Texas Instruments CD74HCT4046AE, CD74HCT4046AM96, CD74HCT4046AM, CD74HC4046APWR, CD74HC4046AM96 Datasheet

[ /Title (CD74 HC404 6A, CD74 HCT40 46A) /Subject (HighSpeed CMOS

	CD74HC4046A,
Data sheet acquired from Harris Semiconductor	CD74HCT4046A
SCHS204	High-Speed CMOS Logic
February 1998	Phase-Locked-Loop with VCO

Features

•Operating Frequency Range

-Up to 18MHz (Typ) at VCC = 5V

-Minimum Center Frequency of 12MHz at VCC = 4.5V

•Choice of Three Phase Comparators

-EXCLUSIVE-OR

-Edge-Triggered JK Flip-Flop

-Edge-Triggered RS Flip-Flop

•Excellent VCO Frequency Linearity

•VCO-Inhibit Control for ON/OFF Keying and for Low Standby Power Consumption

•Minimal Frequency Drift

•Operating Power Supply Voltage Range

-VCO Section . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 6V

-Digital Section . . . . . . . . . . . . . . . . . . . . . . . . 2V to 6V

•Fanout (Over Temperature Range)

-Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

-Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

•Wide Operating Temperature Range . . . -55oC to 125oC

•Balanced Propagation Delay and Transition Times

•Significant Power Reduction Compared to LSTTL Logic ICs

•HC Types

-2V to 6V Operation

-High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V

•HCT Types

-4.5V to 5.5V Operation

-Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)

-CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

Description

The Harris CD74HC4046A and CD74HCT4046A are highspeed silicon-gate CMOS devices that are pin compatible with the CD4046B of the “4000B” series. They are specified in compliance with JEDEC standard number 7.

The CD74HC4046A and CD74HCT4046A are phase-locked- loop circuits that contain a linear voltage-controlled oscillator (VCO) and three different phase comparators (PC1, PC2 and PC3). A signal input and a comparator input are common to each comparator.

The signal input can be directly coupled to large voltage signals, or indirectly coupled (with a series capacitor) to small voltage signals. A self-bias input circuit keeps small voltage signals within the linear region of the input amplifiers. With a passive low-pass filter, the 4046A forms a second-order loop PLL. The excellent VCO linearity is achieved by the use of linear op-amp techniques.

Ordering Information

	TEMP.		PKG.
PART NUMBER	RANGE (oC)	PACKAGE	NO.
CD74HC4046AE	-55 to 125	16 Ld PDIP	E16.3
CD74HCT4046AE	-55 to 125	16 Ld PDIP	E16.3
CD74HC4046AM	-55 to 125	16 Ld SOIC	M16.15
CD74HCT4046AM	-55 to 125	16 Ld SOIC	M16.15
NOTES:

1.When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel.

2.Wafer and die for this part number is available which meets all electrical specifications. Please contact your local sales office or Harris customer service for ordering information.

Applications

•FM Modulation and Demodulation

•Frequency Synthesis and Multiplication

•Frequency Discrimination

•Tone Decoding

•Data Synchronization and Conditioning

•Voltage-to-Frequency Conversion

•Motor-Speed Control

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.		File Number 1854.1
Copyright © Harris Corporation 1998	1

CD74HC4046A, CD74HCT4046A

Pinout

CD74HC4046A, CD74HCT4046A

(PDIP, SOIC)

TOP VIEW

PCPOUT	1
PC1OUT	2
COMPIN	3
VCOOUT	4

INH	5
C1A	6

C1B

7

GND

8

16 VCC

15 PC3OUT

14

SIGIN

13	PC2OUT
12	R2

11 R1

10	DEMOUT
9	VCOIN

Functional Diagram

	3			2	PC1OUT
	COMPIN		φ	15	PC3OUT
	14			13
					PC2OUT
	SIGIN			1	PCPOUT
	6
	C1A
	7			4
	C1B
	11				VCOOUT
	R1		VCO
	12			10
	R2
	9				DEMOUT
	VCOIN
	5
	INH

