IDT5V993A-7QGI IDT, Integrated Device Technology Inc, IDT5V993A-7QGI Datasheet - Page 3
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IDT5V993A-7QGI
Manufacturer Part Number
IDT5V993A-7QGI
Description
IC CLK DVR PLL 3.3V PROGR 28QSOP
Manufacturer
IDT, Integrated Device Technology Inc
Series
TurboClock™r
Type
PLL Clock Driverr
Datasheet
1.IDT5V993A-7QGI8.pdf
(8 pages)
Specifications of IDT5V993A-7QGI
Pll
Yes with Bypass
Input
LVTTL
Output
LVTTL
Number Of Circuits
1
Ratio - Input:output
1:8
Differential - Input:output
No/No
Frequency - Max
85MHz
Divider/multiplier
Yes/Yes
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-QSOP
Frequency-max
85MHz
Number Of Elements
1
Supply Current
76mA
Pll Input Freq (min)
3.75MHz
Pll Input Freq (max)
85MHz
Operating Supply Voltage (typ)
3.3V
Operating Temp Range
-40C to 85C
Package Type
QSOP
Output Frequency Range
3.75 to 85MHz
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Industrial
Pin Count
28
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
5V993A-7QGI
PLL 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. Selecting the appropriate FS value based on
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
CONTROL SUMMARY TABLE FOR FEEDBACK SIGNALS
NOTE:
1. LL disables outputs if TEST = MID and GND/sOE = HIGH.
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.
IDT5V993A
3.3V PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK
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
input frequency range allows the PLL to operate in its ‘sweet spot’ where jitter is lowest.
higher outputs when they are operated in their undivided modes. The frequency appearing at the REF and FB inputs will be the same as the 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 a 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 IDT5V993A gives users flexibility
U
skewed output is used for feedback, all other outputs will be skewed –4t
NOM
NOM
NOM
NOM
NOM
NOM
= 15MHz
= 25MHz
= 30MHz
= 40MHz
= 50MHz
= 80MHz
nF1:0
LL
M M
M H
H M
H H
LM
ML
LH
HL
(1)
(3)
U
)
NOM
)
(1,2)
U
skew adjustment is possible and at the lowest F
1/(44 x F
15 to 35MHz
FS = LOW
t
t
t
U
U
U
±9.09ns
±14%
= 1.52ns
= 0.91ns
= 0.76ns
±49°
—
—
—
NOM
)
Skew (Pair #1, #2)
U
Zero Skew
in addition to whatever skew value is programmed for those outputs. ‘Max adjustment’ range
–4t
–3t
–2t
–1t
1t
2t
3t
4t
3
U
U
U
U
U
U
U
U
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/(26 x F
25 to 60MHz
t
t
t
t
NOM
FS = MID
U
U
U
U
±9.23ns
±23%
= 1.54ns
= 1.28ns
= 0.96ns
= 0.77ns
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
±83°
—
—
value.
NOM
)
1/(16 x F
40 to 85 MHz
FS = HIGH
t
t
t
U
U
U
±9.38ns
±135°
±37%
= 1.56ns
= 1.25ns
= 0.78ns
—
—
—
NOM
)
Skew (Pair #3)
Divide by 2
Divide by 4
Zero Skew
–6t
–4t
–2t
2t
4t
6t
U
U
U
% of Cycle Time
U
U
U
Phase Degrees
Comments
ns
1:0
, 2Q
1:0
, and the