PCA9674BS,118 NXP Semiconductors, PCA9674BS,118 Datasheet - Page 28

• Manufacturer Part Number: PCA9674BS,118
• Description: IC I/O EXPANDER I2C 8B 16HVQFN
• Manufacturer: NXP Semiconductors

Specifications of PCA9674BS,118

• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Interface: I²C
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 1MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Includes: POR
• Logic Family: PCA9674
• Number Of Lines (input / Output): 8.0 / 8.0
• Operating Supply Voltage: 2.3 V to 5.5 V
• Power Dissipation: 400 mW
• Operating Temperature Range: - 40 C to + 85 C
• Input Voltage: 5.5 V
• Logic Type: I/O Expander
• Maximum Clock Frequency: 1 MHz
• Mounting Style: SMD/SMT
• Number Of Input Lines: 8.0
• Number Of Output Lines: 8.0
• Output Current: 50 mA
• Output Voltage: 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-4222-2; 935282738118; PCA9674BS-T; PCA9674BS-T

NXP Semiconductors
PCA9674_PCA9674A_5
Product data sheet
16.4 Reflow soldering
Key characteristics in reflow soldering are:
Table 10.
Table 11.
Moisture sensitivity precautions, as indicated on the packing, must be respected at all
times.
Studies have shown that small packages reach higher temperatures during reflow
soldering, see
Package thickness (mm)
< 2.5
Package thickness (mm)
< 1.6
1.6 to 2.5
> 2.5
•
•
•
•
•
2.5
Process issues, such as application of adhesive and flux, clinching of leads, board
transport, the solder wave parameters, and the time during which components are
exposed to the wave
Solder bath specifications, including temperature and impurities
Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see
reducing the process window
Solder paste printing issues including smearing, release, and adjusting the process
window for a mix of large and small components on one board
Reflow temperature profile; this profile includes preheat, reflow (in which the board is
heated to the peak temperature) and cooling down. It is imperative that the peak
temperature is high enough for the solder to make reliable solder joints (a solder paste
characteristic). In addition, the peak temperature must be low enough that the
packages and/or boards are not damaged. The peak temperature of the package
depends on package thickness and volume and is classified in accordance with
Table 10
SnPb eutectic process (from J-STD-020C)
Lead-free process (from J-STD-020C)
and
Figure
11
27.
Rev. 05 — 15 June 2009
Package reflow temperature ( C)
Volume (mm
< 350
235
220
Package reflow temperature ( C)
Volume (mm
< 350
260
260
250
Remote 8-bit I/O expander for Fm+ I
3
3
)
)
Figure
350 to 2000
260
250
245
27) than a SnPb process, thus
220
220
350
PCA9674/74A
2
C-bus with interrupt
> 2000
260
245
245
© NXP B.V. 2009. All rights reserved.
28 of 32