Pin Descriptions

PIN NUMBER	SYMBOL	NAME AND FUNCTION
1	PCPOUT	Phase Comparator Pulse Output
2	PC1OUT	Phase Comparator 1 Output
3	COMPIN	Comparator Input
4	VCOOUT	VCO Output
5	INH	Inhibit Input
6	C1A	Capacitor C1 Connection A
7	C1B	Capacitor C1 Connection B
8	GND	Ground (0V)
9	VCOIN	VCO Input
10	DEMOUT	Demodulator Output
11	R1	Resistor R1 Connection
12	R2	Resistor R2 Connection
13	PC2OUT	Phase Comparator 2 Output
14	SIGIN	Signal Input
15	PC3OUT	Phase Comparator 3 Output
16	VCC	Positive Supply Voltage

2

CD74HC4046A, CD74HCT4046A

VREF

12 R2

R2

11 R1

R1

	10
R5	DEMOUT	-

C1

6 7 4

C1A C1B	OUT
	VCO

+

-	VCO

-+

+

INH VCOIN

5 9

3 14

COMPIN SIGIN

SD

Q

Q

RD

CC					UP
V				Q
			D

CP Q

RD

VCC D Q

CP Q DOWN

RD

FIGURE 1. LOGIC DIAGRAM

PC1OUT 2

PC3OUT 15

VCC

p

R3

13

PC2OUT C2

n

GND

1

PCPOUT

General Description

VCO

The VCO requires one external capacitor C1 (between C1A and C1B) and one external resistor R1 (between R1 and GND) or two external resistors R1 and R2 (between R1 and GND, and R2 and GND). Resistor R1 and capacitor C1 determine the frequency range of the VCO. Resistor R2 enables the VCO to have a frequency offset if required. See logic diagram, Figure 1.

The high input impedance of the VCO simplifies the design of low-pass filters by giving the designer a wide choice of resistor/capacitor ranges. In order not to load the low-pass filter, a demodulator output of the VCO input voltage is provided at pin 10 (DEMOUT). In contrast to conventional techniques where the DEMOUT voltage is one threshold voltage lower than the VCO input voltage, here the DEMOUT voltage

equals that of the VCO input. If DEMOUT is used, a load resistor (RS) should be connected from DEMOUT to GND; if

unused, DEMOUT should be left open. The VCO output (VCOOUT) can be connected directly to the comparator input (COMPIN), or connected via a frequency-divider. The VCO output signal has a guaranteed duty factor of 50%. A LOW level at the inhibit input (INH) enables the VCO and demodulator, while a HIGH level turns both off to minimize standby power consumption.

Phase Comparators

The signal input (SIGIN) can be directly coupled to the selfbiasing amplifier at pin 14, provided that the signal swing is between the standard HC family input logic levels. Capacitive coupling is required for signals with smaller swings.

Phase Comparator 1 (PC1)

This is an Exclusive-OR network. The signal and comparator input frequencies (fi) must have a 50% duty factor to obtain the maximum locking range. The transfer characteristic of PC1, assuming ripple (fr = 2fi) is suppressed, is:

VDEMOUT = (VCC/π) (φSIGIN - φCOMPIN) where VDEMOUT is the demodulator output at pin 10; VDEMOUT = VPC1OUT (via low-pass filter).

The average output voltage from PC1, fed to the VCO input via the low-pass filter and seen at the demodulator output at

pin 10 (VDEMOUT), is the resultant of the phase differences of signals (SIGIN) and the comparator input (COMPIN) as

shown in Figure 2. The average of VDEM is equal to 1/2 VCC when there is no signal or noise at SIGIN, and with this input

the VCO oscillates at the center frequency (fo). Typical waveforms for the PC1 loop locked at fo are shown in Figure 3.

3

CD74HC4046A, CD74HCT4046A

The frequency capture range (2fC) is defined as the frequency range of input signals on which the PLL will lock if it was initially out-of-lock. The frequency lock range (2fL) is defined as the frequency range of input signals on which the loop will stay locked if it was initially in lock. The capture range is smaller or equal to the lock range.

With PC1, the capture range depends on the low-pass filter characteristics and can be made as large as the lock range. This configuration retains lock behavior even with very noisy input signals. Typical of this type of phase comparator is that it can lock to input frequencies close to the harmonics of the VCO center frequency.

