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參數(shù)資料
| 型號： | PCF8591PN |
| 元件分類： | Codec |
| 英文描述： | CODEC， Single |
| 中文描述： | 編解碼器，單 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大小： | 179K |
| 代理商： | PCF8591PN |
1997 Feb 13
19
Philips Semiconductors
Product specification
256 to 1024
×
8-bit CMOS EEPROMs with
I
2
C-bus interface
PCF85xxC-2 family
15 SOLDERING
15.1
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook”(order code 9398 652 90011).
15.2
DIP
15.2.1
S
OLDERING BY DIPPING OR BY WAVE
The maximum permissible temperature of the solder is
260
°
C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
stg max
). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
15.2.2
R
EPAIRING SOLDERED JOINTS
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300
°
C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400
°
C, contact may be up to 5 seconds.
15.3
SO
15.3.1
R
EFLOW SOLDERING
Reflow soldering techniques are suitable for all SO
packages.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250
°
C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45
°
C.
15.3.2
W
AVE SOLDERING
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
The longitudinal axis of the package footprint must be
parallel to the solder flow.
The package footprint must incorporate solder thieves at
the downstream end.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260
°
C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150
°
C within
6 seconds. Typical dwell time is 4 seconds at 250
°
C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
15.3.3
R
EPAIRING SOLDERED JOINTS
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300
°
C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320
°
C.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCF8591TD | CODEC， Single |
| PCF8591TD-T | CODEC， Single |
| PCF8593TD-T | Real-Time Clock |
| PCF8594C2D | SERIAL EEPROM|512X8|CMOS|SOP|8PIN|PLASTIC |
| PCF8594C2N | I2C Serial EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8591T | 制造商:NXP Semiconductors 功能描述:Codec General Purpose 1-CH 8Bit 3.3V/5V 16-Pin SO Bulk |
| PCF8591T/2,512 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ADC/DAC 8-BIT I2C RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| PCF8591T/2,512 | 制造商:NXP Semiconductors 功能描述:IC, 8-BIT A/D AND D/A CONVERTER, SOIC-16 |
| PCF8591T/2,518 | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 8 BIT ADC/DAC I2C RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝: |
| PCF8591T/2512 | 制造商:NXP Semiconductors 功能描述:IC 8-BIT A/D AND D/A CONVERTER SOIC-16 制造商:NXP Semiconductors 功能描述:ADC DAC 8BIT I2C 16SOIC |
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