MOTOROLA MC12053A Technical data

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The MC12053A is a super low power ÷64/65, ÷128/129 dual modulus
prescaler. Motorola’ s advanced Bipolar MOSAIC V technology is utilized to
achieve low power dissipation of 4.3 mW at a minimum supply voltage of

2.7 V.

The Divide Ratio Control input, SW, permits selection of divide ratio as
desired. A HIGH on SW selects
The Modulus Control input, MC, selects the proper divide number after SW
has been biased to select the desired divide ratio.

Stand–by mode is featured to reduce current drain to 50 µA typical at

2.7 V when the stand–by pin, SB, is switched LOW, disabling the prescaler.
On–chip output termination provides 500 µA (typical) output current, which is
sufficient to drive a CMOS synthesizer input high impedance load (8.0 pF
typical).

• 1.1 GHz Toggle Frequency

• Supply Voltage of 2.7 to 5.5 V

• Low Power 1.5 mA Typical at V

• Operating Temperature Range of –40 to 85°C

• On–Chip Output Termination

• The MC12053A Is Pin and Functionally Compatible With the MC12036

• Modulus Control Input Level Is Compatible With Standard CMOS and

TTL

MOSAIC V is a trademark of Motorola

FUNCTIONAL TABLE

SW MC Divide Ratio

H H 64
H L 65

L H 128
L L 129

NOTES: 1.SW: H = VCC – 0.5 to VCC, L = Open. A logic L can also be applied by grounding

this pin, but this is not recommended due to increased power consumption.

2.MC & SB: H = 2.0 V to VCC, L = Gnd to 0.8 V.

MAXIMUM RATINGS

Characteristic Symbol Range Unit

Power Supply Voltage, Pin 2 V
Operating Temperature Range T
Storage Temperature Range T
Modulus Control Input, Pin 6 MC –0.5 to V
Maximum Output Current, Pin 4 I

NOTE: ESD data available upon request.

÷64/65; an OPEN on SW selects ÷128/129.

= 2.7 V

CC

CC

A

stg

O

–0.5 to 7.0 Vdc

–40 to 85 °C

–65 to 150 °C

CC

4.0 mA

Vdc

Order this document by MC12053A/D



MECL PLL COMPONENTS

÷64/65, ÷128/129 LOW POWER

DUAL MODULUS PRESCALER

WITH STAND–BY MODE

SEMICONDUCTOR

TECHNICAL DATA

8

1

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

8

1

SD SUFFIX

PLASTIC PACKAGE

CASE 940
(SSOP–8)

PIN CONNECTIONS

(Top View)

TA =

8

IN

7

SB

6

MC

5

Gnd

Package

SO–8

SSOP–8

ORDERING INFORMATION

Device

MC12053AD
MC12053ASD

1

IN

2

V

CC

3

SW

4

OUT

Operating

Temp Range

–40° to +85°C

 Motorola, Inc. 1997 Rev 4

MC12053A

ELECTRICAL CHARACTERISTICS (VCC = 2.7 to 5.5 V; TA = –40 to 85°C, unless otherwise notex.)

Characteristic Symbol Min Typ Max Unit

Toggle Frequency (Sine Wave Input) f
Supply Current Output (Pin 2) VCC = 2.7 V

VCC = 5.0 V

Stand–By Current VCC = 2.7 V

VCC = 5.0 V
Modulus Control & Stand–By Input HIGH (MC & SB) V
Modulus Control & Stand–By Input LOW (MC & SB) V
Divide Ratio Control Input HIGH (SW) V
Divide Ratio Control Input LOW (SW) V
Output Voltage Swing (Note 1) V
Modulus Setup Time MC to OUT at 1100 MHz t
Input Voltage Sensitivity 250–1 100 MHz

100–250 MHz

NOTE: Assumes 8.0 pF high impedance load.

I

I

V

t

CC

SB

IH1

IL1
IH2
IH2
out

set

in

0.1 1.4 1.1 GHz
–

–
–

–

1.60

1.75
50

100

2.0 – VCC + 0.5 V

Gnd – 0.8 V

VCC – 0.5 V

CC

Open Open Open

0.8 1.1 – V
– 11 16 ns

100
400

–
–

2.5

mA

2.5

250
250

VCC + 0.5 V

1000

mVpp

1000

µA

pp

In
In

MC

SB

Figure 1. Logic Diagram (MC12053A)

QD

A

QBC

QD

QBC

QBD

Q

C

QD

B

QBC

QD

QBC

C

QB

C

M

QBD

QC

SW

Sine Wave Generator

C1

IN

50

Ω

C2

IN

QD

QBD

HGFED

Q

C

S

Figure 3. AC Test Circuit

CC

SWV

SB

OUT

MC

GND

Out

C3

Figure 2. Modulus Setup Time

Prop. Delay

MC Setup

MC Release

Modulus setup time MC to out is the MC
setup or MC release plus the prop delay.

VCC = 2.7 to 5.5 V

C

EXTERNAL COMPONENTS

L

C1 = C2 = 1000 pF

µ

C3 = 0.1

F
CL = 8.0 pF (Including Scope
and jig capacitance)

In

Out

MC

MC Input

2

MOTOROLA RF/IF DEVICE DATA

MC12053A

Figure 4. Input Signal Amplitude versus Input Frequency

+15.0
+10.0

+5.0

0

–5.0
–10.0
–15.0
–20.0
–25.0

AMPLITUDE (dBm)

–30.0
–35.0
–40.0
–45.0
–50.0

0 200 400 600 800 1000 1200 1400 1600 1800

OPERATING

WINDOW

FREQUENCY (MHz)

Divide Ratio = 64; VCC = 2.7 V; TA = 25°C

+1257.40
+707.11
+397.64
+223.61
+125.74
+70.71
+39.76
+22.36
+12.57
+7.07
+3.98
+2.24
+1.26
+0.71

mVrms

Figure 5. Output Amplitude versus Input Frequency

2000
1600
1200
800
400
0

0

200 400 600 800 1000 1200 1400 1600 1800

FREQUENCY (MHz)

mVpp

MOTOROLA RF/IF DEVICE DATA

3