VCC

VDEMOUT (AV)

1/2 VCC

0

0o

90o

φDEMOUT

180o

FIGURE 2. PHASE COMPARATOR 1: AVERAGE OUTPUT VOLTAGE vs INPUT PHASE DIFFERENCE:

VDEMOUT = VPC1OUT = (VCC/π) (φSIGIN - φCOM- PIN); φDEMOUT = (φSIGIN - φCOMPIN)

SIGIN

COMPIN

VCOOUT

PC1OUT

VCC

VCOIN

GND

FIGURE 3. TYPICAL WAVEFORMS FOR PLL USING PHASE COMPARATOR 1, LOOP LOCKED AT fo

Phase Comparator 2 (PC2)

This is a positive edge-triggered phase and frequency detector. When the PLL is using this comparator, the loop is controlled by positive signal transitions and the duty factors of SIGIN and COMPIN are not important. PC2 comprises two D-type flip-flops, control-gating and a three-state output stage. The circuit functions as an up-down counter (Figure 1) where SIGIN causes an up-count and COMPIN a downcount. The transfer function of PC2, assuming ripple (fr = fi) is suppressed, is:

VDEMOUT = (VCC/4π) (φSIGIN - φCOMPIN) where VDEMOUT is the demodulator output at pin 10; VDEMOUT = VPC2OUT (via low-pass filter).

The average output voltage from PC2, fed to the VCO via the low-pass filter and seen at the demodulator output at pin 10

(VDEMOUT), is the resultant of the phase differences of SIGIN and COMPIN as shown in Figure 4. Typical waveforms

for the PC2 loop locked at fo are shown in Figure 5.

VCC

VDEMOUT (AV)

1/2 VCC

0

-360o

0o

φDEMOUT

360o

FIGURE 4. PHASE COMPARATOR 2: AVERAGE OUTPUT VOLTAGE vs INPUT PHASE DIFFERENCE:

VDEMOUT = VPC2OUT = (VCC/4π) (φSIGIN - φCOM- PIN); φDEMOUT = (φSIGIN - φCOMPIN)

SIGIN

COMPIN

VCOOUT

VCC

PC2OUT

GND

HIGH IMPEDANCE OFF - STATE

VCOIN

PCPOUT

FIGURE 5. TYPICAL WAVEFORMS FOR PLL USING PHASE COMPARATOR 2, LOOP LOCKED AT fo

When the frequencies of SIGIN and COMPIN are equal but the phase of SIGIN leads that of COMPIN, the p-type output driver at PC2OUT is held “ON” for a time corresponding to

the phase difference (φDEMOUT). When the phase of SIGIN lags that of COMPIN, the n-type driver is held “ON”.

When the frequency of SIGIN is higher than that of COMPIN, the p-type output driver is held “ON” for most of the input signal cycle time, and for the remainder of the cycle both n- and p-type drivers are “OFF” (three-state). If the SIGIN frequency is lower than the COMPIN frequency, then it is the n-type driver that is held “ON” for most of the cycle. Subsequently, the voltage at the capacitor (C2) of the low-pass filter connected to PC2OUT varies until the signal and comparator inputs are equal in both phase and frequency. At this stable

4

CD74HC4046A, CD74HCT4046A

point the voltage on C2 remains constant as the PC2 output is in three-state and the VCO input at pin 9 is a high impedance. Also in this condition, the signal at the phase compara-

tor pulse output (PCPOUT) is a HIGH level and so can be used for indicating a locked condition.

Thus, for PC2, no phase difference exists between SIGIN and COMPIN over the full frequency range of the VCO. Moreover, the power dissipation due to the low-pass filter is reduced because both p- and n-type drivers are “OFF” for most of the signal input cycle. It should be noted that the PLL lock range for this type of phase comparator is equal to the capture range and is independent of the low-pass filter. With no signal present at SIGIN, the VCO adjusts, via PC2, to its lowest frequency.

Phase Comparator 3 (PC3)

This is a positive edge-triggered sequential phase detector using an RS-type flip-flop. When the PLL is using this comparator, the loop is controlled by positive signal transitions and the duty factors of SIGIN and COMPIN are not important. The transfer characteristic of PC3, assuming ripple (fr = fi) is suppressed, is:

VDEMOUT = (VCC/2p) (fSIGIN - fCOMPIN) where VDEMOUT is the demodulator output at pin 10; VDEMOUT = VPC3OUT (via low-pass filter).

The average output from PC3, fed to the VCO via the lowpass filter and seen at the demodulator at pin 10 (VDE-

MOUT), is the resultant of the phase differences of SIGIN and COMPIN as shown in Figure 6. Typical waveforms for

the PC3 loop locked at fo are shown in Figure 7.

