ICS8735AY-31LF IDT, Integrated Device Technology Inc, ICS8735AY-31LF Datasheet

IC CLK GEN ZD DIFF-LVPECL 32LQFP

ICS8735AY-31LF

Manufacturer Part Number
ICS8735AY-31LF
Description
IC CLK GEN ZD DIFF-LVPECL 32LQFP
Manufacturer
IDT, Integrated Device Technology Inc
Series
HiPerClockS™r
Type
Clock Generatorr
Datasheet

Specifications of ICS8735AY-31LF

Pll
Yes with Bypass
Input
HCSL, LVDS, LVHSTL, LVPECL, SSTL
Output
LVPECL
Number Of Circuits
1
Ratio - Input:output
2:5
Differential - Input:output
Yes/Yes
Frequency - Max
350MHz
Divider/multiplier
Yes/Yes
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
32-LQFP
Frequency-max
350MHz
Number Of Elements
1
Supply Current
150mA
Pll Input Freq (min)
15.625MHz
Pll Input Freq (max)
700MHz
Operating Supply Voltage (typ)
3.3V
Operating Temp Range
0C to 70C
Package Type
LQFP
Output Frequency Range
Up to 350MHz
Operating Supply Voltage (min)
3.135V
Operating Supply Voltage (max)
3.465V
Operating Temperature Classification
Commercial
Pin Count
32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
800-1208
8735AY-31LF

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ICS8735AY-31LF
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
Part Number:
ICS8735AY-31LFT
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
Block Diagram
1:5, DIFFERENTIAL-TO-3.3V LVPECL
ZERO DELAY CLOCK GENERATOR
General Description
delay buffer, multiplier or divider, and has an output frequency
range of 15.625MHz to 350MHz. The reference divider, feedback
divider and output divider are each programmable, thereby
allowing for the following output-to-input frequency ratios: 8:1, 4:1,
2:1, 1:1, 1:2, 1:4, 1:8. The external feedback allows the device to
achieve “zero delay” between the input clock and the output
clocks. The PLL_SEL pin can be used to bypass the PLL for
system test and debug purposes. In bypass mode, the reference
clock is routed around the PLL and into the internal output
dividers.
PLL_SEL
IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR
CLK_SEL
HiPerClockS™
nFB_IN
ICS
nCLK0
nCLK1
FB_IN
SEL0
SEL2
SEL3
CLK0
CLK1
SEL1
MR
Pullup
Pulldown
Pullup
Pulldown
Pullup
Pulldown
Pulldown
Pullup
Pulldown
Pulldown
Pulldown
Pulldown
Pulldown
The ICS8735-31 is a highly versatile 1:5 Differential
-to-3.3V LVPECL Clock Generator and a member of
the HiPerClockS™ family of High Performance
Clock Solutions from IDT. The ICS8735-31 has a
fully integrated PLL and can be configured as zero
0
1
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
÷2, ÷4, ÷8, ÷16,
÷32
,
PLL
÷64, ÷128
0
1
1
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Features
Five differential 3.3V LVPECL output pairs
Selectable differential clock inputs
CLKx/nCLKx pairs can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
Output frequency range: 15.625MHz to 350MHz
Input frequency range: 15.625MHz to 350MHz
VCO range: 250MHz to 700MHz
External feedback for “zero delay” clock regeneration
with configurable frequencies
Programmable dividers allow for the following output-to-input
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
Cycle-to-cycle jitter: 60ps (maximum)
Output skew: 35ps (maximum)
Static phase offset: 55ps ± 125ps
Full 3.3V supply voltage
0°C to 70°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Pin Assignment
CLK_SEL
nCLK1
nCLK0
CLK1
SEL0
SEL1
CLK0
7mm x 7mm x 1.4mm package body
MR
1
2
3
5
6
7
8
4
ICS8735AY-31 REV. B FEBRUARY 18, 2009
32 31 30 29 28 27 26 25
9
10 11 12 13 14 15 16
32-Lead LQFP
ICS8735-31
Y Package
Top View
ICS8735-31
20
19
18
17
24
23
22
21
Q3
nQ3
nQ2
Q1
nQ1
V
V
Q2
CCO
CCO

