IDT5V2305
2.5V TO 3.3V HIGH PERFORMANCE CLOCK BUFFER
INDUSTRIAL TEMPERATURE RANGE
2.5V TO 3.3V HIGH
PERFORMANCE CLOCK
BUFFER
FEATURES:
DESCRIPTION:
IDT5V2305
• High performance 1:5 clock driver for general purpose applica-
tions
• Operates up to 170MHz at V
DD
= 2.5V
• Operates up to 200MHz at V
DD
= 3.3V
• Pin-to-pin skew < 50ps
• V
DD
range: 2.3V to 3.6V
• Output enable glitch suppression
• 25Ω on-chip series dampening resistors
Ω
• Available in TSSOP and VFQFPN packages
The IDT5V2305 is a high performance, low skew clock buffer that
operates up to 200MHz. One bank of five outputs provides low skew copies
of CLK. Through the use of control pin G, the outputs of bank Y(0:4) can
be placed in a low state regardless of CLK input. The device operates in
2.5V and 3.3V environments. The built-in output enable glitch suppression
ensures a synchronized output enable sequence to distribute full period
clock signals.
The IDT5V2305 is characterized for operation from -40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
3
G
9
CONTROL LOGIC
Y
0
25Ω
5
25Ω
16
Y
1
CLK
6
25Ω
Y
2
11
25Ω
Y
3
13
25Ω
Y
4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2003
Integrated Device Technology, Inc.
SEPTEMBER 2003
DSC 6177/11
IDT5V2305
2.5V TO 3.3V HIGH PERFORMANCE CLOCK BUFFER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
CLK
GND
V
DD
Y
0
GND
Y
1
Y
2
V
DD
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CLK
V
DD
1
V
DD
V
DD
Y
4
GND
Y
3
V
DD
G
16
15
14
GND
13
12
11
10
V
DD
NC
Y
4
NC
Y
3
NC
V
DD
Y
0
NC
Y
1
Y
2
V
DD
2
3
4
5
6
7
8
9
G
V
DD
TSSOP
TOP VIEW
VFQFPN
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
DD
V
I
V
O
I
IK
I
OK
I
O
T
STG
Description
Power Supply Voltage
Input Voltage
(2)
Output Voltage
(2)
Input Clamp Current
V
I
< 0 or V
I
> V
DD
Output Clamp Current
V
O
< 0 or V
O
> V
DD
Continuous Total Output Current
V
O
< 0 to V
DD
Storage Temperature
Max
–0.5 to +4.6
–0.5 to V
DD
+0.5
–0.5 to V
DD
+0.5
Unit
V
V
V
mA
mA
mA
CAPACITANCE
(T
A
= +25°C, f = 1MHz, V
IN
= 0V)
Parameter
C
IN
Description
Input Capacitance
V
I
= 0V or V
DD
Min.
—
Typ.
2.5
Max.
—
Unit
pF
±
50
±
50
±
50
–65 to +150
FUNCTION TABLE
(1)
Inputs
G
CLK
X
H
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Output
Y
(0:4)
L
H
°C
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. Not to exceed 4.6V.
2
IDT5V2305
2.5V TO 3.3V HIGH PERFORMANCE CLOCK BUFFER
INDUSTRIAL TEMPERATURE RANGE
PIN DESCRIPTION
TERMINAL
Symbol
I/O
G
I
Y
(0:4)
CLK
GND
V
DD
O
I
PWR
Description
Output Enable Control for Y
(0:4)
Outputs. This output enable is active HIGH. If this pin is Logic HIGH, the Y
(0:4)
clock outputs will follow the
input clock (CLK). If this pin is logic LOW, the Y
(0:4)
outputs will drive low independent of the state of CLK.
Buffered Output Clocks
Input Reference Frequency
Ground
DC Power Supply, 2.3V to 3.6V
RECOMMENDED OPERATING RANGE
Symbol
V
DD
V
IL
V
IH
V
I
I
OH
I
OL
T
A
Description
Internal Power Supply Voltage
Input Voltage LOW
Input Voltage HIGH
Input Voltage
Output Current HIGH
Output Current LOW
Ambient Operating Temperature
V
DD
= 3V to 3.6V
V
DD
= 2.3V to 2.7V
V
DD
= 3V to 3.6V
V
DD
= 2.3V to 2.7V
V
DD
= 3V to 3.6V
V
DD
= 2.3V to 2.7V
V
DD
= 3V to 3.6V
V
DD
= 2.3V to 2.7V
-40
Min.
2.3
Typ.
2.5
3.3
Max.
3.6
0.8
0.7
Unit
V
V
V
V
DD
-12
-6
12
6
+85
V
mA
mA
°C
2
1.7
0
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Symbol
V
IK
I
IN
I
DD
Parameter
Input Voltage
Input Current
Static Device Current
(1)
Test Conditions
V
DD
= 3V, I
IN
= -18mA
V
I
= 0V or V
DD
CLK = 0V or V
DD
, I
O
= 0mA, V
DD
= 3.3V
Min.
