IDT 23S05

IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT23S05
3.3V ZERO DELAY CLOCK
BUFFER, SPREAD SPECTRUM
COMPATIBLE
FEATURES:
DESCRIPTION:
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The IDT23S05 is a high-speed phase-lock loop (PLL) clock buffer,
designed to address high-speed clock distribution applications. The zero
delay is achieved by aligning the phase between the incoming clock and
the output clock, operable within the range of 10 to 133MHz.
The IDT23S05 is an 8-pin version of the IDT23S09. IDT23S05 accepts
one reference input, and drives out five low skew clocks. The -1H version
of this device operates up to 133MHz frequency and has a higher drive than
the -1 device. All parts have on-chip PLLs which lock to an input clock on
the REF pin. The PLL feedback is on-chip and is obtained from the CLKOUT
pad. In the absence of an input clock, the IDT23S05 enters power down.
In this mode, the device will draw less than 12µA for Commercial Temperature range and less than 25µA for Industrial temperature range, the outputs
are tri-stated, and the PLL is not running, resulting in a significant reduction
of power.
The IDT23S05 is characterized for both Industrial and Commercial
operation.
Phase-Lock Loop Clock Distribution
10MHz to 133MHz operating frequency
Distributes one clock input to one bank of five outputs
Zero Input-Output Delay
Output Skew < 250ps
Low jitter <200 ps cycle-to-cycle
IDT23S05-1 for Standard Drive
IDT23S05-1H for High Drive
No external RC network required
Operates at 3.3V VDD
Power down mode
Spread spectrum compatible
Available in SOIC package
FUNCTIONAL BLOCK DIAGRAM
8
CLKOUT
REF
1
3
PLL
CLK1
Control
Logic
2
5
7
CLK2
CLK3
CLK4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
AUGUST 2010
1
c
2010
Integrated Device Technology, Inc.
DSC 6381/7
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
REF
1
8
CLKOUT
CLK2
2
7
CLK4
CLK1
3
6
VDD
GND
4
5
CLK3
Rating
Max.
Unit
VDD
Supply Voltage Range
–0.5 to +4.6
V
VI (2)
Input Voltage Range (REF)
–0.5 to +5.5
V
VI
Input Voltage Range
–0.5 to
V
(except REF)
VDD+0.5
IIK (VI < 0)
Input Clamp Current
–50
mA
IO (VO = 0 to VDD)
Continuous Output Current
±50
mA
VDD or GND
Continuous Current
±100
mA
TA = 55°C
Maximum Power Dissipation
0.7
W
TSTG
Storage Temperature Range
–65 to +150
°C
Operating
Commercial Temperature
0 to +70
°C
Temperature
Range
-40 to +85
°C
(in still air)(3)
SOIC
TOP VIEW
Operating
Industrial Temperature
Temperature
Range
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. The input and output negative-voltage ratings may be exceeded if the input and output
clamp-current ratings are observed.
3. The maximum package power dissipation is calculated using a junction temperature
of 150°C and a board trace length of 750 mils.
APPLICATIONS:
•
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SDRAM
Telecom
Datacom
PC Motherboards/Workstations
Critical Path Delay Designs
PIN DESCRIPTION
Pin Name
REF
(1)
CLK2(2)
CLK1
(2)
GND
CLK3
(2)
VDD
CLK4
(2)
CLKOUT
(2)
Pin Number
Type
Functional Description
1
IN
Input reference clock, 5 Volt tolerant input
2
Out
Output clock
3
Out
Output clock
4
Ground
Ground
5
Out
Output clock
6
PWR
3.3V Supply
7
Out
Output clock
8
Out
Output clock, internal feedback on this pin
NOTES:
1. Weak pull down.
2. Weak pull down on all outputs.
2
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
OPERATING CONDITIONS - COMMERCIAL
Symbol
Parameter
Min.
Max.
Unit
3
3.6
V
Operating Temperature (Ambient Temperature)
0
70
°C
Load Capacitance < 100MHz
—
30
pF
Load Capacitance 100MHz - 133MHz
—
10
Input Capacitance
—
7
VDD
Supply Voltage
TA
CL
CIN
pF
DC ELECTRICAL CHARACTERISTICS - COMMERCIAL
Symbol
Parameter
Conditions
Min.
Max.
Unit
VIL
Input LOW Voltage Level
—
0.8
V
VIH
Input HIGH Voltage Level
2
—
V
IIL
Input LOW Current
VIN = 0V
—
50
µA
IIH
Input HIGH Current
VIN = VDD
—
100
µA
VOL
Output LOW Voltage
Standard Drive
IOL = 8mA
—
0.4
V
High Drive
IOL = 12mA (-1H)
VOH
Output HIGH Voltage
Standard Drive
IOH = -8mA
2.4
—
V
High Drive
IOH = -12mA (-1H)
IDD_PD
Power Down Current
REF = 0MHz
—
12
µA
Supply Current
Unloaded Outputs at 66.66MHz
—
32
mA
IDD
(1,2)
SWITCHING CHARACTERISTICS (23S05-1) - COMMERCIAL
Symbol
t1
Parameter
Conditions
Min.
