PI6C41204
PI6C41204A
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LVCMOS to LVPECL Driver
Features
Description
• Up to Four LVPECL outputs
PI6C41204 & PI6C41204A are high-performance LVCMOS or
LVTTL to LVPECL clock buffers. The PI6C41204 is a 4 output
version with 2 selectable inputs, pin compatible with ICS8535-01.
PI6C41204A is the enhanced version with extra power and
ground pins to minimize noise and jitter.
•
•
•
•
•
•
•
Selectable CLK0 or CLK1 inputs
LVCMOS or LVTTL input level
30ps max output skew
150ps max part-to-part skew
1.9ns max propagation delay
266 MHz output frequency
Packaging (Pb-free & Green available):
- 20-pin TSSOP
Pin Configuration PI6C41204/A
Block Diagram PI6C41204/A
D
CLK_EN
LE
CLK0
0
CLK1
1
Vee
CLK_EN
CK_SEL
CLK0
nc/Vee
CLK1
nc/Vee
nc/Vee
nc/Vcc
Vcc
Q
Q0
nQ0
Q1
CLK_SEL
nQ1
Q2
nQ2
Q3
nQ3
08-0304
1
1
20
2
19
3
18
4
5
17
20-Pin
16
6
15
7
14
8
13
9
12
10
11
Q0
nQ0
Vcc
Q1
nQ1
Q2
nQ2
Vcc
Q3
nQ3
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Table 1a. Pin Description for PI6C41204
N umbe r
N a me
Type
D e s criptio n
1
Vee
P o wer
2
C LK _EN
Inp ut
P ullup
3
C LK _S EL
Inp ut
P ulld o wn
C lo ck select inp ut: LO W = C LK 0 , HIGH = C LK 1 LVC MO S
o r LVTTL inp ut level.
4
C LK 0
Inp ut
P ulld o wn
LVC MO S o r LVTTL clo ck inp ut.
6
C LK 1
Inp ut
P ulld o wn
LVC MO S o r LVTTL inp ut level.
5, 7, 8, 9
NC
Unused
N o C o nnect
10, 13, 18
Vcc
P o wer
3 . 3 V sup p ly
11, 12
nQ 3 , Q 3
O utp ut
LVP EC L o utp ut p air.
14, 15
nQ 2 , Q 2
O utp ut
LVP EC L o utp ut p air.
16, 17
nQ 1, Q 1
O utp ut
LVP EC L o utp ut p air.
19, 20
nQ 0 , Q 0
O utp ut
LVP EC L o utp ut p air.
Gro und .
S ynchro nizing clo ck enab le. When HIGH, clo ck o utp uts fo llo w
clo ck inp ut. When LO W, Q are lo w, nQ are high. LVC MO S o r
LVTTL inp ut level.
Table 1b. Pin Description for PI6C41204A
N umbe r
N a me
1, 5, 7, 8
Vee
P o wer
2
C LK _EN
Inp ut
P ullup
3
C LK _S EL
Inp ut
P ulld o wn
C lo c k select inp ut: LO W = C LK 0 , HIGH = C LK 1 LVC MO S
o r LVTTL inp ut level
4
C LK 0
Inp ut
P ulld o wn
LVC MO S o r LVTTL clo ck inp ut.
6
C LK 1
Inp ut
P ulld o wn
LVC MO S o r LVTTL inp ut level.
9, 10, 13,
18
Vcc
P o wer
3 . 3 V sup p ly
11, 12
nQ 3 , Q 3
O utp ut
LVP EC L o utp ut p air.
14, 15
nQ 2 , Q 2
O utp ut
LVP EC L o utp ut p air.
16, 17
nQ 1, Q 1
O utp ut
LVP EC L o utp ut p a ir.
19, 20
nQ 0 , Q 0
O utp ut
LVP EC L o utp ut p air.
08-0304
Type
D e s criptio n
Gro und .
S ynchro nizing clo ck enab le. When HIGH, clo ck o utp uts fo llo w
clo ck inp ut. When LO W, Q are lo w, nQ are high. LVC MO S o r
LVTTL inp ut level.
2
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Table 2. Pin Characteristics
S y mbo l
Pa ra me te r
Te s t Co nditio ns
M in.
C LK 0 ,
C LK 1
C IN
Ty p.
pF
C LK _ EN
C LK _ S EL
Inp ut P ullup Resisto r
RP ULLDO WN
Inp ut P ulld o wn
Resisto r
Units
3.2
Inp ut C ap acitance
RP ULLUP
M ax.
