IDT5V9950PFI IDT, Integrated Device Technology Inc, IDT5V9950PFI Datasheet - Page 3

• Manufacturer Part Number: IDT5V9950PFI
• Description: IC CLK DVR PLL 1:8 200MHZ 32TQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: TurboClock™ II JRr
• Type: Driver, PLLr

Specifications of IDT5V9950PFI

• Pll: Yes with Bypass
• Input: LVTTL
• Output: LVTTL
• Number Of Circuits: 1
• Ratio - Input:output: 1:8
• Differential - Input:output: No/No
• Frequency - Max: 200MHz
• Divider/multiplier: Yes/Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFP, 32-VQFP
• Frequency-max: 200MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 5V9950PFI; 800-1993; IDT5V9950PFI

PROGRAMMABLE SKEW
for PCB trace delays, backplane propagation delays or to accommodate
requirements for special timing relationships between clocked compo-
nents. Skew is selectable as a multiple of a time unit (t
from 625ps to 1.3ns (see Programmable Skew Range and Resolution
Table). There are nine skew configurations available for each output
pair. These configurations are chosen by the nF
PROGRAMMABLE SKEW RANGE AND RESOLUTION TABLE
NOTES:
1. The device may be operated outside recommended frequency ranges without damage, but functional operation is not guaranteed.
2. The level to be set on FS is determined by the nominal operating frequency of the VCO and Time Unit Generator. The VCO frequency always appears at 1Q
3. Skew adjustment range assumes that a zero skew output is used for feedback. If a skewed Q output is used for feedback, then adjustment range will be greater. For example
EXTERNAL FEEDBACK
with regard to skew adjustment. The FB signal is compared with the
input REF signal at the phase detector in order to drive the VCO. Phase
differences cause the VCO of the PLL to adjust upwards or downwards
accordingly.
IDT5V9950
3.3V PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK II JR.
Output skew with respect to the REF input is adjustable to compensate
Timing Unit Calculation (t
VCO Frequency Range (F
Skew Adjustment Range
Max Adjustment:
Example 1, F
Example 2, F
Example 3, F
Example 4, F
Example 5, F
Example 6, F
Example 7, F
higher outputs when they are operated in their undivided modes. The frequency appearing at the REF and FB inputs will be the same as VCO when the output connected to
FB is undivided. The frequency of the REF and FB inputs will be 1/2 or 1/4 the VCO frequency when the part is configured for frequency multiplication by using a divided output
as the FB input.
if a 4t
applies to output pairs 3 and 4 where ± 6t
By providing external feedback, the IDT5V9950 gives users flexibility
U
skewed output is used for feedback, all other outputs will be skewed –4t
NOM
NOM
NOM
NOM
NOM
NOM
NOM
= 100MHz
= 150MHz
= 200MHz
= 25MHz
= 37.5MHz
= 50MHz
= 75MHz
(3)
U
)
NOM
)
(1,2)
U
skew adjustment is possible and at the lowest F
1:0
1/(32 x F
24 to 50MHz
t
t
control pins. In order
FS = LOW
t
U
U
±7.8125ns
±18.75%
U
= 0.833ns
= 0.625ns
±67.5°
= 1.25ns
—
—
—
—
U
) which ranges
NOM
)
U
in addition to whatever skew value is programmed for those outputs. ‘Max adjustment’ range
3
to minimize the number of control pins, 3-level inputs (HIGH-MID-LOW)
are used, they are intended for but not restricted to hard-wiring. Undriven
3-level inputs default to the MID level. Where programmable skew is
not a requirement, the control pins can be left open for the zero skew
default setting. The Control Summary Table shows how to select specific
skew taps by using the nF
phase detector. The loop filter transfer function has been chosen to
provide minimal jitter (or frequency variation) while still providing accu-
rate responses to input frequency changes.
An internal loop filter moderates the response of the VCO to the
1/(16 x F
48 to 100MHz
t
t
t
U
U
±7.8125ns
NOM
FS = MID
U
±37.5%
= 0.833ns
= 0.625ns
±135°
= 1.25ns
—
—
—
—
value.
NOM
)
1:0
96 to 200MHz
control pins.
1/(8 x F
t
t
FS = HIGH
t
U
U
±7.8125ns
U
INDUSTRIAL TEMPERATURE RANGE
= 0.833ns
= 0.625ns
±270°
±75%
= 1.25ns
—
—
—
—
NOM
)
% of Cycle Time
Phase Degrees
Comments
1:0
ns
, 2Q
1:0
, and the