- 您现在的位置：买卖IC网 > PDF目录67704 > ICS889474AKLFT (INTEGRATED DEVICE TECHNOLOGY INC) 889474 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC24 PDF资料下载
参数资料
| 型号： | ICS889474AKLFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟及定时 |
| 英文描述： | 889474 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC24 |
| 封装： | 4 X 4 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, MO-220, VFQFN-24 |
| 文件页数： | 2/14页 |
| 文件大小： | 295K |
| 代理商： | ICS889474AKLFT |
IDT / ICS LVDS MULTIPLEXER
10
ICS889474AK REV. A MARCH 7, 2007
ICS889474
2:1 LVDS MULTIPLEXER WITH 1:2 FANOUT AND INTERNAL TERMINATION
PRELIMINARY
θθθθθ
JA
vs. 0 Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
49.5°C/W
43.3°C/W
38.8°C/W
TABLE 6. THERMAL RESISTANCE
θθθθθ
JA
FOR
24-PIN VFQFN, FORCED CONVECTION
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS889474.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS889474 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
DD
= 2.625V, which gives worst case results.
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
Power (core)
MAX
= V
DD_MAX
* I
DD_MAX
= 2.625V * 60mA = 157.5mW
Power (outputs)
MAX
= 30.94mW/Loaded Output pair
If all outputs are loaded, the total power is 2 * 30.94mW = 61.88mW
Power Dissipation at built-in terminations: Assume the input is driven by a 2.5V SSTL driver as shown in Figure 1E and
estimated approximately 1.75V drop across IN and nIN.
Total Power Dissipation for the two 50
Ω built-in terminations is: (1.75V)2 / (50Ω + 50Ω) = 30.6mW
Input pair for both inputs is 2 * 30.6mW = 61.2mW
Total Power
_MAX
(2.625V, with all outputs switching) = 157.5mW + 61.88mW + 61.2mW = 280.58mW
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 1 meter per second and a multi-layer board, the appropriate value is 43.3°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.281W * 43.3°C/W = 97.2°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).
相关PDF资料 |
PDF描述 |
|---|---|
| ICS889831AKLFT | 889831 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC16 |
| ICS889834AK | 889834 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 4 INVERTED OUTPUT(S), QCC16 |
| ICS889834AKLFT | 889834 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 4 INVERTED OUTPUT(S), QCC16 |
| ICS889834AKT | 889834 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 4 INVERTED OUTPUT(S), QCC16 |
| ICS889871AKLF | 889871 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS889831AKLF | 功能描述:IC CLK BUFF 1:4 2.1GHZ 16-VFQFPN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:HiPerClockS™ 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| ICS889831AKLFT | 功能描述:IC CLK BUFF 1:4 2.1GHZ 16-VFQFPN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:HiPerClockS™ 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| ICS889832AKLF | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:HiPerClockS™ 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| ICS889832AKLFT | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:HiPerClockS™ 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| ICS889833AKLF | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:HiPerClockS™ 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
发布紧急采购，3分钟左右您将得到回复。