OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

2305MI-1LF

P1-P3P4-P6P7-P9P10-P12
1
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT2305
3.3V ZERO DELAY CLOCK BUFFER
AUGUST 2012
2012 Integrated Device Technology, Inc. DSC 5174/8c
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEATURES:
• 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
• IDT2305-1 for Standard Drive
• IDT2305-1H for High Drive
• No external RC network required
• Operates at 3.3V VDD
• Power down mode
• Available in SOIC/TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
IDT2305
3.3V ZERO DELAY
CLOCK BUFFER
PLL
8
CLK1
CLK2
CLK3
CLK4
Control
Logic
REF
CLKOUT
1
3
2
5
7
DESCRIPTION:
The IDT2305 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 IDT2305 is an 8-pin version of the IDT2309. IDT2305 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 IDT2305 enters power down. In
this mode, the device will draw less than 25µA, the outputs are tri-stated,
and the PLL is not running, resulting in a significant reduction of power.
The IDT2305 is characterized for both Industrial and Commercial
operation.
2
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT2305
3.3V ZERO DELAY CLOCK BUFFER
REF
CLK1
2
3
4
8
7
6
5
1
CLK2
GND
CLKOUT
CLK4
V
DD
CLK3
PIN CONFIGURATION
SOIC/TSSOP
TOP VIEW
Symbol 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
V
I 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
T
A = 55°C Maximum Power Dissipation 0.7 W
(in still air)
(3)
TSTG Storage Temperature Range –65 to +150 ° C
Operating Commercial Temperature 0 to +70 °C
Temperature Range
Operating Industrial Temperature -40 to +85 °C
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.
NOTES:
1. Weak pull down on all outputs.
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
(1)
APPLICATIONS:
• SDRAM
• Telecom
• Datacom
• PC Motherboards/Workstations
• Critical Path Delay Designs
Pin Name Pin Number Type Functional Description
REF 1 IN Input reference clock, 5 Volt tolerant input
CLK2
(1)
2 Out Output clock
CLK1
(1)
3 Out Output clock
GND 4 Ground Ground
CLK3
(1)
5 Out Output clock
VDD 6 PWR 3.3V Supply
CLK4
(1)
7 Out Output clock
CLKOUT
(1)
8 Out Output clock, internal feedback on this pin
3
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT2305
3.3V ZERO DELAY CLOCK BUFFER
Symbol Parameter Min. Max. Unit
VDD Supply Voltage 3 3.6 V
TA Operating Temperature (Ambient Temperature) 0 70 °C
CL Load Capacitance < 100MHz — 30 pF
Load Capacitance 100MHz - 133MHz — 10
C
IN Input Capacitance — 7 pF
OPERATING CONDITIONS - COMMERCIAL
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
IDD Supply Current Unloaded Outputs at 66.66MHz — 32 mA
SWITCHING CHARACTERISTICS (2305-1) - COMMERCIAL
(1,2)
Symbol Parameter Conditions Min. Typ. Max. Unit
t
1 Output Frequency 10pF Load 10 — 133 MH z
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
t
LOCK 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.
P1-P3P4-P6P7-P9P10-P12

2305MI-1LF

Mfr. #:
Buy 2305MI-1LF
Manufacturer:
IDT
Description:
Clock Buffer 3.3V PLL ZERO DELAY CLOCK BUFFER
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet