IDT
TM
/ICS
TM
DDR I/DDR II Phase Lock Loop Zero Delay Buffer ICS9P935 REV H 12/1/08
ICS9P935
DDR I/DDR II Phase Lock Loop Zero Delay Buffer
4
Notes:
1. Unused inputs must be held high or low to prevent them from floating.
2. DC input signal voltage specifies the allowable DC execution of differential input.
3. Differential inputs signal voltages specifies the differential voltage [VTR-VCP] required
for switching, where VTR is the true input level and VCP is the complementary input
level.
4. Differential cross-point voltage is expected to track variations of V
DD
and is the voltage
at which the differential signal must be crossing.
Recommended Operating Condition
(
see note1
)
T
A
= 0 - 70°C; Supply Voltage AVDD, VDD = 1.8 V +/- 0.1V (unless otherwise stated)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
DDQ
, A
VD
D
1.7 1.8 1.9 V
Low level input voltage V
IL
CLK_INT, CLK_INC, FB_IN 0.35 x V
D
D
V
High level input voltage V
IH
CLK_INT, CLK_INC, FB_IN 0.65 x V
DD
V
DC input signal voltage (note 2) V
IN
-0.3 V
DD
+ 0.3 V
DC input si
g
nal volta
g
e swin
g
V
IN-Diff
CLK_INT, CLK_INC GND - 0.3
1.5 V
D
D
+ 0.3 V
DC - CLK_INT, CLK_INC,
FB_IN
0.3 V
DD
+ 0.4 V
AC - CLK_INT, CLK_INC,
FB_IN
0.6 V
DD
+ 0.4 V
Output differential cross-voltage
(note 4)
V
OX
V
DD
/ 2 - 0.1 V
DD
/ 2 + 0.1 V
Input differential cross-voltage
(note 4)
V
IX
V
DD
/2 - 0.15 V
DD
/2 V
DD
/ 2 + 0.15 V
High level output current I
OH
-9 mA
Low level output current I
OL
9mA
High Impedance
Output Current
I
OZ
V
DD
=1.9V, V
OUT
=V
DD
or GND
±
10 mA
Operating free-air temperature T
A
070°C
Differential input signal voltage
(note 3)
V
ID
IDT
TM
/ICS
TM
DDR I/DDR II Phase Lock Loop Zero Delay Buffer ICS9P935 REV H 12/1/08
ICS9P935
DDR I/DDR II Phase Lock Loop Zero Delay Buffer
5
Notes:
1. Refers to transition on noninverting output in PLL bypass mode.
2. While the pulse skew is almost constant over frequency, the duty cycle error increases at
higher frequencies. This is due to the formula: duty cycle=t
wH
/t
c
, were the cycle (t
c
)
decreases as the frequency goes up.
3. Switching characteristics guaranteed for application frequency range.
4. Static phase offset shifted by design.
Timing Requirements
T
A
= 0 - 70°C Supply Voltage AVDD, VDD = 1.8 V +/- 0.1V (unless otherwise stated)
PARAMETER SYMBOL
CONDITIONS
MIN MAX UNITS
Max clock frequency freq
op
1.8V+0.1V @ 25°C
125 500 MHz
Application Frequency
Range
freq
App
1.8V+0.1V @ 25°C 160 400 MHz
Input clock duty cycle d
tin
40 60 %
CLK stabilization T
STAB
15 µs
Switching Characteristics
1
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Output enable time t
en
OE to any output 8 ns
Output disable time t
dis
OE to any output 8 ns
Period jitter t
j
it
(p
er
)
-40 40 ps
Half-period jitter t
j
it
(
h
p
er
)
-75 75 ps
Input Clock 1 2.5 4 v/ns
Output Enable (OE), (OS) 0.5 v/ns
Output clock slew rate
SLr1
(
o
)
1.5 2.5 3 v/ns
t
it
cc+
040ps
t
j
it
(
cc-
)
0 -40 ps
Dynamic Phase Offset t
(
)
d
y
n
-50 50 ps
Phase error
t
(p
hase error
)
2
-50 0 50 ps
Output to Output Skew t
skew
40 ps
SSC modulation frequency 30.00 33 kHz
SSC clock input frequency deviation 0.00 -0.50 %
Cycle-to-cycle period jitter
Input slew rate
SLr1(i)
IDT
TM
/ICS
TM
DDR I/DDR II Phase Lock Loop Zero Delay Buffer ICS9P935 REV H 12/1/08
ICS9P935
DDR I/DDR II Phase Lock Loop Zero Delay Buffer
6
Electrical Characteristics - Input/Supply/Common Output Parameters
T
A
= 0 - 70°C; Supply Voltage A
VDD
, V
DD
= 2.5V ± 0.2V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input High Current I
IH
V
I
= V
DD
or GND 5 µA
Input Low Current I
IL
V
I
= V
DD
or GND 5 µA
I
DD2. 5
C
L
= 0pf @ 200MHz 250 mA
I
DDPD
C
L
= 0pf 100 µA
Output High Current I
OH
V
DD
= 2.3V, V
OU
T
= 1V -18 -32 mA
Output Low Current I
OL
V
DD
= 2.3V, V
OUT
= 1.2V 26 35 mA
High Impedance
Out
p
ut Current
I
OZ
V
DD
=2.7V, Vout=V
DD
or GND ±10 mA
Input Clamp Voltage V
IK
V
DDQ
= 2.3V Iin = -18mA -1.2
V
V
DD
= min to max,
I
OH
= -1 mA
V
DDQ
- 0.1 V
V
DDQ
= 2.3V,
I
OH
= -12 mA
1.7 V
V
DD
= min to max
I
OL
=1 mA
0.1 V
V
DDQ
= 2.3V
I
OH
=12 mA
0.6 V
Input Capacitance
1
C
IN
V
I
= GND or V
DD
3pF
Output Capacitance
1
C
OUT
V
OUT
= GND or V
DD
3pF
Operating Supply
Current
High-level output
voltage
V
OH
Low-level output voltage V
OL

9P935AFLFT

Mfr. #:
Manufacturer:
IDT
Description:
Clock Buffer PC BUFFER
Lifecycle:
New from this manufacturer.
Delivery:
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