Related parts for ICS8735AY-31LF

ICS8735AY-31LF Summary of contents

Page 1

... Q2 nQ2 1 Q3 nQ3 Q4 PLL nQ4 1 ICS8735-31 Pin Assignment SEL0 1 2 SEL1 3 CLK0 nCLK0 4 5 CLK1 6 nCLK1 CLK_SEL ICS8735-31 32-Lead LQFP 7mm x 7mm x 1.4mm package body Y Package Top View ICS8735AY-31 REV. B FEBRUARY 18, 2009 24 V CCO Q3 23 nQ3 nQ2 Q1 19 nQ1 CCO ...

Page 2

... Analog supply pin. PLL select. Selects between the PLL and reference clock as the input to the Pullup dividers. When LOW, selects reference clock. When HIGH, selects PLL. LVCMOS/LVTTL interface levels. Test Conditions 2 Minimum Typical Maximum ICS8735AY-31 REV. B FEBRUARY 18, 2009 Units pF Ω k Ω k ...

Page 3

... Outputs PLL_SEL = 1 PLL Enable Mode Q0:Q4, nQ0:nQ4 ÷1 ÷1 ÷1 ÷1 ÷2 ÷2 ÷2 ÷4 ÷4 ÷ ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 4

... SEL3 SEL2 SEL1 IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR Outputs PLL_SEL = 0 PLL Bypass Mode SEL0 Q0:Q4, nQ0:nQ4 0 ÷8 1 ÷8 0 ÷8 1 ÷16 0 ÷16 1 ÷16 0 ÷32 1 ÷32 0 ÷64 1 ÷128 0 ÷4 1 ÷4 0 ÷8 1 ÷2 0 ÷4 1 ÷2 4 ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 5

... V = 3.465V 3.465V 3.465V 0. 0V 0°C to 70° Typical Maximum 3.3 3.465 3.3 3.465 3.3 3.465 150 0°C to 70° Minimum Typical Maximum 0.3 CC -0.3 0.8 150 5 -5 -150 ICS8735AY-31 REV. B FEBRUARY 18, 2009 Units Units V V µA µA µA µA ...

Page 6

... EE A Minimum Typical Maximum V – 1.4 V – 0.9 CCO CCO V – 2.0 V – 1.7 CCO CCO 0.6 1 0°C to 70° Minimum Typical Maximum 15.625 350 700 ICS8735AY-31 REV. B FEBRUARY 18, 2009 Units µA µA µA µ Units Units MHz MHz ...

Page 7

... IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR = 3.3V ± 5 0V, T CCA CCO EE Test Conditions PLL_SEL = 0, f ≤ 350MHz PLL_SEL = 1 20 0°C to 70°C A Minimum Typical Maximum 350 3.8 5.1 35 -70 55 +180 60 1 200 750 47 53 ICS8735AY-31 REV. B FEBRUARY 18, 2009 Units MHz ...

Page 8

... IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR SCOPE Qx nQx Differential Input Level V nQx nQy Output Skew nQ[0:4] ➤ ➤ tcycle n+1 Q[0:4] | Output Rise/Fall Time nCLK0, nCLK1 V Cross Points PP CLK0, CLK1 V EE tsk(o) 80% 80% 20 ICS8735AY-31 REV. B FEBRUARY 18, 2009 V CMR 20 ...

Page 9

... IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR nCLK0, nCLK1 CLK0, CLK1 nQ[0:4] x 100% Q[0:4] Propagation Delay Outputs: LVPECL Outputs All unused LVPECL outputs can be left floating. We recommend that there is no trace attached. Both sides of the differential output pair should either be left floating or terminated ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 10

... IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR and V should be CCA CCO CCA / Figure 2. Single-Ended Signal Driving Differential Input 10 3. .01µF 10Ω V CCA .01µF 10µF Figure 1. Power Supply Filtering Single Ended Clock Input CLKx V_REF nCLKx C1 0. ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 11

... Zo = 50Ω R1 100 Zo = 50Ω LVDS Driven by a 3.3V LVDS Driver 2. 120 120 Zo = 60Ω 60Ω SSTL R1 R2 120 120 Driven by a 2.5V SSTL Driver ICS8735AY-31 REV. B FEBRUARY 18, 2009 3.3V CLK nCLK HiPerClockS Input 3.3V CLK nCLK Receiver 3.3V CLK nCLK HiPerClockS ...

