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IDT5T2010
2.5 V
DD
5 pairs of outputs
Low skew: 50ps same pair, 100ps all outputs
Selectable positive or negative edge synchronization
Tolerant of spread spectrum input clock
Synchronous output enable
Selectable inputs
Input frequency: 4.17MHz to 250MHz
Output frequency: 12.5MHz to 250MHz
1.8V / 2.5V LVTTL: up to 250MHz
HSTL / eHSTL: up to 250MHz
Hot insertable and over-voltage tolerant inputs
3-level inputs for selectable interface
3-level inputs for feedback divide selection with multiply ratios
of(1-6, 8, 10, 12)
Selectable HSTL, eHSTL, 1.8V/2.5V LVTTL, or LVEPECL input
interface
Selectable differential or single-ended inputs and ten single-
ended outputs
PLL bypass for DC testing
External differential feedback, internal loop filter
Low Jitter: <75ps cycle-to-cycle
Power-down mode
Lock indicator
Available in BGA and VFQFPN packages
DESCRIPTION:
The IDT5T2010 is a 2.5V PLL clock driver intended for high perfor-
mance computing and data-communications applications. The IDT5T2010
has ten outputs in five banks of two, plus a dedicated differential feedback.
The redundant input capability allows for a smooth change over to a
secondary clock source when the primary clock source is absent.
The feedback bank allows divide-by-functionality from 1 to 12 through
the use of the DS[1:0] inputs. This provides the user with frequency
multiplication 1 to 12 without using divided outputs for feedback. Each output
bank also allows for a divide-by functionality of 2 or 4.
The IDT5T2010 features a user-selectable, single-ended or differential
input to ten single-ended outputs. The clock driver also acts as a translator from
a differential HSTL, eHSTL, 1.8V/2.5V LVTTL, LVEPECL, or single-ended
1.8V/2.5V LVTTL input to HSTL, eHSTL, or 1.8V/2.5V LVTTL outputs.
Selectable interface is controlled by 3-level input signals that may be hard-wired
to appropriate high-mid-low levels. The outputs can be synchronously
enabled/disabled.
Furthermore, when PE is held high, all the outputs are synchronized with
the positive edge of the REF clock input. When PE is held low, all the outputs
are synchronized with the negative edge of REF.
FUNCTIONAL BLOCK DIAGRAM
1sOE
OMODE
TxS
Divide
Select
1
Q
0
1
Q
1
1F
2:1
2sOE
PD
PE
FS
LOCK
PLL_EN
Divide
Select
2
Q
0
2
Q
1
FB
FB/
V
REF2
3
/N
3
PLL
0
3F
2:1
0
1
Divide
Select
4sOE
4
Q
0
4
Q
1
2F
2:1
Divide
Select
3sOE
3
Q
0
3
Q
1
DS
1:0
REF
0
REF
0
/
V
REF0
RxS
1
REF
1
REF
1
/
V
REF1
REF_SEL
4F
2:1
5sOE
Divide
Select
5
Q
0
5
Q
1
5F
2:1
Divide
Select
Q
FB
Q
FB
FBF
2:1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2004
Integrated Device Technology, Inc.
MAY 2003
DSC 5981/24