参数资料
型号: SC16C852VIET,157
厂商: NXP Semiconductors
文件页数: 46/55页
文件大小: 0K
描述: IC UART DUAL W/FIFO 36TFBGA
产品培训模块: Stand-Alone UARTs
标准包装: 2,450
特点: 可编程
通道数: 2,DUART
FIFO's: 128 字节
规程: RS485
电源电压: 2.5V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 36-TFBGA
供应商设备封装: 36-TFBGA(3.5x3.5)
包装: 托盘
其它名称: 568-4019
935282518157
SC16C852VIET
SC16C852VIET-ND
SC16C852V
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 21 January 2011
50 of 55
NXP Semiconductors
SC16C852V
Dual UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface
12.4 Reflow soldering
Key characteristics in reflow soldering are:
Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see Figure 24) than a SnPb process, thus
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 40 and 41
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 Figure 24.
Table 40.
SnPb eutectic process (from J-STD-020C)
Package thickness (mm)
Package reflow temperature (
°C)
Volume (mm3)
< 350
≥ 350
< 2.5
235
220
≥ 2.5
220
Table 41.
Lead-free process (from J-STD-020C)
Package thickness (mm)
Package reflow temperature (
°C)
Volume (mm3)
< 350
350 to 2000
> 2000
< 1.6
260
1.6 to 2.5
260
250
245
> 2.5
250
245
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