PI6C49X0208
High Performance 1:8 Multi-Voltage CMOS Buffer
Features
•
•
•
•
•
•
•
•
•
8 single-ended outputs Fanout Buffer
Up to 200MHz output frequency
Ultra low output additive jitter = 0.01ps (typ.)
Selectable reference inputs support Xtal (10~50MHz), single-
ended and differential
Low output skew ~ 50ps (typ.)
2.5V / 3.3V operation
User configurable output VDDO in different banks:
– Mixed 3.3V core, 2.5V, 1.8V or 1.5V output operating
supply
– Mixed 2.5V core, 1.8V, 1.5V or 1.2V output operating
supply
Industrial temperature range: –40°C to +85°C
Packaging (Pb-free & Green available):
– 32-pin TQFN (ZH)
Applications
• Networking systems including switches and Routers
• High frequency backplane based computing and telecom
platforms
Description
The PI6C49X0208 is a high performance multi-voltage 8-outputs
CMOS Fanout Buffer with internal Crystal Oscillator. The XTAL
range is from 10MHz to 50MHz. The device has a wide range of
operating voltages of 2.5V and 3.3V. The device also provides user
selectable output VDD option, which provides excellent flexibilities
to users. This device is ideal for systems that need to distribute low
jitter clock signals to multiple destinations.
Pin Configuration
IN_SEL0
IN_SEL1
ENABLE
GNDO
GNDO
Block Diagram
GND
IN1#
IN1
IN_SEL0
IN_SEL1 ENABLE
V
DDO
32
31
30
29
28
27
26
25
CLK0
V
DDO
CLK1
GNDO
CLK2
V
DDO
CLK3
NC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
CLK7
V
DDO
CLK6
GNDO
CLK5
V
DDO
CLK4
NC
XIN
Sync
Crystal
Oscillator
Clock Input
Control Circuit
8
CLK0~7
XOUT
IN0
IN0#
IN1
IN1#
10
11
12
13
14
15
GNDO
GNDO
XIN
XOUT
IN0
IN0#
GND
V
DD
16
9
*IN0 can be single end ref clock0 and IN0# internal bias as Vdd/2
*IN1 can be single end ref clock1 and IN1# internal bias as Vdd/2
*IN-SEL[0:1] select XTAL, IN1/1# and IN0/0# input
12-0308
1
PI6C49X0208
Rev A
01/08/13
High Performance 1:8 Multi-Voltage CMOS Buffer
Pin Description
Pin#
1, 3, 5, 7, 18,
20, 22, 24
2, 6, 19, 23
4, 9, 16, 21, 25,
32
8, 17
15, 26
10
11
12
13
14
27
28
30, 29
31
Pin Name
CLK0~7
V
DDO
GNDO
Type
Description
Clock Outputs
Output Power Supplier
Core Ground
PI6C49X0208
Output
Power
Power
-
Power
Power
Input
Output
Input
Input
Input
Input
NC
GND
V
DD
XIN
XOUT
IN0
IN0#
IN1#
IN1
No Connect
Output Ground
Core Power Supplier
Crystal interface
Crystal interface
Pull-down
Pull-up/ Pull-
down
Pull-up/ Pull-
down
Pull-down
Pull-down
Diff or Single End
When IN0 is single end IN0# internal bias
as Vdd/2
When IN1 is single end IN1# internal bias
as Vdd/2
REF1 Diff or Single End
IN-SEL[0:1] select XTAL, IN1/1# and IN0/
IN0# input
Synchronous active high Output Enable,
LVCMOS/TTL
IN_SEL[0:1]
Input
ENABLE
Input
Input Mode Selection Logic
IN_SEL0
1
0
1
0
IN_SEL1
1
1
0
0
Selected Input
XTAL
XTAL
IN1/1# Diff or Single End
IN0/0# Diff or Single End
Input/Output Operation State
Input State
IN[0:1], IN[0:1]# open
IN[0:1], IN[0:1]# both to ground
IN[0:1]=High, IN[0:1]# =Low
IN[0:1]=Low, IN[0:1]# =High
Output State
Logic Low
Logic Low
Logic High
Logic Low
Output Mode Selection
ENABLE
GND
VDD
12-0308
Output CLK0~7
High-impedance
Enabled
2
PI6C49X0208
Rev A
01/08/13
High Performance 1:8 Multi-Voltage CMOS Buffer
Power Supply DC Characteristics
(
V
DD
/
V
DDO
= 3.3V ± 5%, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
3.135
3.135
Typ
3.3
3.3
Max.
3.465
3.465
32
1
Units
V
V
mA
mA
PI6C49X0208
Power Supply DC Characteristics
(
V
DD
/
V
DDO
= 2.5V ± 5%, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
2.375
2.375
Typ
2.5
2.5
Max.
