ZL30415 データシートの表示（PDF） - Zarlink Semiconductor Inc

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ZL30415

SONET/SDH Clock Multiplier PLL

Zarlink Semiconductor Inc 

ZL30415

Data Sheet

Ball Description Table (continued)

Ball #

F5

F6

F7, G1

G2

G3

G4

G5, G6

G7, G8

H1, H2

H3

H4

H5

H6

H7, H8

Name

C19i

C19o

GND

VDD

REF_SEL

FS3

GND

VDD

NC

VDD

FS1

VDD

GND

Description

C19 Reference Input (CMOS Input). This is a single-ended input reference

source used for synchronization. This input accepts 19.44 MHz.

Clock 19.44 MHz (CMOS Output). This output provides a single-ended CMOS

clock at 19.44 MHz.

Ground. 0 volt

Positive Digital Power Supply. +3.3 V ±10%

Reference Select (CMOS Input). If tied low then the C19i single-ended

reference is used as the input reference source. If tied high then the REFinP/N

differential pair is used as the input reference source.

See E4 ball description.

Ground. 0 volt

Positive Digital Power Supply. +3.3 V ±10%

No internal bonding Connection. Leave unconnected.

Positive Digital Power Supply. +3.3 V ±10%

See E4 ball description.

Positive Digital Power Supply. +3.3 V ±10%

Ground. 0 volt.

2.0 Functional Description

The ZL30415 is an analog phased-locked loop which provides rate conversion and jitter attenuation for

SONET/SDH OC-12/STM-4 and OC-3/STM-1 applications. A functional block diagram of the ZL30415 is shown in

Figure 1 and a brief description is presented in the following sections.

2.1 Reference Selection Multiplexer

The ZL30415 accepts two types of input reference clocks:

- differential: operating at 19.44 MHz or 77.76 MHz, compatible with LVDS/LVPECL/CML threshold levels

- single-ended: operating at 19.44 MHz, compatible with CMOS switching levels.

The REF_SEL input determines whether the single-ended CMOS reference input (REFin) or the differential

reference inputs (REFinP/N) are used as input reference clocks. The REF_FREQ input selects the rate of the

differential input clock to be either 19.44 MHz, or 77.76 MHz. See Table 1 for details.

REF_SEL

0

1

1

REF_FREQ Selected Input Reference

Reference Frequency

x

C19i

19.44 MHz (CMOS)

0

REFin

77.76 MHz (Differential)

1

REFin

19.44 MHz (Differential)

Table 1 - Input Reference Selection

4

Zarlink Semiconductor Inc.

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