TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 49
TX4939XBG-400
Manufacturer Part Number
TX4939XBG-400
Description
Manufacturer
Toshiba
Datasheet
1.TX4939XBG-400.pdf
(740 pages)
Specifications of TX4939XBG-400
Cpu Core
TX49/H4 90nm
Clock Mhz/max Mips
400/520
Inst./data Cache
32KB (4 Way)/32KB (4 Way)
Tlb
x
1cycle Mac
x
Volts (v)
1.25/2.5/3.3
Peripherals
DDR, NAND, ATA, ETHERNET, SECURITY, FPU, MMU, SPI, I2S, I2C, PCI, VIDEO, UART, TIMER, RTC
Companion Chip
TC86C001FG
Package
PGBA456
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3.5.3
3.5.4
The soldering temperature and heating time vary from device to device. Therefore, when specifying the
mounting conditions, refer to the individual datasheets and databooks for the devices used.
(1) Using medium infrared ray reflow
(2) Using hot air reflow
(1) When cleaning circuit boards to remove flux, make sure that no residual reactive ions such as Na or Cl
(2) Washing devices with water will not cause any problems. However, make sure that no reactive ions such as
•
•
•
•
•
Heating top and bottom with long or medium infrared rays is recommended (see Figure 3).
Complete the infrared ray reflow process for 30 to 50 seconds at a package surface temperature of between
230°C and 260°C.
Refer to Figure 4 for an example of a good temperature profile for infrared or hot air reflow.
Complete hot air reflow for 30 to 50 seconds at a package surface temperature of between 230°C and 260°C.
For an example of a recommended temperature profile, refer to Figure 4 above.
Soldering temperature profile
Flux cleaning and ultrasonic cleaning
remain. Note that organic solvents react with water to generate hydrogen chloride and other corrosive gases
which can degrade device performance.
sodium and chlorine are left as a residue. Also, be sure to dry devices sufficiently after washing.
Figure 4 Sample temperature profile (Pb free) for infrared or hot air reflow
Figure 3 Heating top and bottom with long or medium infrared rays
Product flow
Long infrared ray heater (preheating)
(°C)
260
230
190
180
3 General Safety Precautions and Usage Considerations
60-120 s
3-13
Time (s)
Medium infrared ray heater
(reflow)
30-50 s
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