Page 12

... FIN FOUT 50Ω RTT Figure 4B. 3.3V LVPECL Output Termination 12 3.3V 125Ω 125Ω 50Ω o FIN Z = 50Ω o 84Ω 84Ω ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 13

... VCC 10 C16 10u (77.76 MHz Ohm Ohm Bypass capacitor located near the power pins (U1-9) (U1-32) VCC C1 C6 0.1uF 0.1uF (U1-16) (U1-17) (U1-24) VCCO C2 C4 0.1uF 0.1uF ICS8735AY-31 REV. B FEBRUARY 18, 2009 + - LVPECL_input R4 50 Output Termination Example VCC=3.3V VCCO=3.3V (U1-25 0.1uF 0.1uF ...

Page 14

... Make sure no other signal traces are routed between the clock trace pair. • The matching termination resistors should be located as close to the receiver input pins as possible GND VCCO VCC VCCA VIA 50 Ohm Traces ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 15

... 3.465V * 150mA = 519.75mW CC_MAX * Pd_total + for 32 Lead LQFP, Forced Convection θ vs. Air Flow JA 0 67.8°C/W 47.9°C/W 15 must be used. Assuming no air flow JA 200 500 55.9°C/W 50.1°C/W 42.1°C/W 39.4°C/W ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 16

... IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR V OUT RL 50Ω CCO = V – 0.9V CCO_MAX = V – 1.7V CCO_MAX ] * (V – [(2V – CCO_MAX OH_MAX ] * (V – [(2V – CCO_MAX OL_MAX 16 – V ))/ CCO_MAX OH_MAX L CCO_MAX – V ))/ CCO_MAX OL_MAX L CCO_MAX ICS8735AY-31 REV. B FEBRUARY 18, 2009 – OH_MAX – OL_MAX ...

Page 17

... NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs. Transistor Count The transistor count for ICS8735-31 is: 2969 IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR θ vs. Air Flow JA 0 200 67.8°C/W 55.9°C/W 47.9°C/W 42.1°C/W 17 ICS8735AY-31 REV. B FEBRUARY 18, 2009 500 50.1°C/W 39.4°C/W ...

Page 18

... D1 & E1 7.00 Basic D2 & E2 5.60 Ref. e 0.80 Basic L 0.45 0.60 θ 0° ccc Reference Document: JEDEC Publication 95, MS-026 IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR Maximum 1.60 0.15 1.45 0.45 0.20 0.75 7° 0.10 18 ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 19

... Shipping Packaging 32 Lead LQFP 32 Lead LQFP 1000 Tape & Reel “Lead-Free” 32 Lead LQFP “Lead-Free” 32 Lead LQFP 1000 Tape & Reel 19 Temperature Tray 0°C to 70°C 0°C to 70°C Tray 0°C to 70°C 0°C to 70°C ICS8735AY-31 REV. B FEBRUARY 18, 2009 ...

Page 20

... Ordering Information Table - deleted “ICS” from Part/Order Number. 1 Pin Assignment -due to format conversion dated February 11, 2008 datasheet, B corrected typo on pin 19 from nQ1 to Q1 and, pin 10 from FB_IN to nFB_IN. IDT™ / ICS™ 3.3V LVPECL ZERO DELAY CLOCK GENERATOR 20 ICS8735AY-31 REV. B FEBRUARY 18, 2009 Date 12/19/07 2/11/08 2/18/09 ...

Page 21

ICS8735-31 1:5, DIFFERENTIAL-TO-3.3V LVPECL ZERO DELAY CLOCK GENERATOR Sales 800-345-7015 (inside USA) +408-284-8200 (outside USA) Fax: 408-284-2775 www.IDT.com/go/contactIDT © 2009 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are ...

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