84329B DATA SHEET

700MHZ, LOW JITTER, CRYSTAL-TO-3.3V LVPECL

FREQUENCY SYNTHESIZER

3

REVISION B 07/29/14

Pin Descriptions and Characteristics

Table 1. Pin Descriptions

NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.

Table 2. Pin Characteristics

Name

Type

Description

M0, M1, M2,

M3, M4, M5,

M6, M7, M8

Input

Pullup

M divider inputs. Data latched on LOW-to-HIGH transition of nP_LOAD input.

LVCMOS/LVTTL interface levels.

N0, N1

Input

Pullup

Determines N output divider value as defined in Table 3C, Function Table. LVCMOS/LVTTL

interface levels.

VEE

Power

Negative supply pins.

TEST

Output

Test output which is used in the serial mode of operation.

Single-ended LVPECL interface levels.

VCC

Power

Core supply pins.

FOUT,

nFOUT

Output

Differential output pair for the synthesizer. LVPECL interface levels.

OE

Input

Pullup

Output enable. When logic HIGH, the outputs are enabled (default). When logic LOW, the

outputs are disabled and drive differential low: FOUT = LOW, nFOUT = HIGH. LVCMOS /

LVTTL interface levels.

nc

Unused

No connect.

S_CLOCK

Input

Pulldown

Clocks the serial data present at S_DATA input into the shift register on the rising edge of

S_CLOCK. LVCMOS/LVTTL interface levels.

S_DATA

Input

Pulldown

Shift register serial input. Data sampled on the rising edge of S_CLOCK. LVCMOS/LVTTL

interface levels.

S_LOAD

Input

Pulldown

Controls transition of data from shift register into the M divider.

LVCMOS/LVTTL interface levels.

VCCA

Power

Analog supply pin.

XTAL_IN

XTAL_OUT

Input

Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.

nP_LOAD

Input

Pullup

Parallel load input. Determines when data present at M8:M0 is loaded into M divider, and

when data present at N1:N0 sets the N output divider value. LVCMOS/LVTTL interface

levels.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

CIN

Input Capacitance

4

pF

RPULLUP

Input Pullup Resistor

51

k



RPULLDOWN

Input Pulldown Resistor

51

k