Typ.
Max.
Unit
10
—
133
MHz
Output Frequency
10pF Load
30pF Load
10
—
100
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT = 66.66MHz
40
50
60
%
t3
Rise Time
Measured between 0.8V and 2V
—
—
2.5
ns
t4
Fall Time
Measured between 0.8V and 2V
—
—
2.5
ns
t5
Output to Output Skew
All outputs equally loaded
—
—
250
ps
t6
Delay, REF Rising Edge to CLKOUT Rising Edge
Measured at VDD/2
—
0
±350
ps
t7
Device-to-Device Skew
Measured at VDD/2 on the CLKOUT pins of devices
—
0
700
ps
tJ
Cycle-to-Cycle Jitter, pk - pk
Measured at 66.66MHz, loaded outputs
—
—
200
ps
PLL Lock Time
Stable power supply, valid clock presented on REF pin
—
—
1
ms
tLOCK
NOTES:
1. REF Input has a threshold voltage of VDD/2.
2. All parameters specified with loaded outputs.
3
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
(1,2)
SWITCHING CHARACTERISTICS (23S05-1H) - COMMERCIAL
Symbol
Min.
Typ.
Max.
Unit
Output Frequency
10pF Load
30pF Load
10
10
—
—
133
100
MHz
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT = 66.66MHz
40
50
60
%
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT <50MHz
45
50
55
%
t3
Rise Time
Measured between 0.8V and 2V
—
—
1.5
ns
t4
Fall Time
Measured between 0.8V and 2V
—
—
1.5
ns
t5
Output to Output Skew
All outputs equally loaded
—
—
250
ps
t6
Delay, REF Rising Edge to CLKOUT Rising Edge
Measured at VDD/2
—
0
±350
ps
t7
Device-to-Device Skew
Measured at VDD/2 on the CLKOUT pins of devices
—
0
700
ps
t8
Output Slew Rate
Measured between 0.8V and 2V using Test Circuit #2
1
—
—
V/ns
tJ
Cycle-to-Cycle Jitter, pk - pk
Measured at 66.66MHz, loaded outputs
—
—
200
ps
PLL Lock Time
Stable power supply, valid clock presented on REF pin
—
—
1
ms
t1
tLOCK
Parameter
Conditions
NOTES:
1. REF Input has a threshold voltage of VDD/2.
2. All parameters specified with loaded outputs.
OPERATING CONDITIONS - INDUSTRIAL
Symbol
Parameter
Min.
Max.
Unit
VDD
Supply Voltage
3
3.6
V
TA
Operating Temperature (Ambient Temperature)
-40
+85
°C
CL
Load Capacitance < 100MHz
—
30
pF
Load Capacitance 100MHz - 133MHz
—
10
CIN
Input Capacitance
—
7
pF
DC ELECTRICAL CHARACTERISTICS - INDUSTRIAL
Symbol
Parameter
Conditions
VIL
Input LOW Voltage Level
VIH
Input HIGH Voltage Level
IIL
Input LOW Current
VIN = 0V
IIH
Input HIGH Current
VIN = VDD
VOL
Output LOW Voltage
Standard Drive
IOL = 8mA
High Drive
IOL = 12mA (-1H)
Standard Drive
IOH = -8mA
High Drive
IOH = -12mA (-1H)
VOH
IDD_PD
IDD
Output HIGH Voltage
Min.
Max.
Unit
—
0.8
V
2
—
V
—
50
µA
—
100
µA
—
0.4
V
2.4
—
V
Power Down Current
REF = 0MHz
—
25
µA
Supply Current
Unloaded Outputs at 66.66MHz
—
35
mA
4
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS (23S05-1) - INDUSTRIAL
Symbol
t1
Parameter
Output Frequency
(1,2)
Conditions
Min.
Typ.
Max.
Unit
10pF Load
10
—
133
MHz
30pF Load
10
—
100
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT = 66.66MHz
40
50
60
%
t3
Rise Time
Measured between 0.8V and 2V
—
—
2.5
ns
t4
Fall Time
Measured between 0.8V and 2V
—
—
2.5
ns
t5
Output to Output Skew
All outputs equally loaded
—
—
250
ps
t6
Delay, REF Rising Edge to CLKOUT Rising Edge
Measured at VDD/2
—
0
±350
ps
t7
Device-to-Device Skew
Measured at VDD/2 on the CLKOUT pins of devices
—
0
700
ps
tJ
tLOCK
Cycle-to-Cycle Jitter, pk - pk
Measured at 66.66MHz, loaded outputs
—
—
200
ps
PLL Lock Time
Stable power supply, valid clock presented on REF pin
—
—
1
ms
NOTES:
1. REF Input has a threshold voltage of VDD/2.
2. All parameters specified with loaded outputs.
SWITCHING CHARACTERISTICS (23S05-1H) - INDUSTRIAL
Symbol
t1
Parameter
Conditions
(1,2)
Min.
Typ.
Max.
