ICS85357-01
4:1
OR
2:1
D
IFFERENTIAL
-
TO
-3.3V LVPECL / ECL C
LOCK
M
ULTIPLEXER
NRND – Not Recommend for New Designs - 6/28/2013
For New Designs use ICS853S057AGILF
G
ENERAL
D
ESCRIPTION
The ICS85357-01 is a 4:1 or 2:1 Differential-to-3.3V
LVPECL / ECL clock multiplexer which can operate up to
750MHz. The ICS85357-01 has 4 selectable clock inputs.
The CLK, nCLK pair can accept most standard differential
input levels. The device can operateusing a 3.3V LVPECL
(V
EE
= 0V, V
CC
= 3.135V to 3.465V) or 3.3V ECL (V
CC
= 0V, V
EE
= -3.135V to -3.465V). The fully differential architecture and
low propagation delay make itideal for use in clock
distribution circuits. The select pins have internal pulldown
resistors. Leaving one input unconnected (pulled to logic
low by the internal resistor) will transformthe device into a
2:1 multiplexer. The SEL1 pin is the most significant bit and
the binary number applied to the select pins will select the
same numbered data input (i.e., 00selects CLK0, nCLK0).
F
EATURES
•
High speed differential multiplexer. The device can be
configured as either a 4:1 or 2:1 multiplexer
•
One differential 3.3V LVPECL output
•
Four selectable CLK, nCLK inputs
•
CLK, nCLK pair can accept the following differential
input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
•
Maximum output frequency: 750MHz
•
Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nCLKx input
•
Part-to-part skew: 150ps (maximum)
•
Propagation delay: 1.5ns (maximum)
•
LVPECL mode operating voltage supply range:
V
CC
= 3.135V to 3.465V, V
EE
= 0V
•
ECL mode operating voltage supply range:
V
CC
= 0V, V
EE
= -3.135V to -3.465V
•
0°C to 70°C ambient operating temperature
•
Lead-Free package fully RoHS compliant
B
LOCK
D
IAGRAM
CLK0
nCLK0
CLK1
nCLK1
CLK2
nCLK2
CLK3
nCLK3
00
P
IN
A
SSIGNMENT
V
CC
CLK0
nCLK0
CLK1
nCLK1
CLK2
nCLK2
CLK3
nCLK3
V
EE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
SEL1
SEL0
V
CC
Q0
nQ0
V
CC
nc
nc
V
EE
01
Q0
nQ0
10
11
ICS85357-01
SEL1 SEL0
20-Lead TSSOP
4.40mm x 6.50mm x 0.90mm body package
G Package
Top View
85357AG-01
www.idt.com
1
REV. C SEPTEMBER 16, 2013
ICS85357-01
4:1
OR
2:1
D
IFFERENTIAL
-
TO
-3.3V LVPECL / ECL C
LOCK
M
ULTIPLEXER
T
ABLE
1. P
IN
D
ESCRIPTIONS
Number
1, 14,
17, 20
2
3
4
5
6
7
8
9
10, 11
12, 13
15, 16
18
19
Name
V
CC
CLK0
nCLK0
CLK1
nCLK1
CLK2
nCLK2
CLK3
nCLK3
V
EE
nc
nQ0, Q0
SEL0
SEL1
Power
Input
Input
Input
Input
Input
Input
Input
Input
Power
Unused
Output
Input
Input
Pulldown
Pulldown
Pulldown
Pullup
Pulldown
Pullup
Pulldown
Pullup
Pulldown
Pullup
Type
Description
Positive supply pins.
Non-inver ting differential clock input.
Inver ting differential clock input.
Non-inver ting differential clock input.
Inver ting differential clock input.
Non-inver ting differential clock input.
Inver ting differential clock input.
Non-inver ting differential clock input.
Inver ting differential clock input.
Negative supply pins.
No connect.
Differential output pairs. LVPECL interface levels.
Clock select input. LVCMOS / LVTTL interface levels.
Clock select input. LVCMOS / LVTTL interface levels.