Typ.
Max
- 1.2
±5
25
Unit
V
µA
µA
NOTE:
1. For I
DD
over frequency, see TEST CIRCUIT AND WAVEFORMS.
DC ELECTRICAL CHARACTERISTICS - V
DD
= 3.3V ± 0.3V
Symbol
V
OH
Parameter
HIGH level Output Voltage
Test Conditions
I
OH
= -100µA
V
DD
= Min. to Max.
V
DD
= 3V
I
OH
= -12mA
I
OH
= -6mA
I
OH
= 100µA
V
DD
= Min. to Max.
V
DD
= 3V
I
OH
= 12mA
I
OH
= 6mA
V
O
= 1V
V
DD
= 3V
V
DD
= 3.3V
V
O
= 1.65V
V
DD
= 3.6V
V
O
= 3.135V
V
O
= 1.95V
V
DD
= 3V
V
DD
= 3.3V
V
O
= 1.65V
V
O
= 0.4V
V
DD
= 3.6V
Min.
V
DD
- 0.2
2.1
2.4
Typ.
(1)
Max
Unit
V
0.2
0.8
0.55
-28
-36
-14
28
36
14
mA
mA
V
OL
LOW level Output Voltage
V
I
OH
HIGH level Output Current
I
OL
LOW level Output Current
NOTE:
1. All typical values are at respective nominal V
DD
.
3
IDT5V2305
2.5V TO 3.3V HIGH PERFORMANCE CLOCK BUFFER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS - V
DD
= 2.5V ± 0.2V
Symbol
V
OH
V
OL
Parameter
HIGH level Output Voltage
LOW level Output Voltage
Test Conditions
V
DD
= Min. to Max.
I
OH
= -100µA
V
DD
= 2.3V
I
OH
= -6mA
V
DD
= Min. to Max.
I
OH
= 100µA
V
DD
= 2.3V
I
OH
= 6mA
V
O
= 1V
V
DD
= 2.3V
V
DD
= 2.5V
V
O
= 1.25V
V
DD
= 2.7V
V
O
= 2.375V
V
O
= 1.2V
V
DD
= 2.3V
V
DD
= 2.5V
V
O
= 1.25V
V
O
= 0.3V
V
DD
= 2.7V
Min.
V
DD
- 0.2
1.8
Typ.
(1)
Max
Unit
V
V
0.2
0.55
-17
-25
-10
17
25
10
I
OH
HIGH level Output Current
mA
I
OL
LOW level Output Current
mA
NOTE:
1. All typical values are at respective nominal V
DD
.
TIMING REQUIREMENTS OVER RECOMMENDED RANGE
Symbol
f
CLK
Parameter
Clock Frequency
Test Conditions
V
DD
= 3V to 3.6V
V
DD
= 2.3V to 2.7V
Min.
0
0
Typ.
Max
200
170
Unit
MHz
4
IDT5V2305
2.5V TO 3.3V HIGH PERFORMANCE CLOCK BUFFER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE -
V
DD
= 3.3V ± 0.3V
(1)
Symbol
t
PLH
t
PHL
t
SK
(
O
)
(2)
t
SK
(
P
)
t
SK
(
PP
)
t
R
t
F
t
SU
t
H
Parameter
CLK to Yx
Output Skew, Yx to Yx
Pulse Skew
Part-to-Part Skew
Rise Time
Fall Time
G before CLK↓
G after CLK↓
Test Conditions
f = 0MHz to 200MHz, C
L
= 25pF
Min.
1.3
Typ.
(1)
Max
2.6
50
300
500
2
2
Unit
ns
ps
ps
ps
V/ns
V/ns
ns
V
O
= 0.4V to 2V
V
O
= 2V to 0.4V
V(
THRESHOLD
) = V
DD
/2
0.7
0.7
0.1
0.4
NOTES:
1. All typical values are at respective nominal V
DD
.
2. This specification is only valid for equal loading of all outputs.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE -
V
DD
= 2.5V ± 0.2V
(1)
Symbol
t
PLH
t
PHL
t
SK
(
O
)
(2)
t
SK
(
P
)
t
SK
(
PP
)
t
R
t
F
t
SU
t
H
Parameter
CLK to Yx
Output Skew, Yx to Yx
Pulse Skew
Part-to-Part Skew
Rise Time
Fall Time
G before CLK↓
G after CLK↓
Test Conditions
f = 0MHz to 170MHz, C
L
= 25pF
Min.
1.5
Typ.
(1)
Max
3.5
75
700
600
1.4
1.4
Unit
ns
ps
ps
ps
V/ns
V/ns
ns
V
O
= 0.4V to 1.7V
V
O
= 1.7V to 0.4V
V(
THRESHOLD
) = V
DD
/2
0.4
0.4
0.1
0.4
NOTES:
1. All typical values are at respective nominal V
DD
.
2. This specification is only valid for equal loading of all outputs.
5
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