IDT IDT5V927 Quad output clock generator Datasheet

IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
IDT5V927
QUAD OUTPUT
CLOCK GENERATOR
DESCRIPTION:
FEATURES:
•
•
•
•
•
•
•
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The IDT5V927 is a low-cost, low skew, low jitter, and high-performance
clock synthesizer. It has been specially designed to interface with Gigabit
Ethernet (125MHz), Fibre Channel (106.25MHz), and OC-3 (155.52MHz)
applications. It can be programmed to provide output frequencies ranging
from 50MHz to 160MHz, with input frequencies ranging from 6.25MHz to
80MHz.
The IDT5V927 includes an internal RC filter that provides excellent jitter
characteristics and eliminates the need for external components. When
using the optional crystal input, the chip accepts a 10 - 40MHz fundamental
mode crystal with a maximum equivalent series resistance of 50Ω.
3V to 3.6V operating voltage
50MHz to 160MHz output frequency range
Input from fundamental crystal oscillator or external source
Internal PLL feedback (loading feedback output relative to
other outputs, adjusts propagation delay between REF inputs
and outputs)
Select inputs (S[1:0]) for FB divide selection (multiply ratio of 2,
3, 4, 4.25, 5, 6, 6.25, and 8)
Low jitter
PLL bypass for testing and power-down control (S1 = H, S0 = H,
µ A)
powers part down <500µ
Available in TSSOP package
APPLICATIONS:
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•
•
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Gigabit ethernet
Router
Network switches
SAN
Instrumentation
Fibre channel
FUNCTIONAL BLOCK DIAGRAM
OE
VCO DIVIDE
1/N
PHASE
DETECTOR
REF
CHARGE
PUM P
LOO P
FILTER
VCO
Q0
Q1
0
Q2
1
Q3
X2
CRYSTAL
O SCILLATO R
SELECT M O DE
X1
S1
S0
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2003
1
c
2003 Integrated Device Technology, Inc.
DSC
5853/6
IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
REF
ABSOLUTE MAXIMUM RATINGS(1)
16
1
Symbol
Description
Max.
Unit
VDD/VDDQ
Supply Voltage to Ground
– 0.5 to +4.6
V
S0
VI
Input Voltage
– 0.5 to +4.6
V
IO
Output Current
±50
mA
X1
2
15
S1
X2
3
14
OE
VDD
4
13
GND
Q0
5
12
Q3
GND
6
11
GND
Q1
7
10
Q2
VDDQ
8
9
TSTG
Storage Temperature
– 65 to +150
°C
TJ
Junction Temperature
150
°C
NOTE:
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.
PIN DESCRIPTION
VDDQ
Pin Name Type
TSSOP
TOP VIEW
CRYSTAL SPECIFICATION
The crystal oscillators should be fundamental mode quartz crystals:
overtone crystals are not suitable. Crystal frequency should be specified
for parallel resonance with 50Ω maximum equivalent series resonance.
Crystal tuning capacitors should be connected from X2/REF to GND and from
X1 to GND.
Description
S[1:0]
I
Three level divider/mode select pins. Float to MID.
OE
I
Output enable bar. OE has a pull-down. Output Q[1:3] tristated
when HIGH. Output Q0 remains running when in PLL mode
and tri-states when in TEST mode.
X1
I
Crystal oscillator input. Connect to GND if oscillator not required.
X2
I
Crystal oscillator output. Leave unconnected for clock input.
REF
I
Input clock. Connect to X2 if crystal oscillator is used.
Q[1:3]
O
Output at N*REF frequency
Q0
O
Output at N*REF internally connected for PLL feedback
VDDQ
PWR
Power supply for the device outputs. Connect to VDD on PCB.
VDD
PWR
Power supply for the device core and inputs. Connect to VDD
on PCB.
GND
PWR
Ground supply
DIVIDE SELECTION TABLE(1)
S1
S0
Divide-by-N Value
Mode
L
L
2
PLL
L
M
3
PLL
L
H
4
PLL
M
L
4.25
PLL
M
M
5
PLL
M
H
6
PLL
H
L
6.25
PLL
H
M
8
PLL
H
H
TEST
TEST (2)
NOTES:
1. H = HIGH
M = MEDIUM
L = LOW
2. Test mode for low frequency testing. In this mode, REF clock bypasses the VCO (VCO powered down) and the crystal oscillator is powered down.