The phase-to-output response characteristic of PC3 (Figure 6) differs from that of PC2 in that the phase angle between SIGIN and COMPIN varies between 0o and 360o and is 180o at the center frequency. Also PC3 gives a greater voltage swing than PC2 for input phase differences but as a consequence the ripple content of the VCO input signal is higher. With no signal present at SIGIN, the VCO adjusts, via PC3, to its highest frequency.

The only difference between the HC and HCT versions is the input level specification of the INH input. This input disables the VCO section. The comparator’s sections are identical, so that there is no difference in the SIGIN (pin 14) or COMPIN (pin 3) inputs between the HC and the HCT versions.

VCC

VDEMOUT (AV)

1/2 VCC

0

0o

180o

φDEMOUT

360o

FIGURE 6. PHASE COMPARATOR 3: AVERAGE OUTPUT VOLTAGE vs INPUT PHASE DIFFERENCE:

VDEMOUT = VPC3OUT = (VCC/2π) (φSIGIN - φCOM- PIN); φDEMOUT = (φSIGIN - φCOMPIN)

SIGIN

COMPIN

VCOOUT

PC3OUT

VCC

VCOIN

GND

FIGURE 7. TYPICAL WAVEFORMS FOR PLL USING PHASE COMPARATOR 3, LOOP LOCKED AT fo

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CD74HC4046A, CD74HCT4046A

Absolute Maximum Ratings

DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . .	-0.5V to 7V
DC Input Diode Current, IIK	±20mA
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . .
DC Output Diode Current, IOK	±20mA
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . .
DC Drain Current, per Output, IO	±25mA
For -0.5V < VO < VCC + 0.5V. . . . . . . . . . . . . . . . . . . . . .
DC Output Source or Sink Current per Output Pin, IO	±25mA
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . .
DC VCC or Ground Current, ICC . . . . . . . . . . . . . . . . . . . . .	. . . .±50mA

Thermal Information
Thermal Resistance (Typical, Note 3)	θJA (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 90
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 115
Maximum Junction Temperature . . . . . . . . . . . . . . . .	. . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . .	-65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . .	. . . . . . . 300oC
(SOIC - Lead Tips Only)

Operating Conditions

Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC Supply Voltage Range, VCC

HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V HCT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V

DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC Input Rise and Fall Time

2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max) 4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max)

6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

3. θJA is measured with the component mounted on an evaluation PC board in free air.

DC Electrical Specifications

		TEST				25oC		-40oC TO 85oC		-55oC TO 125oC
		CONDITIONS		VCC
PARAMETER	SYMBOL	VI (V)	IO (mA)	(V)	MIN	TYP	MAX	MIN	MAX	MIN	MAX	UNITS
HC TYPES
VCO SECTION
INH High Level Input	VIH	-	-	3	2.1	-	-	2.1	-	2.1	-	V
Voltage
				4.5	3.15	-	-	3.15	-	3.15	-	V
				6	4.2	-	-	4.2	-	4.2	-	V
INH Low Level Input	VIL	-	-	3	-	-	0.9	-	0.9	-	0.9	V
Voltage
				4.5	-	-	1.35	-	1.35	-	1.35	V
				6	-	-	1.8	-	1.8	-	1.8	V
VCOOUT High Level	VOH	VIH or VIL	-0.02	3	2.9	-	-	2.9	-	2.9	-	V
Output Voltage
			-0.02	4.5	4.4	-	-	4.4	-	4.4	-	V
CMOS Loads
			-0.02	6	5.9	-	-	5.9	-	5.9	-	V
VCOOUT High Level			-	-	-	-	-	-	-	-	-	V
Output Voltage
			-4	4.5	3.98	-	-	3.84	-	3.7	-	V
TTL Loads
			-5.2	6	5.48	-	-	5.34	-	5.2	-	V
VCOOUT Low Level	VOL	VIH or VIL	0.02	2	-	-	0.1	-	0.1	-	0.1	V
Output Voltage
			0.02	4.5	-	-	0.1	-	0.1	-	0.1	V
CMOS Loads
			0.02	6	-	-	0.1	-	0.1	-	0.1	V
VCOOUT Low Level			-	-	-	-	-	-	-	-	-	V
Output Voltage
			4	4.5	-	-	0.26	-	0.33	-	0.4	V
TTL Loads
			5.2	6	-	-	0.26	-	0.33	-	0.4	V
C1A, C1B Low Level	VOL	VIL or VIH	4	4.5	-	-	0.40	-	0.47	-	0.54	V
Output Voltage
			5.2	6	-	-	0.40	-	0.47	-	0.54	V
(Test Purposes Only)

