Motorola MC44826D Datasheet

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SEMICONDUCTOR

TECHNICAL DATA

TV AND VCR

I2C PLL TUNING CIRCUIT

WITH 1.3 GHz PRESCALER

AND MIX/OSC DECODER

PIN CONNECTIONS

Order this document by MC44826/D

14

13

12

11

10

9

8

1

2

3

4

5

6

7

V

TUN

Gnd

V

CC1

B

1

B

3

B

5

D SUFFIX

PLASTIC PACKAGE

CASE 751A

(SO–14)

14

1

HF

1

HF

2

PHO

Xtal

DEC

SDA

SCL

CA

(Top View)

1

MOTOROLA ANALOG IC DEVICE DATA

  
  

The MC44826 is a tuning circuit for TV and VCR tuner applications. It
contains, on one chip, all the functions required for PLL control of a VCO. This
integrated circuit also contains a high frequency prescaler and thus can
handle frequencies up to 1.3 GHz. The circuit has a band decoder that
provides the band switching signal for the mixer/oscillator circuit. The decoder
is controlled by the buffer bits or independently by extra bits T6 and T7.

The MC44826 has a programmable 512/1024 reference divider and is
manufactured on a single silicon chip using Motorola’s high density bipolar
process, MOSAIC (Motorola Oxide Self Aligned Implanted Circuits).

• Complete Single Chip System for MPU Control (I

2

C Bus)

• Divide–by–8 Prescaler Accepts Frequencies up to 1.3 GHz

• 15 Bit Programmable Divider

• Reference Divider: Programmable for Division Ratios 512 and 1024

• 3–State Phase/Frequency Comparator

• Operational Amplifier for Direct Tuning Voltage Output (30 V)

• Four Programmable Chip Addresses

• Integrated Band Decoder for the Mixer/Oscillator Circuit

• Band Buffers with Low “On” Voltage (0.4 V Maximum at 15 mA)

• Fully ESD Protected to MIL–STD–883C, Method 3015.7

(2000 V, 1.5 kΩ, 150 pF)

MOSAIC is a trademark of Motorola, Inc.

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

MC44826D TA = –20° to +80°C SO–14

 Motorola, Inc. 1996 Rev 1

MC44826

2

MOTOROLA ANALOG IC DEVICE DATA

Representative Block Diagram

This device contains 3,204 active transistors.

Gnd

Test

Logic

Buffers

Latches

P–On
Reset

I2C Bus

Receiver

Latches

Phase

Comp

Ref

Divider

Osc

Latch Control

Program Divider

15 Bit

Latches B

Latches A

÷

8

Prescaler

Preamp

DTB2

POR

Operational

Amplifier

2.7 V

CL

DTB1

CL

Data

RL

DTF

F

out

TDI

F

out

F

ref

T10, T

11

T9, T12, T

14

T

13

37

67812

RL

55.0 V

F

out

F

ref

2

9
11
10

4

CA

SDA

SCL

HF

1

V

CC1

V

TUNVCC2

Bands Out

PHO

Xtal

B5B3B

1

DTS, EN

512/1024

14

13

Shift Register

15 Bit

DEC

Mixer/Oscillator

Band Decoder

T

7

T

6

T

8

1

3

HF

2

12 pF

3.2/4.0
MHz

MAXIMUM RATINGS (T

A

= 25°C, unless otherwise noted.)

Rating Pin Value Unit

Power Supply Voltage (V

CC1

) 5 6.0 V
Band Buffer “Off” Voltage 6, 7, 8 15 V
Band Buffer “On” Current 6, 7, 8 20 mA
Operational Amplifier Power Supply (V

CC2

) 1 40 V
RF Input Level 10 MHz to 1.3 GHz 3, 4 1.5 Vrms
Storage Temperature – –65 to +150 °C
Operating Temperature Range – –20 to +80 °C
Bus Input Voltage (Positive) 10, 11 7 V
Bus Input Voltage (Negative) 10, 11 –0.5 V

MC44826

3

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS (V

CC1

= 5.0 V , V

CC2

= 33 V, TA = 25°C, unless otherwise noted.)

Characteristic

Pin Min Typ Max Unit

V

CC1

Supply Voltage Range 5 4.5 5.0 5.5 V

V

CC1

Supply Current (V

CC1

= 5.0 V) 5 25 35 50 mA
Band Buffer Leakage Current when “Off” at 12 V 6, 7, 8 – 0.01 1.0 µA
Band Buffer Saturation Voltage when “On” at 15 mA 6, 7, 8 – 0.2 0.4 V
Data/Clock Current at 0 V (Acknowledge “Off”) 10, 11 –10 – 0 µA
Data/Clock Current at 5.0 V (Acknowledge “Off”) 10, 11 0 – 1.0 µA
Data/Clock Input Voltage Low 10, 11 – – 1.5 V
Data/Clock Input Voltage High 10, 11 3.0 – – V
Data Saturation Voltage at 3.0 mA (Acknowledge “On”) 11 – 0.25 0.4 V
Decoder “High” Level Sourcing 100 µA 12 3.4 – V

CC1

V
Decoder “Medium” Level Sourcing 15 µA 12 1.7 – 2.3 V
Decoder “Low” Level Sinking 20 µA 12 0 – 0.8 V
Clock Frequency Range 10 – – 100 kHz
Oscillator Frequency Range 13 3.15 3.2 4.05 MHz

Operational Amplifier Internal Reference Voltage – 2.0 2.75 3.2 V
Operational Amplifier Input Current 14 –15 0 15 nA
DC Open Loop Gain (RL = 22 kΩ) 14, 1 100 250 1000 V/V
Gain Bandwidth Product (CL = 0.5 nF) 14, 1 0.3 – – MHz
V

out

Low (RL = 22 kΩ) 1 – 0.25 0.4 V
Phase Detector Current in High Impedance State 14 –15 0 15 nA
Charge Pump Current of Phase Comparator (T14 = 0) 14 30 40 50 µA
Charge Pump Current of Phase Comparator (T14 = 1) 14 90 125 150 µA
V

CC2

Supply Voltage Range 1 25 33 36 V

PIN FUNCTION DESCRIPTION

Pin Function Description

1 V

TUN/VCC2

Output of the tuning voltage amplifier. Needs an external pull–up resistor to drive the varicaps

2 Gnd Ground

3, 4 HF1/ HF

2

Symmetric HF inputs from local oscillator

5 V

CC1

Supply voltage. Typical 5.0 V

6, 7, 8 B1, B3, B

5

Band buffer outputs

9 CA Chip address selection pin
10 SCL Clock input of the I2C bus
11 SDA Data input
12 DEC Band decoder output for the mixer/oscillator circuit
13 Xtal Crystal input
14 PHO Input of tuning voltage amplifier