Microchip SY89544U Handleiding

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 2019 Microchip Technology Inc.DS20006174A-page 1

SY89544U

Features

•Selects Among Four Differential Inputs

•Guaranteed AC Performance over Temperature

and Voltage:

-DC-to >3.2Gbps Data Rate Throughput

-<510ps In-to-Q t

PD

-<150ps t

r

/t

f

•Ultra Low-Jitter Design:

-<1ps

RMS

Random Jitter

-<10ps

PP

Deterministic Jitter

-<10ps

PP

Total Jitter (Clock)

-<0.7ps

RMS

Crosstalk-Induced Jitter

•Unique Input Isolation Design Minimizes

Crosstalk

•Internal Input Termination

•Unique Input Termination and VT Pin Accepts

DC-Coupled and AC-Coupled Inputs (LVDS,

LVPECL, CML)

•350mV LVDS Output Swing

•CMOS/TTL-Compatible MUX Select

•Power Supply 2.5V ±5%

•–40°C to +85°C Temperature Range

•Available in 32-Lead (5mm x 5mm) QFN

Package

Applications

•SONET/SDH Channel Select

•Fibre Channel Multi-Channel Select

•Gigabit Ethernet Multi-Channel Select

General Description

The SY89544U is a fast, low-jitter, 4:1 differential MUX

with an LVDS-compatible (350mV) output with

guaranteed data rate throughput of 3.2Gbps over

temperature and voltage.

The SY89544U differential inputs include a unique,

3-pin internal termination that allows access to the

termination network through a VT pin. This feature

allows the device to easily interface to different logic

standards, both AC- and DC-coupled without external

resistor-bias and termination networks. The result is a

clean, stub-free, low-jitter interface solution.

The SY89544U operates from a single 2.5V supply and

is guaranteed over the full industrial temperature range

(–40°C to +85°C). For applications that require a 3.3V

supply, consider the SY89545L. For applications that

require two differential outputs, consider the

SY89546U or SY89547L. The SY89544U is part of

Microchip’s Precision Edge

®

product family.

Package Type

United States Patent No. RE44,134

SY89544U

32-Lead 5x5 QFN (M)

24

23

22

21

20

19

18

17

VCC

IN3

VT3

/IN3

VCC

SEL1

GND

VCC

VCC

/IN0

VT0

IN0

VCC

SEL0

GND

VCC

1

2

3

4

5

6

7

8

910111213141516

3231302928272625

VCC

VCC

/IN1

VT1

IN1

IN2

VT2

/IN2

GND

GND

/Q

Q

GND

NC

NC

GND

2.5V, 3.2Gbps, Differential 4:1 LVDS Multiplexer

with Internal Input Termination

Product specificaties