MPC9608 Ver la hoja de datos (PDF) - Motorola => Freescale

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Fabricante

MPC9608

1:10 LVCMOS Zero Delay Clock Buffer

Motorola => Freescale 

Freescale Semiconductor, Inc.

MPC9608

TABLE 1. PIN CONFIGURATION

Pin

I/O

Type

CCLK

Input

LVCMOS

FB_IN

Input

LVCMOS

F_RANGE[0:1] Input

LVCMOS

BSEL

Input

LVCMOS

PLL_EN

Input

LVCMOS

OE

Input

LVCMOS

CLK_STOP

Input

LVCMOS

QA0-4, QB0-4 Output

LVCMOS

QFB

Output

LVCMOS

GND

Supply

Ground

VCCA

Supply

VCC

VCC

Supply

VCC

Function

PLL reference clock signal

PLL feedback signal input, connect to a QFB output

PLL frequency range select

Frequency divider select for bank B outputs

PLL enable/disable

Output enable/disable (high-impedance tristate)

Synchronous clock enable/stop

Clock outputs

PLL feedback signal output. Connect to FB_IN

Negative power supply

PLL positive power supply (analog power supply). The MPC9608 requires an external RC filter for

the analog power supply pin VCCA. Refer to the Applications Information section for details.

Positive power supply for I/O and core

TABLE 2. FUNCTION TABLE

Control

Default

0

1

F_RANGE[0:1]

00 PLL frequency range. Refer to Table 3 “Clock frequency configuration for QFB connected to FB_IN”

BSEL

0

fQB0-4 = fQA0-4

fQB0-4 = fQA0-4 ÷ 2

CLK_STOP

0

Outputs enabled

Outputs synchronously stopped in logic low state

OE

0

Outputs enabled (active)

Outputs disabled (high-impedance state), independent on

CLK_STOP. Applying OE = 1 and PLL_EN = 1 resets the device. The

PLL feedback output QFB is not affected by OE.

PLL_EN

0

Normal operation mode with PLL enabled. Test mode with PLL disabled. CCLK is substituted for the internal

VCO output. MPC9608 is fully static and no minimum frequency limit

applies. All PLL related AC characteristics are not applicable.

Applying OE = 1 and PLL_EN = 1 resets the device.

TABLE 3. Clock Frequency Configuration for QFB connected to FB_IN

F_RANGE[0] F_RANGE[1]

0

0

0

0

BSEL

0

1

fREF (CCLK)

range [MHz]

100.0 – 200.0

QA0-QA4

Ratio

fQA0-4 [MHz]

fREF

100.0 – 200.0

0

1

0

50.0 – 100.0

fREF

50.0 – 100.0

0

1

1

1

0

0

25.0 – 50.0

fREF

25.0 – 50.0

1

0

1

1

1

0

12.5 – 25.0

fREF

12.5 – 25

1

1

1

QB0-B4

Ratio

fQB0-4 [MHz]

fREF

100.0 – 200.0

fREF ÷ 2

50.0 – 25.0

fREF

50.0 – 100.0

fREF ÷ 2

25.0 – 50.0

fREF

25.0 – 50.0

fREF ÷ 2

12.5 – 25.0

fREF

12.5 – 25.0

fREF ÷ 2

6.25 – 12.5

QFB

fREF

fREF

fREF

fREF

fREF

fREF

fREF

fREF

TIMING SOLUTIONS

For More Information On This Product,

3

Go to: www.freescale.com

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