MC12079

2

MOTOROLA RF/IF DEVICE DATA

ELECTRICAL CHARACTERISTICS (VCC = 4.5 to 5.5 V; TA = –40 to 85°C, unless otherwise noted.)

Parameter

Symbol

Min

Typ

Max

Unit

Toggle Frequency (Sine Wave)

ft

0.25

3.4

2.8

GHz

Supply Current Output (Pin 2)

ICC

–

9.0

11.5

mA

Input Voltage Sensitivity

250–500 MHz

500–2800 MHz

Vin

400

100

–

–

1000

1000

mVpp

Divide Ratio Control Input High (SW)

VIH

VCC

VCC

VCC

V

Divide Ratio Control Input Low (SW)

VIL

Open

Open

Open

–

Output Voltage Swing

(CL = 12 pF; RL = 1.2 kΩ; IO = 2.7 mA)1

(CL = 12 pF; RL = 2.2 kΩ; IO = 1.5 mA)2

(CL = 12 pF; RL = 3.9 kΩ; IO = 0.85 mA)3

Vout

1.0

1.6

–

Vpp

NOTES: 1. Divide ratio of

÷64 at 2.8 GHz.

2. Divide ratio of

÷128 at 2.8 GHz.

3. Divide ratio of

÷256 at 2.8 GHz.

DQB

CQ

DQ

CQB

DQB

C

Q

In

In

Out

Figure 1. Logic Diagram (MC12079)

DQ

CQB

DQB

C

Q

DQB

CQ

DQB

CQ

DQB

CQ

SW2

SW1

Figure 2. AC Test Circuit

SINE WAVE GENERATOR

50

Ω

C1

C2

C3

VCC = 4.5 to 5.5 V

CL

RL

VCC

IN

IN

GND

OUT

EXTERNAL COMPONENTS

C1 = C2 = 1000 pF

C3 = 0.1

µF

CL = 12 pF (Including Scope and Jig Capacitance)

RL = 1.2 kΩ (for ÷64 at 2.8 GHz)

SW2

SW1