2.625
2.625
15
0.7
Units
V
V
mA
mA
Power Supply DC Characteristics
(
V
DD
= 3.3V ± 5%,
V
DDO
= 2.5V ± 5%, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
3.135
2.375
Typ
3.3
2.5
Max.
3.465
2.625
29
0.6
Units
V
V
mA
mA
Power Supply DC Characteristics
(
V
DD
= 3.3V ± 5%,
V
DDO
= 1.8V ± 0.2V, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
3.135
1.6
Typ
3.3
1.8
Max.
3.465
2.0
29
0.4
Units
V
V
mA
mA
Power Supply DC Characteristics
(
V
DD
= 3.3V ± 5%,
V
DDO
= 1.5V ± 0.15V, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
3.135
1.35
Typ
3.3
1.5
Max.
3.465
1.65
29
0.3
Units
V
V
mA
mA
12-0308
3
PI6C49X0208
Rev A
01/08/13
High Performance 1:8 Multi-Voltage CMOS Buffer
Power Supply DC Characteristics
(
V
DD
= 2.5V ± 5%,
V
DDO
= 1.8V ± 0.2V, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
2.375
1.6
Typ
2.5
1.8
Max.
2.625
2.0
13
0.4
Units
V
V
mA
mA
PI6C49X0208
Power Supply DC Characteristics
(
V
DD
= 2.5V ± 5%,
V
DDO
= 1.5V ± 0.15V, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
2.375
1.35
Typ
2.5
1.5
Max.
2.625
1.65
13
0.3
Units
V
V
mA
mA
Power Supply DC Characteristics
(
V
DD
= 2.5V ± 5%,
V
DDO
= 1.2V ± 0.06V, T
A
= -40°C to 85°C)
Symbols
V
DD
V
DDO
I
DD
I
DDO
Parameters
Core Supply Voltage
Output Supply Voltage
Power Supply Current
Output Supply Current
ENABLE = '0'
ENABLE = '0'
Test Conditions
Min.
2.375
1.14
Typ
2.5
1.2
Max.
2.625
1.26
13
0.3
Units
V
V
mA
mA
Single-Ended input DC Characteristics
(T
A
= -40°C to 85°C)
Symbols
V
IH
V
IL
Parameters
Input High Voltage
Input Low Voltage
Test Conditions
V
DD
= 3.3V ± 5%
V
DD
= 2.5V ± 5%
V
DD
= 3.3V ± 5%
V
DD
= 2.5V ± 5%
V
DDO
= 3.3V ± 5%
(1)
Min.
2
1.7
-0.3
-0.3
2.6
2
1.8
1.5
1.0
0.7
2.6
0.5
0.4
0.35
0.2
Typ
Max.
V
DD
+ 0.3
V
DD
+ 0.3
0.8
0.7
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
OH
Output High Voltage
(I
OH
= -8mA)
V
DDO
= 2.5V ± 5%
V
DDO
= 1.8V ± 0.2V
(1)
V
DDO
= 1.2V ± 0.06V
V
DDO
= 3.3V ± 5%
(1)
V
DDO
= 2.5V ± 5%
V
DDO
= 2.5V ± 5%
(1)
V
DDO
= 1.5V ± 0.15V
(1)
Output High Voltage
(I
OH
= -1mA)
Output Low Voltage
V
OL
(I
OL
= 8mA)
Output Low Voltage
(I
OH
= 1mA)
V
DDO
= 1.5V ± 0.15V
(1)
V
DDO
= 1.2V ± 0.06V
V
DDO
= 1.8V ± 0.2V
(1)
Notes:
1. Outputs terminated with 50Ω to V
DDO
/2. See Parameter Measurement section, "Load Test Circuit" diagrams.
12-0308
4
PI6C49X0208
Rev A
01/08/13
High Performance 1:8 Multi-Voltage CMOS Buffer
Differential input DC Characteristics
(T
A
= -40°C to 85°C)
Symbols
I
IH
Parameters
Input High
Current
Input Low
Current
IN[0:1],
IN[0:1]#
IN[0:1]
IN[0:1]#
Test Conditions
V
DD
= V
IN
=3.465V
or 2.625V
V
DD
= 3.465V or
2.625V V
IN
= 0V
V
DD
= 3.465V or
2.625V V
IN
= 0V
V
DD
= 3.3V
V
DD
= 2.5V
V
DD
= 3.3V
V
DD
= 2.5V
-1
-50
0.25
0.25
0.5
0.5
1.3
1.3
V
DD
-1.35V
V
DD
-0.85V
Min.
Typ
Max.
100
Units
uA
uA
uA
V
V
PI6C49X0208
I
IL
V
PP
V
CMR
Peak-to-Peak Input Voltage
(1)
Common Mode Input Voltage
(1,2)
Notes:
1.
V
IL
should not be less than -0.3V.
2. Common mode voltage is defined as 1/2(
V
IH-
V
IL)
.
12-0308
5
PI6C49X0208
Rev A
01/08/13
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