6

CD74HC4046A, CD74HCT4046A

	DC Electrical Specifications			(Continued)
				TEST				25oC		-40oC TO 85oC		-55oC TO 125oC
				CONDITIONS		VCC
	PARAMETER	SYMBOL		VI (V)	IO (mA)	(V)	MIN	TYP	MAX	MIN	MAX	MIN	MAX	UNITS
	INH VCOIN Input	II		VCC or	-	6	-	-	±0.1	-	±1	-	±1	μA
	Leakage Current			GND
	R1 Range (Note 4)	-		-	-	4.5	3	-	300	-	-	-	-	kΩ
	R2 Range (Note 4)	-		-	-	4.5	3	-	300	-	-	-	-	kΩ
	C1 Capacitance	-		-	-	3	-	-	No	-	-	-	-	pF
	Range								Limit
						4.5	-	-		-	-	-	-	pF
						6	-	-		-	-	-	-	pF
	VCOIN Operating	-		Over the range		3	1.1	-	1.9	-	-	-	-	V
	Voltage Range			specified for R1 for
						4.5	1.1	-	3.2	-	-	-	-	V
				Linearity See Figure
						6	1.1	-	4.6	-	-	-	-	V
				10, and 35 - 38
				(Note 5)
	PHASE COMPARATOR SECTION
	SIGIN, COMPIN	VIH		-	-	2	1.5	-	-	1.5	-	1.5	-	V
	DC Coupled					4.5	3.15	-	-	3.15	-	3.15	-	V
	High-Level Input
						6	4.2	-	-	4.2	-	4.2	-	V
	Voltage
	SIGIN, COMPIN	VIL		-	-	2	-	-	0.5	-	0.5	-	0.5	V
	DC Coupled
						4.5	-	-	1.35	-	1.35	-	1.35	V
	Low-Level Input
						6	-	-	1.8	-	1.8	-	1.8	V
	Voltage
	PCPOUT, PCn OUT	VOH		VIL or VIH	-0.02	2	1.9	-	-	1.9	-	1.9	-	V
	High-Level Output
						4.5	4.4	-	-	4.4	-	4.4	-	V
	Voltage
						6	5.9	-	-	5.9	-	5.9	-	V
	CMOS Loads
	PCPOUT, PCn OUT	VOH		VIL or VIH	-4	4.5	3.98	-	-	3.84	-	3.7	-	V
	High-Level Output				-5.2	6	5.48	-	-	5.34	-	5.2	-	V
	Voltage
	TTL Loads
	PCPOUT, PCn OUT	VOL		VIL or VIH	0.02	2	-	-	0.1	-	0.1	-	0.1	V
	Low-Level Output
						4.5	-	-	0.1	-	0.1	-	0.1	V
	Voltage
						6	-	-	0.1	-	0.1	-	0.1	V
	CMOS Loads
	PCPOUT, PCn OUT	VOL		VIL or VIH	4	4.5	-	-	0.26	-	0.33	-	0.4	V
	Low-Level Output
					5.2	6	-	-	0.26	-	0.33	-	0.4	V
	Voltage
	TTL Loads
	SIGIN, COMPIN Input	II		VCC or	-	2	-	-	±3	-	±4	-	±5	μA
	Leakage Current			GND		3	-	-	±7	-	±9	-	±11	μA
						4.5	-	-	±18	-	±23	-	±29	μA
						6	-	-	±30	-	±38	-	±45	μA
	PC2OUT Three-State	IOZ		VIL or VIH	-	6	-	-	±0.5	-	±5	-	±10	μA
	Off-State Current
	SIGIN, COMPIN Input	RI		VI at Self-Bias		3	-	800	-	-	-	-	-	kΩ
	Resistance			Operation Point:
						4.5	-	250	-	-	-	-	-	kΩ
				VI, 0.5V,
						6	-	150	-	-	-	-	-	kΩ
				See Figure 10
	DEMODULATOR SECTION
	Resistor Range	RS		at RS > 300kΩ		3	50	-	300	-	-	-	-	kΩ
				Leakage Current		4.5	50	-	300	-	-	-	-	kΩ
				Can Influence
						6	50	-	300	-	-	-	-	kΩ
				VDEMOUT

7