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PCD50922H Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer PCD50922H
Beschreibung Low cost; low power DECT baseband controllers ABC-PRO
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 16 Seiten
PCD50922H Datasheet, Funktion
INTEGRATED CIRCUITS
DATA SHEET
PCD509x2/zuu/v family
Low cost; low power DECT
baseband controllers (ABC-PRO)
Objective specification
File under Integrated Circuits, IC17
1998 Apr 27






PCD50922H Datasheet, Funktion
Philips Semiconductors
Low cost; low power DECT baseband
controllers (ABC-PRO)
5 PINNING INFORMATION
5.1 Pinning
andbook, full pagewidth
Objective specification
PCD509x2/zuu/v family
P1.1/INT3 1
P1.0/INT2 2
M_RESET 3
ANT_SW0 4
ANT_SW1 5
T_ENABLE 6
T_PWR 7
GPP 8
S_ENABLE 9
S_DATA 10
S_CLK 11
S_PWR 12
R_ENABLE 13
R_PWR 14
SLICE_CTR 15
VDD(RF) 16
VSS(RF) 17
REF_CLK 18
RSSI_AN 19
T_GSMK/T_DATA 20
PCD509x2/zuu/v
60 P0.2
59 P0.3
58 P0.4
57 P0.5
56 P0.6
55 P0.7
54 ALE
53 PSEN
52 VDD(P0, P2)
51 VSS(P0, P2)
50 A16
49 P2.7
48 P2.6
47 P2.5
46 P2.4
45 P2.3
44 P2.2
43 P2.1
42 P2.0
41 VSS(BZ)
MGM857
Fig.2 Pin configuration (LQPF80).
1998 Apr 27
6

6 Page









PCD50922H pdf, datenblatt
Philips Semiconductors
Low cost; low power DECT baseband
controllers (ABC-PRO)
Objective specification
PCD509x2/zuu/v family
8 SOLDERING
8.1 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 “Data Handbook IC26; Integrated Circuit Packages”
(order code 9398 652 90011).
8.2 Reflow soldering
Reflow soldering techniques are suitable for all LQFP
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 methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating, soldering and cooling) vary
between 50 and 300 seconds depending on heating
method. Typical reflow peak temperatures range from
215 to 250 °C.
8.3 Wave soldering
Wave soldering is not recommended for LQFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
If wave soldering cannot be avoided, for LQFP
packages with a pitch (e) larger than 0.5 mm, the
following conditions must be observed:
A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
The footprint must be at an angle of 45° to the board
direction and must incorporate solder thieves
downstream and at the side corners.
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.
8.4 Repairing 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.
CAUTION
Wave soldering is NOT applicable for all LQFP
packages with a pitch (e) equal or less than 0.5 mm.
1998 Apr 27
12

12 Page





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