LMX2433 datasheet(4/53 Pages) TI1

4 / 53 page

LMX2430, LMX2433, LMX2434

SNAS187D – FEBRUARY 2003 – REVISED JANUARY 2016

www.ti.com

Pin Functions (continued)

I/O

DESCRIPTION

NAME

ULGA

TSSOP

Programmable multiplexed output. Functions as a general-purpose CMOS tri-state

output, N and R divider output, RF/ IF PLL push-pull analog lock-detect output, RF/

Ftest/LD

IF PLL open-drain analog lock-detect output, or RF/ IF PLL digital filtered lock-detect

output.

Ground for the IF PLL analog and digital circuits, MICROWIRE, Ftest/LD and

GND

—

oscillator circuits.

MICROWIRE Latch Enable input. High-impedance CMOS input. When LE

transitions HIGH, DATA stored in the shift register is loaded into one of 6 internal

control registers.

Oscillator output/ IF PLL fastlock output. The output configuration is dependent on

the state of the ENosc pin. When ENosc is set LOW, the pin functions as an IF

OSCout/

fastlock output, which connects a resistor in parallel to R2 of the external loop filter.

FLoutIF

This configuration also functions as a general-purpose CMOS tri-state output. When

ENosc is set HIGH, the pin functions as an oscillator output so that an external

crystal can be used.

Reference oscillator input. The input has an approximate Vcc/2 threshold and is

OSCin

driven by an external AC-coupled source.

Power supply bias for the RF PLL analog circuits. Vcc may range from 2.25 V to

Vcc

—

2.75 V. Bypass capacitors must be placed as close as possible to this pin and be

connected directly to the ground plane.

7 Specifications

7.1 Absolute Maximum Ratings

See

(1) (2) (3) (4)

MIN

MAX

UNIT

Power supply voltage

−0.3

3.25

VCC to GND

Voltage on any pin to GND

−0.3

VCC + 0.3

VI must be < +3.25 V

Lead temperature (solder 4 seconds)

260

°C

Tstg

Storage temperature

−65

150

°C

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

This device is a high-performance RF integrated circuit with an ESD rating < 2000 V and is ESD-sensitive. Handling and assembly of

this device must be done at ESD-protected work stations.

(3)

GND = 0 V.

(4)

If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

7.2 Recommended Operating Conditions

MIN

MAX

UNIT

Power supply voltage Vcc to GND

2.25

2.75

Operating temperature, TA

−40

°C

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