LMX2332LSLB datasheet(3/21 Pages) NSC

3 / 21 page

Pin Descriptions (Continued)

Pin No.

LMX233XLSLB

24-pinCSP

Package

Pin No.

LMX233XLTM

20-pin TSSOP

Package

Name

I/O

Description

Load enable high impedance CMOS input. When LE goes HIGH, data

stored in the shift registers is loaded into one of the 4 appropriate

latches (control bit dependent).

GND

—

Ground for IF analog circuitry.

IN IF

IF prescaler complementary input. A bypass capacitor should be placed

as close as possible to this pin and be connected directly to the ground

plane. Capacitor is optional with some loss of sensitivity.

IN IF

IF prescaler input. Small signal input from the VCO.

GND

—

Ground for IF digital, MICROWIRE, F

oLD, and oscillator circuits.

o IF

IF charge pump output. For connection to a loop filter for driving the

input of an external VCO.

—

Power Supply for IF charge pump. Must be

≥ V

CC.

CC2

—

Power supply voltage input for IF analog, IF digital, MICROWIRE,

oLD, and oscillator circuits. Input may range from 2.7V to 5.5V. VCC2

must equal V

CC1. Bypass capacitors should be placed as close as

possible to this pin and be connected directly to the ground plane.

1, 9, 13, 21

—

No connect.

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