2.7
80
K o hm
80
Table 3a. Control Input Function Table
Inputs
Outputs
CLK_EN
CLK_SEL
Se le cte d Source
Q0 thru Q3*
nQ0 thru nQ3*
0
0
CLK0
Disabled ; LOW
Disabled ; HIGH
0
1
CLK1
Disabled ; LOW
Disabled ; HIGH
1
0
CLK0
Enabled
Enabled
1
1
CLK1
Enabled
Enabled
After CLK_EN switches, the clock outputs are disabled or enabled following
a rising and falling input clock edge as shown in figure1. In the active mode, the state
of the outputs are a function of the CLK0 and CLK1 inputs as described in Table 3b.
08-0304
3
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Disabled
Enabled
CLK0, CLK1
CLK_EN
nQ0 - nQ3*
Q0 - Q3*
Figure 1. CLK_EN Timing Diagram
Table 3b. Clock Input Function Table
Inputs
Outputs
CLK0 or CLK1
Q0 thru Q3*
nQ0 thru nQ3*
0
LOW
HIGH
1
HIGH
LOW
Note:
*PI6C41204 and PI6C41204A have four differential outputs. Q0 through Q3 and nQ0 through nQ3.
PI6C41202 has two differential outputs. Q0 through Q1 and nQ0 through nQ1.
08-0304
4
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Note:
Stresses greater than those listed under 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.
Storage Temperature ...................................................................–65°C to +150°C
Ambient Temperature with Power Applied .................................. –40°C to +85°C
Supply Voltage, VCC .................................................................................................. +4.6V
Input/Output Voltage ........................................................... –0.5V to VCC + 0.5V
Table 4a. Operating Conditions (Commercial)
Symbol
Parame te r
M in.
Typ.
M a x.
Units
VCC
Supply Voltage
3.135
3.3
3.465
V
IEE
Supply Current
50
mA
TA
Ambient Temperature
70
°C
0
Table 4b. LVCMOS/LVTTL DC Characteristics, (VCC = 3.3V ± 5%, TA = 0°C to +70°C)
Symbol
VIH
Parame te r
Input High Voltage
Te s t Conditions
M in.
Typ.
M a x.
CLK0,CLK1
2
3.765
CLK_EN
CLK_SEL
2
3 . 7 65
Units
V
VIL
IIH
IIL
08-0304
Input Low Voltage
Input High Current
Input Low Current
CLK0, CLK1
— 0. 3
0. 8
CLK_EN
CLK_SEL
— 0.3
0. 8
CLK0,CLK1
CLK_SEL
VIN = VCC = 3.465V
150
CLK_EN
VIN = VCC = 3.465V
5
μA
CLK0, CLK1
CLK_SEL
VIN =0V, VCC = 3.465V
—5
CLK_EN
VIN =0V, VCC = 3.465V
— 150
5
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Table 4c. LVPECL DC Characteristics (V CC = 3.3V ± 5%, TA = 0°C to +70°C)
S y mbo l
Pa ra me te r
Te s t Co nditio ns
M in.
Ty p.
M ax.
VO H
O utp ut High Vo ltage
N o te 1
VC C - 1 . 4
VC C - 1 . 0
VO L
O utp ut Lo w Vo ltage
N o te 1
VC C - 2 . 0
VC C - 1 . 7
VS WIN G
P eak - to - P eak O utp ut
Vo ltage S wing
0.6
0.85
Units
V
Note:
1. Outputs terminated with 50ohm to VCC - 2V
Table 5. AC Characteristics, (V CC = 3.3V ± 5%, TA = 0°C to +70°C (Note 3)
S ymbo l
Pa ra me te r
Te s t Co nditio ns
fMAX
Maximum Inp ut F req uency
tPLH
P ro p agatio n Delay Lo w to High :
N o te 4
tPHL
P ro p agatio n Delay High to Lo w :
N o te 4
ts ( o )
O utp ut S kew : N o te 5
ts k ( p p )
P a r t to P a r t S k e w : N o te 6
tDC
O utp ut Duty C ycle
48
t r /tf
O utp ut Rise / F all time
2 0 % to 8 0 %
100
VC C to VO X
M in.
Typ.
1.0
M ax.
Units
266
MHz
1.9
ns
VC C to VO X
1.0
1.9
11
30
ps
150
50
52
%
400
ps
Notes:
3. All parameters measured at 266MHz unless noted otherwise. The part does not add jitter.
4. Measured from the VDD/2 point of the input to the differential output crossing point.
5. Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the output crossing points differential.
6. Defined as skew between outputs on different devices operating at the same supply voltages and
with equal load conditions. Measured at the output crossing points differential.
08-0304
6
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Table 5a. Operating Conditions (Industrial)
Symbol
Parame te r
M in.
Typ.
M a x.
