MC100ES6221 datasheet(8/12 Pages) FREESCALE

Numer części	MC100ES6221

Szczegółowy opis	Low Voltage 1:20 Differential ECL/PECL/HSTL Clock Fanout Buffer

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Advanced Clock Drivers Devices

8

Freescale Semiconductor

MC100ES6221

APPLICATIONS INFORMATION

Understanding the Junction Temperature Range of the

MC100ES6221

To make the optimum use of high clock frequency and low

skew capabilities of the MC100ES6221, the MC100ES6221

is specified, characterized and tested for the junction

temperature range of TJ =0°C to +110°C. Because the exact

thermal performance depends on the PCB type, design,

thermal management and natural or forced air convection,

the junction temperature provides an exact way to correlate

the application specific conditions to the published

performance data of this data sheet. The correlation of the

junction temperature range to the application ambient

temperature range and vice versa can be done by

calculation:

TJ = TA + Rthja ⋅ Ptot

Assuming a thermal resistance (junction to ambient) of

17

°C/W (2s2p board, 200 ft/min airflow, see Table 8) and a

typical power consumption of 1148 mW (all outputs

terminated 50 ohms to VTT, VCC = 3.3 V, frequency

independent), the junction temperature of the MC100ES6221

is approximately TA + 21°C, and the minimum ambient

temperature in this example case calculates to –21

°C (the

maximum ambient temperature is 89

°C. See Table 8).

Exceeding the minimum junction temperature specification of

the MC100ES6221 does not have a significant impact on the

device functionality. However, the continuous use the

MC100ES6221 at high ambient temperatures requires

thermal management to not exceed the specified maximum

junction temperature. Please see the application note

AN1545 for a power consumption calculation guideline.

Maintaining Lowest Device Skew

The MC100ES6221 guarantees low output-to-output bank

skew of 50 ps and a part-to-part skew of max. 270 ps. To

ensure low skew clock signals in the application, both outputs

of any differential output pair need to be terminated

identically, even if only one output is used. When fewer than

all nine output pairs are used, identical termination of all

output pairs within the output bank is recommended. This will

reduce the device power consumption while maintaining

minimum output skew.

Power Supply Bypassing

The MC100ES6221 is a mixed analog/digital product. The

differential architecture of the MC100ES6221 supports low

noise signal operation at high frequencies. In order to

maintain its superior signal quality, all VCC pins should be

bypassed by high-frequency ceramic capacitors connected

to GND. If the spectral frequencies of the internally generated

switching noise on the supply pins cross the series resonant

point of an individual bypass capacitor, its overall impedance

begins to look inductive and thus increases with increasing

frequency. The parallel capacitor combination shown ensures

that a low impedance path to ground exists for frequencies

well above the noise bandwidth.

Figure 5. VCC Power Supply Bypass

Table 8. Ambient Temperature Ranges (Ptot = 1148 mW)

Rthja (2s2p board)

TA, min

(1)

1. The MC100ES6221 device function is guaranteed from

TA = –40°C to TJ = 110°C

TA, max

Natural convection

20

°C/W

–23

°C87°C

100 ft/min

18

°C/W

–21

°C89°C

200 ft/min

17

°C/W

–20

°C90°C

400 ft/min

16

°C/W

–18

°C92°C

800 ft/min

15

°C/W

–17

°C93°C

VCC

MC100ES6221

VCC

33...100 nF

0.1 nF

Podobny numer części - MC100ES6221

Producent	Numer części	Arkusz danych	Szczegółowy opis
Renesas Technology Corp	MC100ES6221	684Kb / 13P	Low Voltage 1:20 Differential ECL/PECL/HSTL Clock Fanout Buffer 2019

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Podobny opis - MC100ES6221

Producent	Numer części	Arkusz danych	Szczegółowy opis
Renesas Technology Corp	MC100ES6221	684Kb / 13P	Low Voltage 1:20 Differential ECL/PECL/HSTL Clock Fanout Buffer 2019
	8T33FS6221	1Mb / 23P	Low Voltage 1:20 Differential PECL/HSTL Clock Fanout Buffer Apr 8, 2021
	MC100ES6210	546Kb / 11P	Low Voltage 2.5V/3.3V Differential ECL/ PECL/HSTL Fanout Buffer 2019
Freescale Semiconductor...	MC100ES6210	226Kb / 8P	Low Voltage 2.5/3.3 V Differential ECL/PECL/HSTL Fanout Buffer
Freescale Semiconductor...	MC100ES6220	296Kb / 12P	Low Voltage Dual 1:10 Differential ECL/PECL Clock Fanout Buffer
Semtech Corporation	SK100EP111	100Kb / 4P	Low-Voltage 1:10 Differential ECL/PECL/HSTL Clock Driver
Semtech Corporation	SK10EP111	100Kb / 4P	Low-Voltage 1:10 Differential ECL/PECL/HSTL Clock Driver
Motorola, Inc	MC100ES8111	174Kb / 12P	Low Voltage 1:10 Differential HSTL Clock Fanout Buffer
Motorola, Inc	MC100ES6222	300Kb / 12P	Low Voltage 1:15 Differential ECL/PECL Clock Divider and Fanout Buffer
Renesas Technology Corp	MC100ES8111	948Kb / 13P	Low Voltage, 1:10 Differential HSTL Clock Fanout Buffer 2019

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