MPC905

更新时间： 2024-09-23 22:51:11

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		时钟发生器 PC
页数	文件大小	规格书
6页	95K
描述
1:6 PCI CLOCK GENERATOR/ FANOUT BUFFER

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数据手册

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MPC905 数据手册

SEMICONDUCTOR TECHNICAL DATA

The MPC903, MPC904 and MPC905 are six output clock generation

devices targeted to provide the clocks required in a 3.3V or 5.0V PCI

environment. The device operates from a 3.3V supply and can interface

to either a TTL input or an external crystal. The inputs to the device can be

1:6 PCI

CLOCK GENERATOR/

FANOUT BUFFER

driven with 5.0V when the V

is at 3.3V. The outputs of the

MPC903/904/905 meet all of the specifications of the PCI standard. The

three devices are identical except in the function of the Output Enables.

• Six Low Skew Outputs

• Synchronous Output Enables for Power Management

• Low Voltage Operation

• XTAL Oscillator Interface

• 16-Lead SOIC Package

• 5.0V Tolerant Enable Inputs

The MPC903/904/905 device is targeted for PCI bus or processor bus

environments with up to 12 clock loads. Each of the six outputs on the

MPC903/904/905 can drive two series terminated 50Ω transmission

lines. This capability effectively makes the MPC903/904/905 a 1:12

fanout buffer.

D SUFFIX

PLASTIC SOIC PACKAGE

CASE 751B-05

The MPC903 offers two synchronous enable inputs to allow users

flexibility in developing power management features for their designs.

Both enable signals are active HIGH inputs. A logic ‘0’ on the Enable1

input will pull all of the outputs into the logic ‘0’ state and shut down the

internal oscillator for a zero power sleep state. A logic ‘0’ on the Enable2

input will disable only the BCLK5 output. The Enable2 input can be used to disable any high power device for system power

savings during periods of inactivity. Both enable inputs are synchronized internal to the chip so that the output disabling will

happen only when the outputs are already LOW. This feature guarantees no runt pulses will be generated during enabling and

disabling. Note that when the MPC903 is re-enabled via the Enable1 pin, the user must allow for the oscillator to regain stability.

Thus, the re-enabling of the chip cannot occur instantaneously. The MPC904 and MPC905 Enable functions are slightly different

than the 903 and are outlined in the function tables on the following page.

(3)

GND (3)

Pinout: 16-Lead Plastic Package (Top View)

BCLK0

BCLK1

BCLK2

BCLK3

BCLK4

BCLK5

XTAL_OUT

Enable2

GND1

XTAL_IN

Enable1

BCLK5

XTAL_IN

BCLK0

DD3

XTAL_OUT

Enable1

BCLK4

GND3

BCLK3

DD1

BCLK1

GND2

BCLK2

SYNCHRONIZE

Enable2

DD2

10/96

Motorola, Inc. 1996

REV 3

12 3 4 5 6

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与MPC905相关器件

型号	品牌	获取价格	描述	数据表
MPC905D	MOTOROLA	获取价格	50MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO16, PLASTIC, SOIC-16
MPC905DR2	IDT	获取价格	Processor Specific Clock Generator, 50MHz, PDSO16, PLASTIC, SOIC-16
MPC905DR2	MOTOROLA	获取价格	50MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO16, PLASTIC, SOIC-16
MPC905EF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO16, LEAD FREE, PLASTIC, SOIC-16
MPC905EF	NXP	获取价格	100MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO16, PLASTIC, SOIC-16
MPC905EFR2	IDT	获取价格	Processor Specific Clock Generator, 50MHz, PDSO16, PLASTIC, SOIC-16
MPC909	MOTOROLA	获取价格	LOW VOLTAGE CMOS 1:18 CLOCK DISTRIBUTION CHIP
MPC909FA	MOTOROLA	获取价格	100MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32
MPC90N06	MCC	获取价格	Power Field-Effect Transistor, 100A I(D), 55V, 0.0105ohm, 1-Element, N-Channel, Silicon, M
MPC9100	MOTOROLA	获取价格	DUAL PLL CLOCK GENERATOR

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