Units
VCC
Supply Voltage
3.135
3.3
3.465
V
IEE
Supply Current
50
mA
TA
Ambient Temperature
85
°C
–40
Table 5b. LVCMOS/LVTTL DC Characteristics, (VCC = 3.3V ± 5%, TA = –40°C to +85°C)
Symbol
VIH
Parame te r
Input High Voltage
Te s t Conditions
M in.
Typ.
M a x.
CLK0,CLK1
2
3.765
CLK_EN
CLK_SEL
2
3 . 7 65
Units
V
VIL
IIH
IIL
08-0304
Input Low Voltage
Input High Current
Input Low Current
CLK0, CLK1
— 0. 3
0. 8
CLK_EN
CLK_SEL
— 0.3
0. 8
CLK0,CLK1
CLK_SEL
VIN = VCC = 3.465V
150
CLK_EN
VIN = VCC = 3.465V
5
μA
CLK0, CLK1
CLK_SEL
VIN =0V, VCC = 3.465V
—5
CLK_EN
VIN =0V, VCC = 3.465V
— 150
7
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Table 5c. LVPECL DC Characteristics (V CC = 3.3V ± 5%, TA = –40°C to +85°C)
S y mbo l
Pa ra me te r
Te s t Co nditio ns
M in.
Ty p.
M ax.
VO H
O utp ut High Vo ltage
N o te 1
VC C - 1 . 4
VC C - 1 . 0
VO L
O utp ut Lo w Vo ltage
N o te 1
VC C - 2 . 0
VC C - 1 . 7
VS WIN G
P eak - to - P eak O utp ut
Vo ltage S wing
0.6
0.85
Units
V
Note:
1. Outputs terminated with 50ohm to VCC - 2V
Table 6. AC Characteristics, (V CC = 3.3V ± 5%, TA = –40°C to +85°C, See Note 3)
S ymbo l
Pa ra me te r
Te s t Co nditio ns
fMAX
Maximum Inp ut F req uency
tPLH
P ro p agatio n Delay Lo w to High :
N o te 4
tPHL
P ro p agatio n Delay High to Lo w :
N o te 4
ts ( o )
O utp ut S kew : N o te 5
ts k ( p p )
P a r t to P a r t S k e w : N o te 6
tDC
O utp ut Duty C ycle
45
tr/tf
O utp ut Rise / F all time
2 0 % to 8 0 %
100
VCC to VOX
M in.
Typ.
1.0
M ax.
Units
266
MHz
1.9
ns
VCC to VOX
1.0
1.9
11
100
ps
150
50
55
%
400
ps
Notes:
3. All parameters measured at 266MHz unless noted otherwise. The part does not add jitter.
4. Measured from the VDD/2 point of the input to the differential output crossing point.
5. Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the output crossing points differential.
6. Defined as skew between outputs on different devices operating at the same supply voltages and
with equal load conditions. Measured at the output crossing points differential.
08-0304
8
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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VCC
SCOPE
Z = 50-Ohm
Qx
LVPECL
50-Ohm
VCC = 2V
Z = 50-Ohm
nQx
50-Ohm
VEE = -1.3V ± 0.165V
Figure2. 2-3.3V Output Load Test Circuit
Qx
Qx
Part 1
nQx
nQx
Qy
Qy
Part 2
nQy
nQy
tsk(0)
tsk(0)
Figure 4. Part-to-Part Skew
Figure 3. Output Skew
80%
80%
CLK0, CLK1
VSWING
Clock Inputs
and Outputs
Q0, Q3
20%
20%
nQ0, nQ3
tF
tR
tPD
Figure 5. Input and Output Rise and Fall Time
Figure 6. Propagation Delay
nQ0, nQ3
Q0, Q3
Pulse Width
tPERIOD
odc = tPW
tPERIOD
Figure 7. odc & tPERIOD
08-0304
9
PS8626E
11/18/08
PI6C41204/PI6C41204A
LVCMOS
to LVPECL Driver
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Packaging Mechanical: 20-Pin TSSOP (L)
20
.169
.177
4.3
4.5
1
.252
.260
6.4
6.6
.0256
BSC
0.65
.004 0.09
.008 0.20
.047
1.20
Max
.007
.012
0.19
0.30
0.45
0.75
SEATING
PLANE
.018
.030
.238
.269
6.1
6.7
.002 0.05
.006 0.15
Ordering Information
Ordering Code
PI6C41204L
PI6C41204LE
I6C41204LIE
PI6C41204ALE
Package Code
L
L
L
L
Package Type
20-pin 173-mil TSSOP
Pb-free & Green, 20-pin 173-mil TSSOP
Pb-free & Green, 20-pin 173-mil TSSOP
Pb-free & Green, 20-pin 173-mil TSSOP
Operating Temperature
Commercial
Commercial
Industrial
Commercial
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
08-0304
10
PS8626E
11/18/08
