74HCT4046AN,112 NXP Semiconductors, 74HCT4046AN,112 Datasheet - Page 27

• Manufacturer Part Number: 74HCT4046AN,112
• Description: IC PLL W/VCO 16-DIP
• Manufacturer: NXP Semiconductors
• Type: Phase Lock Loop (PLL)r
• Series: 74HCTr

Specifications of 74HCT4046AN,112

• Number Of Circuits: 1
• Package / Case: 16-DIP (0.300", 7.62mm)
• Pll: Yes
• Input: Clock
• Output: Clock
• Ratio - Input:output: 2:3
• Differential - Input:output: No/No
• Frequency - Max: 19MHz
• Divider/multiplier: No/No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Frequency-max: 19MHz
• 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: 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: 74HCT4046AN; 74HCT4046AN; 933809560112

Philips Semiconductors
1997 Nov 25
SUBJECT
PLL frequency
PLL locks on
noise rejection at
AC ripple content
capture range
signal input
when PLL is
locked
Phase-locked-loop with VCO
harmonics at
centre frequency
PHASE
COMPARATOR
PC1, PC2 or PC3
PC1 or PC3
PC2
PC1
PC2 or PC3
PC1
PC2
PC3
DESIGN CONSIDERATIONS
Loop filter component selection
A small capture range (2f
yes
no
high
low
f
f
f
r
r
r
(a) 1 = R3 x C2; (b) amplitude characteristic (c) pole-zero diagram
= 2f
= f
= f
(a)
i
i
, small ripple content at
, large ripple content at
Fig.28 Simple loop filter for PLL with offset; R3 + R4
i
Fig. 27 Simple loop filter for PLL without offset; R3 500 .
, large ripple content at
2 = R4 x C2;
3 = (R3 + R4) x C2
= R3 x C2 (b) amplitude characteristic (c) pole-zero diagram
27
c
) is obtained if
DEMOUT
DEMOUT
DEMOUT
= 180
= 0
= 90
2f
c
74HC/HCT4046A
1
-- - 2 f
Product specification
L
500 .