83947AYILNT IDT, 83947AYILNT Datasheet

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83947AYILNT

Manufacturer Part Number
83947AYILNT
Description
Clock Drivers & Distribution
Manufacturer
IDT
Datasheet

Specifications of 83947AYILNT

Rohs
yes
Part # Aliases
ICS83947AYILNT
Block Diagram
LVCMOS_CLK
LOW SKEW, 1-TO-12 DIFFERENTIAL-
TO-LVCMOS/LVTTL FANOUT BUFFER
General Description
The ICS83948I-147 is a low skew, 1-to-12 Differential-to-LVC-
MOS/LVTTL Fanout Buffer. The ICS83948I-147 has two select-
able clock inputs. The CLK, nCLK pair can accept most standard
differential input levels. The LVCMOS_CLK can accept LVCMOS
or LVTTL input levels. The low impedance LVCMOS/LVTTL out-
puts are designed to drive 50 series or parallel terminated trans-
mission lines. The effective fanout can be increased from 12 to 24
by utilizing the ability of the outputs to drive two series terminated
lines.
The ICS83948I-147 is characterized at full 3.3V, full 2.5V or mixed
3.3V core/2.5V output operating supply modes. Guaranteed
output and part-to-part skew characteristics make the
ICS83948I-147 ideal for those clock distribution applications
demanding well defined performance and repeatability.
IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR
CLK_SEL
CLK_EN
nCLK
CLK
OE
1
0
D
Q
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
1
Features
Twelve LVCMOS/LVTTL outputs
Selectable differential CLK/nCLK or LVCMOS/LVTTL clock
input
CLK/nCLK pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
LVCMOS_CLK supports the following input types: LVCMOS,
LVTTL
Output frequency: 350MHz
Additive phase jitter, RMS: 0.14ps (typical)
Output skew: 100ps (maximum), 3.3V±5%
Part-to-part skew: 1ns (maximum), 3.3V±5%
Operating supply modes:
Core/Output
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
LVCMOS_CLK
Pin Assignment
CLK_SEL
CLK_EN
nCLK
7mm x 7mm x 1.4mm package body
GND
CLK
V
OE
DD
1
2
3
4
5
6
7
8
ICS83948AYI-147 REV. D NOVEMBER 1, 2012
32 31 30 29 28 27 26 25
9
10 11 12 13 14 15 16
ICS83948I-147
32-Lead LQFP
Y Package
Top View
ICS83948I-147
24
23
22
21
20
19
18
17
Q4
GND
Q6
GND
V
Q5
V
Q7
DDO
DDO

Related parts for 83947AYILNT

83947AYILNT Summary of contents

Page 1

... CLK_EN D Q LVCMOS_CLK 1 CLK 0 nCLK CLK_SEL OE IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Features • Twelve LVCMOS/LVTTL outputs • Selectable differential CLK/nCLK or LVCMOS/LVTTL clock input • CLK/nCLK pair can accept the following differential input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL • ...

Page 2

... Table 3A. Clock Select Function Table Control Clock Input 0 CLK/nCLK inputs selected 1 LVCMOS_CLK input selected IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Type Description Clock select input. When HIGH, selects LVCMOS_CLK input. Input Pullup When LOW, selects CLK/nCLK inputs. LVCMOS / LVTTL interface levels. Input Pullup Single-ended clock input ...

Page 3

... DDO I Power Supply Current DD Table 4B. Power Supply DC Characteristics, V Symbol Parameter V Positive Supply Voltage DD V Output Supply Voltage DDO I Power Supply Current DD IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Outputs CLK nCLK Q[0:11 LOW 1 0 HIGH 0 Biased; NOTE 1 LOW 1 Biased; NOTE 1 HIGH ...

Page 4

... NOTE 1: Outputs capable of driving 50 See Parameter Measurement section, Output Load AC Test Circuit diagrams. NOTE 2: V should not be less than -0.3V. IL NOTE 3: Common mode voltage is defined as V IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR = 3.3V ± 5 DDO Test Conditions = -40°C to 85°C Test Conditions ...

