74HCT9046AD,118 NXP Semiconductors, 74HCT9046AD,118 Datasheet - Page 35

• Manufacturer Part Number: 74HCT9046AD,118
• Description: IC PLL BAND GAP CNTRL VCO 16SOIC
• Manufacturer: NXP Semiconductors
• Type: Phase Lock Loop (PLL)r
• Series: 74HCTr

Specifications of 74HCT9046AD,118

• Number Of Circuits: 1
• Package / Case: 16-SOIC (3.9mm Width)
• Pll: Yes
• Input: Clock
• Output: Clock
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 16MHz
• Divider/multiplier: No/No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Frequency-max: 16MHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 4.5 V to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1570-2; 74HCT9046AD-T; 935044180118

NXP Semiconductors
74HCT9046A_6
Product data sheet
Rewriting the equation for natural frequency results in:
The maximum overshoot occurs at N
When C2 = 470 nF, it follows:
Hence the current source bias resistance
With
For extra ripple suppression a capacitor C3 can be connected in parallel with R4, with an
extra
For stability reasons
R3‘
R
R4
1
1
2
bias
n
=
=
=
=
=
=
K
-------------------------------- -
0.4 2.24 10
-------------------------------------- -
-------------------------
0.5 5000
=
5
-- -
------ -
C2
t
3
= 0.707 (0.5
------ -
C2
p
2
5000
0.707
= R4
17 2550
=
1
=
K
------------ -
0.001
=
n
v
2
5
------------------------- -
470 10
2
------------------------- -
470 10
0.00028
C3.
K
0.0012
30
=
=
n
=
0.00028
6
5 10
43 k
Rev. 06 — 15 September 2009
9 –
=
3
9 –
2
should be < 0.1
=
0.0012
=
3
600
r s
2550
n
) it follows:
max
2
= 30; hence K
, hence C3 < 0.1C2 or C3 = 39 nF.
PLL with band gap controlled VCO
n
=
1
30:
74HCT9046A
© NXP B.V. 2009. All rights reserved.
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