参数资料
型号: ICS8534BMI-13LFT
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟产生/分配
英文描述: 266 MHz, OTHER CLOCK GENERATOR, PDSO16
封装: 3.90 X 9.90 MM, 1.375 MM HEIGHT, ROHS COMPLIANT, MS-012, SOIC-16
文件页数: 3/16页
文件大小: 1041K
代理商: ICS8534BMI-13LFT
IDT / ICS 3.3V LVPECL/LVCMOS FANOUT BUFFER
11
ICS8534BMI-13 REV. A NOVEMBER 15, 2006
ICS8534I-13
1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL/LVCMOS FANOUT BUFFER
PRELIMINARY
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS8534I-13.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS8534I-13 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
CC
= 3.3V + 5% = 3.465V, which gives worst case results.
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
Power (core)
MAX
= V
CC_MAX
* I
EE_MAX
= 3.465V * 60mA = 207.9mW
Power (outputs)
MAX
= 30mW/Loaded Output pair
Total Power
_MAX
(3.465V, with all outputs switching) = 207.9mW + 30mW = 237.9mW
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad and directly affects the reliability of the
device. The maximum recommended junction temperature for HiPerClockS
TM devices is 125°C.
The equation for Tj is as follows: Tj =
θ
JA * Pd_total + TA
Tj = Junction Temperature
θ
JA = Junction-to-Ambient Thermal Resistance
Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)
T
A = Ambient Temperature
In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance
θ
JA must be used. Assuming a
moderate air flow of 200 linear feet per minute and a multi-layer board, the appropriate value is 82°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.238W * 82°C/W = 104.5°C. This is well below the limit of 125°C.
This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow,
and the type of board (single layer or multi-layer).
TABLE 7. THERMAL RESISTANCE
θθθθθ
JA
FOR
16-PIN SOIC, FORCED CONVECTION
θθθθθ
JA
by Velocity (Linear Feet per Minute)
0
200
500
Multi-Layer PCB, JEDEC Standard Test Boards
90°C/W
82°C/W
78°C/W
相关PDF资料
PDF描述
ICS8534BMI-13T 266 MHz, OTHER CLOCK GENERATOR, PDSO16
ICS8534BMI-13 266 MHz, OTHER CLOCK GENERATOR, PDSO16
ICS85352AYILFT 85352 SERIES, LOW SKEW CLOCK DRIVER, 12 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48
ICS85354AK-01 85354 SERIES, 2 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, QCC16
ICS85356AMILFT LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
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