SC16C2550BIA44 NXP Semiconductors, SC16C2550BIA44 Datasheet - Page 38

• Manufacturer Part Number: SC16C2550BIA44
• Description: UART, 2 CH, 16BYTE FIFO, 16C2550
• Manufacturer: NXP Semiconductors

Specifications of SC16C2550BIA44

• Data Rate: 5Mbps
• Transmit Fifo: 16Byte
• Receive Fifo: 16Byte
• Transmitter And Receiver Fifo Counter: Yes
• Package Type: PLCC
• Operating Supply Voltage (max): 5.5V
• Mounting: Surface Mount
• Pin Count: 44
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Number Of Channels: 2
• No. Of Channels: 2
• Supply Voltage Range: 2.25V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: PLCC
• No. Of Pins: 44
• Svhc: No SVHC (18-Jun-2010)
• Operating: RoHS Compliant
• Uart Features: Independent Transmit & Receive UART Control, Software Selectable Baud Rate Generator
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
SC16C2550B_5
Product data sheet
12.4 Reflow soldering
Key characteristics in reflow soldering are:
Table 26.
Table 27.
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
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 26
SnPb eutectic process (from J-STD-020C)
Lead-free process (from J-STD-020C)
and
Figure
27
5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
22.
Rev. 05 — 12 January 2009
Package reflow temperature ( C)
Volume (mm
< 350
235
220
Package reflow temperature ( C)
Volume (mm
< 350
260
260
250
3
3
)
)
Figure
350 to 2000
260
250
245
22) than a SnPb process, thus
220
220
350
SC16C2550B
> 2000
260
245
245
© NXP B.V. 2009. All rights reserved.
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