Unit
Output Frequency
10pF Load
30pF Load
10
10
—
—
133
100
MHz
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT = 66.66MHz
40
50
60
%
Duty Cycle = t2 ÷ t1
Measured at 1.4V, FOUT <50MHz
45
50
55
%
t3
Rise Time
Measured between 0.8V and 2V
—
—
1.5
ns
t4
Fall Time
Measured between 0.8V and 2V
—
—
1.5
ns
t5
Output to Output Skew
All outputs equally loaded
—
—
250
ps
t6
Delay, REF Rising Edge to CLKOUT Rising Edge
Measured at VDD/2
—
0
±350
ps
t7
Device-to-Device Skew
Measured at VDD/2 on the CLKOUT pins of devices
—
0
700
ps
t8
Output Slew Rate
Measured between 0.8V and 2V using Test Circuit #2
1
—
—
V/ns
tJ
Cycle-to-Cycle Jitter, pk - pk
Measured at 66.66MHz, loaded outputs
—
—
200
ps
PLL Lock Time
Stable power supply, valid clock presented on REF pin
—
—
1
ms
tLOCK
NOTES:
1. REF Input has a threshold voltage of VDD/2.
2. All parameters specified with loaded outputs.
5
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
ZERO DELAY AND SKEW CONTROL
All outputs should be uniformly loaded in order to achieve Zero I/O Delay. Since the CLKOUT pin is the internal feedback for the PLL, its relative
loading can affect and adjust the input/output delay.
For designs utilizing zero I/O Delay, all outputs including CLKOUT must be equally loaded. Even if the output is not used, it must have a capacitive
load equal to that on the other outputs in order to obtain true zero I/O Delay. If I/O Delay adjustments are needed, use the Output Load Difference diagram
to calculate loading differences between the CLKOUT pin and other outputs. For zero output-to-output skew, all outputs must be loaded equally.
SPREAD SPECTRUM COMPATIBLE
Many systems being designed now use a technology called Spread Spectrum Frequency Timing Generation. This product is designed not to filter
off the Spread Spectrum feature of the reference input, assuming it exists. When a zero delay buffer is not designed to pass the Spread Spectrum feature
through, the result is a significant amount of tracking skew, which may cause problems in systems requiring synchronization.
6
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
SWITCHING WAVEFORMS
t1
Output
1.4V
t2
1.4V
1.4V
1.4V
1.4V
Output
t5
Output to Output Skew
Duty Cycle Timing
Output
0.8V
2V
2V
3.3V
0.8V
VDD/2
REF
0V
t4
t3
VDD/2
Output
t6
Input to Output Propagation Delay
All Outputs Rise/Fall Time
CLKOUT
Device 1
CLKOUT
Device 2
VDD/2
VDD/2
t7
Device to Device Skew
TEST CIRCUITS
VDD
0.1µF
CLKOUT
OUTPUTS
VDD
0.1µF
1KΩ
CLKOUT
OUTPUTS
CLOAD
1KΩ
10pF
VDD
VDD
0.1µF
0.1µF
GND
GND
GND
GND
Test Circuit 2 (t8, Output Slew Rate On -1H Devices)
Test Circuit 1 (all Parameters Except t8)
7
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
150 mil (N arrow Body) SOIC
SYMBOL
A
A1
B
C
D
E
e
H
h
L
N
a
In Millimeters
COMMON DIMENSIONS
MIN
MAX
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
SEE VARIATIONS
3.80
4.00
1.27 BASIC
5.80
6.20
0.25
0.50
0.40
1.27
SEE VARIATIONS
0°
8°
In Inches
COMMON DIMENSIONS
MIN
MAX
.0532
.0688
.0040
.0098
.013
.020
.0075
.0098
SEE VARIATIONS
.1497
.1574
0.050 BASIC
.2284
.2440
.010
.020
.016
.050
SEE VARIATIONS
0°
8°
VARIATIONS
N
8
D mm.
MIN
4.80
D (inch)
MAX
5.00
Reference Doc.: JEDEC Publication 95, MS-012
8
MIN
.1890
MAX
.1968
IDT23S05
3.3V ZERO DELAY CLOCK BUFFER, SPREAD SPECTRUM
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT
XXXXX
Device Type
XX
Package
X
Process
Blank
I
Commercial (0oC to +70oC)
Industrial (-40oC to +85oC)
DC
DCG
Small Outline
SOIC - Green
23S05-1
23S05-1H
Zero Delay Clock Buffer with
High Drive, Spread Spectrum Compatible
Part / Order Number
Shipping Packaging
Package
Temperature
23S05-1DCG
23S05-1DCG8
23S05-1DCGI
23S05-1DCGI8
23S05-1HDCG
23S05-1HDCG8
23S05-1HDCGI
23S05-1HDCGI8
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
0° to +70° C
0° to +70° C
-40° to +85°C
-40° to +85°C
0° to +70° C
0° to +70° C
-40° to +85°C
-40° to +85°C
CORPORATE HEADQUARTERS
6024 Silver Creek Valley Road
San Jose, CA 95138
for SALES:
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
9
for Tech Support:
[email protected]