Datasheet > MK74CB178R

MK74CB178R

更新时间： 2024-11-25 20:02:03

品牌	Logo	应用领域
艾迪悌 - IDT		驱动光电二极管逻辑集成电路
页数	文件大小	规格书
4页	45K
描述
Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), PDSO28, 0.150 INCH, SSOP-28

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MK74CB178R 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	SSOP,	针数：	28
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.92	其他特性：	ALSO OPERATABLE AT 3.3V NOM
系列：	CB	输入调节：	STANDARD
JESD-30 代码：	R-PDSO-G28	JESD-609代码：	e0
长度：	9.9 mm	逻辑集成电路类型：	LOW SKEW CLOCK DRIVER
功能数量：	2	反相输出次数：
端子数量：	28	实输出次数：	7
最高工作温度：	70 °C	最低工作温度：
输出特性：	3-STATE	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	225
传播延迟（tpd）：	6.5 ns	认证状态：	Not Qualified
Same Edge Skew-Max（tskwd）：	0.25 ns	座面最大高度：	1.75 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	3.9116 mm	Base Number Matches：	1

MK74CB178R 数据手册

MK74CB178

Early Buffalo™ Clock Driver

ICRO CLOC K

Description

Features

The MK74CB178 Early Buffalo™ is a monolithic high speed

clock driver which is ideal for Pentium™, 486, and RISC

processor systems. It consists of three clock drivers capable of

accepting different inputs to produce one, seven and eight low-

skew, non-inverting outputs. The single input/output can be

used to maintain timing with the early CPU clock. When

combined with MicroClock’s MK14xx series of low jitter

clock synthesizers, the two chips form an unequaled high

performance clocking scheme for new processors. This is the

only solution on the market that meets Intel’s specs for skew

and jitter.

• Tiny 28 pin SSOP (150 mil) package

• Single input to single output for early clock

• Single input to seven output for CPU

• Single input to eight output for PCI

• Like outputs are skew matched to within 250ps

• A, B, and C outputs matched to 500ps

• 3.3V±10% and/or 5V±10% supply voltage

• Output Enable tri-states A clock outputs

• Each side (A, B+C) of eight clock drivers can run

from different supply voltages, making it possible

to have 3.3V and 5V amplitude clock outputs

from the same chip

Many new Pentium systems require multiple outputs for CPU

and PCI clocks, plus an early CPU clock for the core logic.

This monolithic solution eliminates any concern for part-to-

part skew matching. The MK74CB178 is packaged in the tiny

28 pin SSOP, which uses the same board space as the narrow

16 pin SOIC. An added feature of the chip is the ability to

produce both 3.3V and 5V amplitude clocks by connecting 5V

to VDDA and 3.3V to VDDBC. See MAN03 for dual voltage

operation.

• Clock speeds up to 66.67 MHz

Family of MicroClock Parts

The MK74CB178 Early Buffalo™ is designed to

be used with MicroClock’s clock synthesizer

devices, which will produce the CPU, memory,

and local bus clocks. MicroClock also makes the

MK74CB216, which is a dual one-to-eight buffer.

Consult MicroClock for applications support.

The MK74CB178 is also useful for Intel’s Triton chipset,

since the C input can be used to delay the PCI clock by 5ns

maximum (at 5V) before driving the A input.

VDDA

VDDBC

Block Diagram

INB

QB0

QB1

INA

QA0

QA1

QA2

QA3

QA4

QA5

QA6

QA7

QB2

QB3

QB4

QB5

QB6

QC0

INC

GNDA

GNDBC

OEA (all A clock outputs)

MDS74CB178B

Revision 4265

Printed 7/23/97

MicroClock Division of ICS•1271 Parkmoor Ave.•San Jose•CA•95126•(408)295-9800tel•(408)295-9818fax

12 3 4

中文翻译

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与MK74CB178R相关器件

型号	品牌	获取价格	描述	数据表
MK74CB178RTR	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), PDSO28, 0.150 IN
MK74CB178RTRLF	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), PDSO28, 0.150 IN
MK74CB214	ICSI	获取价格	Dual 1 to 7 Buffalo⑩ Clock Driver
MK74CB214R	ICSI	获取价格	Dual 1 to 7 Buffalo⑩ Clock Driver
MK74CB214R	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), CMOS, PDSO20, 0.
MK74CB214RLF	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), CMOS, PDSO20, 0.
MK74CB214RLFTR	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), CMOS, PDSO20, 0.
MK74CB214RTR	ICSI	获取价格	Dual 1 to 7 Buffalo⑩ Clock Driver
MK74CB214RTR	IDT	获取价格	Low Skew Clock Driver, CB Series, 7 True Output(s), 0 Inverted Output(s), CMOS, PDSO20, 0.
MK74CB216R	IDT	获取价格	Low Skew Clock Driver, CB Series, 8 True Output(s), 0 Inverted Output(s), CMOS, PDSO28, 0.

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