The values of X and R are used to create the process control
chart. Control charts are the primary SPC tool used to signal
a problem. Shown in Figure 4, process control charts show X
and R values with respect to time and concerning reference
to upper and lower control limit values. Control limits are
computed as follows:
R upper control limit = UCLR = D4 R
R lower control limit = LCLR = D3 R
X upper control limit = UCLX = X + A2 R
X lower control limit = LCL X = X – A2 R
相關(guān)PDF資料
PDF描述
MMJL-29C80FHXXX 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQCC44
MMJL-29C80F 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQFP44
MMJL-29C80F/883 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQCC44
MMJL-29C80F/883 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQFP44
SMJL-29C80FHXXX 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQFP44
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MMBD701LT1 功能描述:肖特基二極管與整流器 70V 200mW Dual RoHS:否 制造商:Skyworks Solutions, Inc. 產(chǎn)品:Schottky Diodes 峰值反向電壓:2 V 正向連續(xù)電流:50 mA 最大浪涌電流: 配置:Crossover Quad 恢復(fù)時(shí)間: 正向電壓下降:370 mV 最大反向漏泄電流: 最大功率耗散:75 mW 工作溫度范圍:- 65 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-143 封裝:Reel
MMBD701LT1G 功能描述:肖特基二極管與整流器 70V 200mW Dual Common Anode RoHS:否 制造商:Skyworks Solutions, Inc. 產(chǎn)品:Schottky Diodes 峰值反向電壓:2 V 正向連續(xù)電流:50 mA 最大浪涌電流: 配置:Crossover Quad 恢復(fù)時(shí)間: 正向電壓下降:370 mV 最大反向漏泄電流: 最大功率耗散:75 mW 工作溫度范圍:- 65 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-143 封裝:Reel
MMBD701LT3 功能描述:肖特基二極管與整流器 70V 200mW Dual RoHS:否 制造商:Skyworks Solutions, Inc. 產(chǎn)品:Schottky Diodes 峰值反向電壓:2 V 正向連續(xù)電流:50 mA 最大浪涌電流: 配置:Crossover Quad 恢復(fù)時(shí)間: 正向電壓下降:370 mV 最大反向漏泄電流: 最大功率耗散:75 mW 工作溫度范圍:- 65 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-143 封裝:Reel
MMBD701LT3G 功能描述:DIODE SCHOTTKY 70V SOT-23 RoHS:是 類別:分離式半導(dǎo)體產(chǎn)品 >> RF 二極管 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 二極管類型:PIN - 單 電壓 - 峰值反向(最大):50V 電流 - 最大:50mA 電容@ Vr, F:0.4pF @ 50V，1MHz 電阻@ Vr, F:4.5 歐姆 @ 10mA，100MHz 功率耗散（最大）:100mW 封裝/外殼:SC-70，SOT-323 供應(yīng)商設(shè)備封裝:3-MCP 包裝:帶卷 (TR)
MMBD717 制造商:PANJIT 制造商全稱:Pan Jit International Inc. 功能描述:SURFACE MOUNT SCHOTTKY DIODES
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