Page 5

... NOTE 5: These parameters are guaranteed by characterization. Not tested in production. NOTE 6: Setup and Hold times are relative to the rising edge of the input clock. NOTE 7: This parameter is defined in accordance with JEDEC Standard 65. IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR = V = 3.3V ± 5 -40°C to 85°C ...

Page 6

... NOTE 5: These parameters are guaranteed by characterization. Not tested in production. NOTE 6: Setup and Hold times are relative to the rising edge of the input clock. NOTE 7: This parameter is defined in accordance with JEDEC Standard 65. IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR = V = 2.5V ± 5 -40°C to 85°C ...

Page 7

... NOTE 5: These parameters are guaranteed by characterization. Not tested in production. NOTE 6: Setup and Hold times are relative to the rising edge of the input clock. NOTE 7: This parameter is defined in accordance with JEDEC Standard 65. IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR = 3.3V ± 5 2.5V ± 5 ...

Page 8

... Often the noise floor of the equipment is higher than the noise floor of the IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR to the power in the fundamental. When the required offset is specified, the phase noise is called a dBc value, which simply means dBm at a specified offset from the fundamental ...

Page 9

... Core/2.5V LVCMOS Output Load AC Test Circuit Part 1 V DDO Qx 2 Part 2 V DDO Qy 2 tsk(pp) Part-to-Part Skew IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR 1.25V±5% SCOPE V DD, V DDO Qx GND -1.25V±5% 2.5V Core/2.5V LVCMOS Output Load AC Test Circuit V DD SCOPE ...

Page 10

... LOW SKEW, 1-TO-12 DIFFERENTIAL-TO-LVCMOS/LVTTL FANOUT BUFFER Parameter Measurement Information, continued 2V 0.8V Q0:Q11 t R 3.3V Output Rise/Fall Time CLK nCLK CLK V DDO 2 Q0:Q11 t PD Propagation Delay IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR 2V 0.8V Q0:Q11 t F 2.5V Output Rise/Fall Time Q0:Q11 Output Duty Cycle/Pulse Width/Period 10 1.8V 1.8V 0. DDO 2 t ...

Page 11

... LVCMOS Control Pins All control pins have internal pull-ups or pull-downs; additional resistance is not required but can be added for additional protection. A 1k resistor can be used. IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR / Single Ended Clock Input Figure 1. Single-Ended Signal Driving Differential Input ...

Page 12

... Please consult with the vendor of the driver component to and confirm the driver termination requirements. For example, in Figure PP 2A, the input termination applies for IDT open emitter LVHSTL drivers. If you are using an LVHSTL driver from another vendor, use their termination recommendation. 3.3V 3 ...

Page 13

... Air Flow Table for a 32 Lead LQFP JA Meters per Second Multi-Layer PCB, JEDEC Standard Test Boards Transistor Count The transistor count for ICS83948I-147 is: 1040 Pin compatible with the MPC9448 IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR  vs. Air Flow 73.6°C/W 63.9° ...

Page 14

... JEDEC Variation: ABC - HD All Dimensions in Millimeters Symbol Minimum Nominal 0.05 0.10 A2 1.35 1.40 b 0.30 0.37 c 0.09 D & E 9.00 Basic D1 & E1 7.00 Basic D2 & E2 5.60 Ref. e 0.80 Basic L 0.45 0.60  0° ccc Reference Document: JEDEC Publication 95, MS-026 IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Maximum 1.60 0.15 1.45 0.45 0.20 0.75 7° 0.10 14 ICS83948AYI-147 REV. D NOVEMBER 1, 2012 ...

Page 15

... ICS948AI147L 83948AYI-147ILFT ICS948AI147L NOTE: Parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Package Shipping Packaging 32 Lead LQFP 32 Lead LQFP “Lead-Free” 32 Lead LQFP “ ...

Page 16

... T4C 4 T5C IDT™ / ICS™ LVCMOS/LVTTL CLOCK GENERATOR Description of Change Features Section - added Lead-Free bullet. Pin Characteristics Table - changed C   added 5 min. and 12 max to R OUT Updated Single Ended Signal Driving Differential Input diagram. Added Recommendations for Unused Input and Output Pins. ...

Page 17

... IDT or any third parties. IDT’s products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to signif- icantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT. ...

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