PCK9447BD,157 NXP Semiconductors, PCK9447BD,157 Datasheet

IC FANOUT BUFFER 1:9 32LQFP

PCK9447BD,157

Manufacturer Part Number
PCK9447BD,157
Description
IC FANOUT BUFFER 1:9 32LQFP
Manufacturer
NXP Semiconductors
Type
Fanout Buffer (Distribution), Multiplexerr
Datasheet

Specifications of PCK9447BD,157

Number Of Circuits
1
Ratio - Input:output
2:9
Differential - Input:output
No/No
Input
LVCMOS
Output
LVCMOS
Frequency - Max
350MHz
Voltage - Supply
2.375 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-LQFP
Frequency-max
350MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-3565
935280283157
PCK9447BD

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Part Number
Manufacturer
Quantity
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Part Number:
PCK9447BD,157
Manufacturer:
NXP Semiconductors
Quantity:
10 000
1. General description
2. Features
The PCK9447 is a 3.3 V or 2.5 V compatible, 1 : 9 clock fan-out buffer targeted for high
performance clock tree applications. With output frequencies up to 350 MHz, and output
skews less than 150 ps, the device meets the needs of most demanding clock
applications.
The PCK9447 is specifically designed to distribute LVCMOS compatible clock signals up
to a frequency of 350 MHz. Each output provides a precise copy of the input signal with
near zero skew. The output buffers support driving of 50
on the incident edge: each is capable of driving either one parallel terminated or two
series terminated transmission lines.
Two selectable independent LVCMOS compatible clock inputs are available, providing
support of redundant clock source systems. The PCK9447 CLK_STOP control is
synchronous to the falling edge of the input clock. It allows the start and stop of the output
clock signal only in a logic LOW state, thus eliminating potential output runt pulses.
Applying the OE control will force the outputs into high-impedance mode.
All inputs have an internal pull-up or pull-down resistor preventing unused and open inputs
from floating. The device supports a 2.5 V or 3.3 V power supply and an ambient
temperature range of 40 C to +85 C. The PCK9447 is pin and function compatible but
performance-enhanced to the PCK947.
PCK9447
3.3 V/2.5 V 1 : 9 LVCMOS clock fan-out buffer
Rev. 01 — 13 October 2005
9 LVCMOS compatible clock outputs
2 selectable, LVCMOS compatible inputs
Maximum clock frequency of 350 MHz
Maximum clock skew of 150 ps
Synchronous output stop in logic LOW state eliminates output runt pulses
High-impedance output control
3.3 V or 2.5 V power supply
Drives up to 18 series terminated clock lines
T
Available in LQFP32 package
Supports clock distribution in networking, telecommunications and computer
applications
Pin and function compatible to PCK947
amb
= 40 C to +85 C
Product data sheet
terminated transmission lines

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PCK9447BD,157 Summary of contents

Page 1

PCK9447 3.3 V/2 LVCMOS clock fan-out buffer Rev. 01 — 13 October 2005 1. General description The PCK9447 2.5 V compatible clock fan-out buffer targeted for high performance ...

Page 2

Philips Semiconductors 3. Ordering information Table 1: Type number PCK9447BD 4. Functional diagram Fig 1. Functional diagram of PCK9447 9397 750 12522 Product data sheet Ordering information Package Name Description LQFP32 plastic low profile quad flat package; 32 leads; body ...

Page 3

Philips Semiconductors 5. Pinning information 5.1 Pinning Fig 2. Pin configuration for LQFP32 5.2 Pin description Table 2: Symbol CCLK0 CCLK1 CLK_SEL CLK_STOP GND V CC 9397 750 12522 Product data sheet GND 1 2 CLK_SEL ...

Page 4

Philips Semiconductors 6. Functional description 6.1 Function table Table 3: Control CLK_SEL OE CLK_STOP [ will high-impedance 3-state all outputs independent of CLK_STOP. 7. Limiting values Table 4: In accordance with the Absolute Maximum Rating System (IEC ...

Page 5

Philips Semiconductors 8.2 Static characteristics Table 6: Static characteristics (3 + 3.3 V amb CC Symbol Parameter V HIGH-state input voltage IH V LOW-state input voltage IL V HIGH-state output voltage ...

Page 6

Philips Semiconductors 8.3 Dynamic characteristics Table 8: Dynamic characteristics (3 + 3.3 V amb CC Symbol Parameter f input frequency i f output frequency o t reference input pulse width W(i)(ref) ...

Page 7

Philips Semiconductors Table 9: Dynamic characteristics (2 + 2.5 V amb CC Symbol Parameter f input frequency i f output frequency o t reference input pulse width W(i)(ref ...

Page 8

Philips Semiconductors CCLK Fig 5. Propagation delay (t ) test reference PD t sk(o) The pin-to-pin skew is defined as the worst-case difference in propagation delay between any similar delay path within a single device. Fig 7. ...

Page 9

Philips Semiconductors 9. Application information 9.1 Driving transmission lines The PCK9447 clock driver was designed to drive high-speed signals in a terminated transmission line environment. To provide the optimum flexibility to the user the output drivers were designed to exhibit ...

Page 10

Philips Semiconductors 3 the load end the voltage will double, due to the near unity reflection coefficient will then increment ...

Page 11

Philips Semiconductors 10. Test information Fig 14. CCLK AC test reference for V 9397 750 12522 Product data sheet 3.3 V/2 LVCMOS clock fan-out buffer PCK9447 D.U. PULSE GENERATOR ...

Page 12

Philips Semiconductors 11. Package outline LQFP32: plastic low profile quad flat package; 32 leads; body 1 pin 1 index DIMENSIONS (mm are the original dimensions) ...

Page 13

Philips Semiconductors 12. Soldering 12.1 Introduction to soldering surface mount packages This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages ...

Page 14

Philips Semiconductors – smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves at the downstream end. • For packages with leads on four sides, ...

Page 15

Philips Semiconductors [3] These transparent plastic packages are extremely sensitive to reflow soldering conditions and must on no account be processed through more than one soldering cycle or subjected to infrared reflow soldering with peak temperature exceeding 217 C body ...

Page 16

Philips Semiconductors 15. Data sheet status [1] Level Data sheet status Product status I Objective data Development II Preliminary data Qualification III Product data Production [1] Please consult the most recently issued data sheet before initiating or completing a design. ...

Page 17

Philips Semiconductors 20. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...

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