NOTE:
Pullup
and
Pulldown
refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
T
ABLE
2. P
IN
C
HARACTERISTICS
Symbol
C
IN
R
PULLUP
R
PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
T
ABLE
3. C
ONTROL
I
NPUT
F
UNCTION
T
ABLE
Inputs
SEL1
0
0
1
1
SEL0
0
1
0
1
Clock Out
CLK
CLK0, nCLK0
CLK1, nCLK1
CLK2, nCLK2
CLK3, nCLK3
85357AG-01
www.idt.com
2
REV. C SEPTEMBER 16, 2013
ICS85357-01
4:1
OR
2:1
D
IFFERENTIAL
-
TO
-3.3V LVPECL / ECL C
LOCK
M
ULTIPLEXER
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
Inputs, V
I
Outputs, I
O
Continuous Current
Surge Current
Package Thermal Impedance,
θ
JA
Storage Temperature, T
STG
4.6V
-0.5V to V
CC
+ 0.5V
50mA
100mA
73.2°C/W (0 lfpm)
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions be-
yond those listed in the
DC Characteristics
or
AC Character-
istics
is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
T
ABLE
4A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
CC
I
EE
Parameter
Positive Supply Voltage
Power Supply Current
Test Conditions
Minimum
3.135
Typical
3.3
Maximum
3.465
35
Units
V
mA
T
ABLE
4B. LVCMOS / LVTTL DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
IH
V
IL
I
IH
I
IL
Parameter
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
SEL0, SEL1
SEL0, SEL1
SEL0, SEL1
SEL0, SEL1
V
CC
= V
IN
= 3.465V
V
CC
= 3.465V, V
IN
= 0V
-5
Test Conditions
Minimum
2
-0.3
Typical
Maximum
3.765
0.8
150
Units
V
V
µA
µA
T
ABLE
4C. D
IFFERENTIAL
DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
Parameter
CLK0, CLK1,
CLK2, CLK3
Test Conditions
V
CC
= V
IN
= 3.465V
Minimum
Typical
Maximum
150
5
Units
µA
µA
µA
µA
1.3
V
CC
- 0.85
V
V
nCLK0, nCLK1,
V
CC
= V
IN
= 3.465V
nCLK2, nCLK3
CLK0, CLK1,
-5
V
CC
= 3.465V, V
IN
= 0V
CLK2, CLK3
I
IL
Input Low Current
nCLK0, nCLK1,
V
CC
= 3.465V, V
IN
= 0V
-150
nCLK2, nCLK3
V
PP
Peak-to-Peak Voltage
0.15
Common Mode Input Voltage;
V
CMR
V
EE
+ 0.5
NOTE 1, 2
NOTE 1: Common mode input voltage is defined as V
IH
.
NOTE 2: For single ended applications, the maximum input voltage for CLKx, nCLKx is V
CC
+ 0.3V.
I
IH
Input High Current
85357AG-01
www.idt.com
3
REV. C SEPTEMBER 16, 2013
ICS85357-01
4:1
OR
2:1
D
IFFERENTIAL
-
TO
-3.3V LVPECL / ECL C
LOCK
M
ULTIPLEXER
T
ABLE
4D. LVPECL DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
OH
V
OL
V
SWING
Parameter
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
Test Conditions
Minimum
V
CC
- 1.4
V
CC
- 2.0
0.6
Typical
Maximum
V
CC
- 0.9
V
CC
-1.7
1.0
Units
V
V
V
NOTE 1: Outputs terminated with 50
Ω
to V
CC
- 2V.
T
ABLE
5. AC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
f
MAX
t
PD
Parameter
Maximum Output Frequency
Propagation Delay; NOTE 1
Par t-to-Par t Skew; NOTE 2, 3
Output Rise/Fall Time
20% to 80% @50MHz
300
400
IJ 750MHz
1
1.2
Test Conditions
Minimum
Typical
Maximum
750
1.5
150
700
Units
MHz
ns
ps
ps
%
t
sk(pp)
t
R
/ t
F
odc
Output Duty Cycle
47
53
All parameters measured at 500MHz unless noted otherwise.
NOTE 1: Measured from the differential input crossing point to the differential output crossing point.
NOTE 2: Defined as skew between outputs on different devices operating at the same supply voltages and
with equal load conditions. Using the same type of inputs on each device, the outputs are measured
at the differential cross points.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
85357AG-01
www.idt.com
4
REV. C SEPTEMBER 16, 2013
ICS85357-01
4:1
OR
2:1
D
IFFERENTIAL
-
TO
-3.3V LVPECL / ECL C
LOCK
M
ULTIPLEXER
P
ARAMETER
M
EASUREMENT
I
NFORMATION
2V
V
CC
Qx
SCOPE
V
CC
LVPECL
V
EE
nQx
nCLK0:
nCLK3
V
CLK0:
CLK3
PP
Cross Points
V
CMR
-1.3V ± 0.165V
V
EE
3.3V O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
D
IFFERENTIAL
I
NPUT
L
EVEL
nQx
PART 1
Qx
nQy
PART 2
Qy
tsk(pp)
nCLK0:
nCLK3
CLK0:
CLK3
nQ0
Q0
t
PD
P
ART
-
TO
-P
ART
S
KEW
P
ROPAGATION
D
ELAY
nQ0
80%
Clock
Outputs
80%
V
SW I N G
20%
t
R
t
F
20%
Q0
Pulse Width
t
PERIOD
odc =
t
PW
t
PERIOD
O
UTPUT
R
ISE
/F
ALL
T
IME
85357AG-01
O
UTPUT
D
UTY
C
YCLE
/P
ULSE
W
IDTH
/P
ERIOD
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5
REV. C SEPTEMBER 16, 2013
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