2
IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
COMMON OUTPUT FREQUENCY EXAMPLES (MHz)
Output
50
Input
25
10
16
12
25
10
15
20
FB Divide Selection S[1:0]
LL
MH
LH
MH
LM
HM
MH
MM
106.25
106.25
120
125
125
125
150
155.52
Input
17
25
15
20
25
62.5
25
19.44
FB Divide Selection S[1:0]
HL
ML
HM
HL
MM
LL
MH
HM
Output
60
64
72
75
80
90
100
OPERATING CONDITIONS
Symbol
Parameter
Min.
Typ.
Max.
Unit
VDD/VDDQ
Power Supply Voltage
3
3.3
3.6
V
TA
Operating Temperature
- 40
25
+85
°C
CL
Output Load Capacitance
—
—
15
pF
CIN
Input Capacitance, OE, F = 1MHz, VIN = 0V, TA = 25°C
—
5
7
pF
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VDD/VDDQ = 3.3V ±0.3V
Symbol
VIL
VIH
VIHH
VIMM
VILL
IIN
Parameter
Input LOW Voltage
Input HIGH Voltage
Input HIGH Voltage
Input MID Voltage
Input LOW Voltage
Input Leakage Current (REF input only)
I3
3-Level Input DC Current, S[1:0]
IIH
Input HIGH Current
VOL
VOH
Output LOW Voltage
Output HIGH Voltage
Test Conditions
3-level input only
3-level input only
3-level input only
VIN = VDD or GND,VDD = Max.
VIN = VDD
HIGH Level
VIN = VDD/2
MID Level
VIN = GND
LOW Level
VIN = VDD
OE
VIN = VDD, S[1:0] = HH X1
IOL = 12mA
IOH = -12mA
3
Min.
—
2
VDD - 0.6
VDD/2 - 0.3
—
-5
—
- 50
- 200
—
—
—
2.4
Typ.
—
—
—
—
—
—
—
—
—
—
2
—
—
Max
0.8
—
—
VDD/2 + 0.3
0.6
+5
+200
+50
—
100
4
0.4
—
Unit
V
V
V
V
V
µA
µA
µA
mA
V
V
IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
IDD_PD
Parameter
Test Conditions (1)
Power Down Current
VDD = Max.
Min.
Typ.
Max
Unit
—
—
500
µA
S[1:0] = HH
OE = L; REF = L; X1 = L
All outputs unloaded
∆IDD
Supply Current per Input
VDD = Max., VIN = 3V
—
—
30
µA
IDD
Dynamic Supply Current
VDD = 3.6V
—
—
130
mA
S[1:0] = LL
OE = L
FOUT = 150MHz
All outputs unloaded
NOTE:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
AC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Symbol
Parameter
Test Conditions
tR, tF
Rise Time, Fall Time
0.8V to 2V
dT
Output/Duty Cycle
VT = VDDQ/2
tPD
REF to Q0(1)
VT = VDDQ/2
tSK
Output to Output Skew (Q0 to Q1:3)
Equal loads
tJ
Cycle - Cycle Jitter
fOUT ≥ 100MHz
fOUT
Min.
Typ.
Max.
Unit
—
0.7
1.5
ns
%
45
50
55
fOUT ≥ 100MHz, all N
-200
—
200
50 < fOUT < 160MHz, N ≤ 4
-200
—
200
50 < fOUT < 160MHz, N ≥ 4.25
-350
—
350
—
—
200
Output Frequency
ps
ps
-100
—
100
ps
50
—
160
MHz
NOTE:
1. When using a clock input.
INPUT TIMING REQUIREMENTS
Description(1)
Symbol
tR, tF
Maximum input rise and fall time, 0.8V to 2V(2)
tPWC
Input clock pulse, HIGH or LOW(2)
DH
Input duty cycle(2)
fOSC
XTAL oscillator frequency
fIN
Min.
Input frequency(2)
NOTES:
1. Where pulse width implied by DH is less than the tPWC limit, tPWC limit applies,
2. When using a clock input.
4
Max.
Unit
—
10
ns/V
2
—
ns
10
90
%
—
40
MHz
50/N
160/N
MHz
IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
AC TEST LOADS AND WAVEFORMS
V DD
150 Ω
OUTPUT
150 Ω
15pF
AC Test Load
3V
2V
V TH = V D D /2
0.8
0V
1ns
1ns
Input Test Waveform
VDDQ
2V
V TH = V D DQ /2
0.8
0V
tR
tF
Output Waveform
5
IDT5V927
QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XXXX
Device Type
X
Package
X
Package
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
I
Industrial Temperature Range (-40°C to +85°C)
PG
PGG
Thin Shrink Small Outline Package
TSSOP - Green
5V927
Quad Output Clock Generator
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
6
for Tech Support:
[email protected]
(408) 654-6459
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