NC7SZ125P5X**CN-SCI - FAIRCHILD SEMICONDUCTOR

SY897132L

1.5Gbps Link Replicator for Fibre Channel,

Gigabit Ethernet, HDTV and SATA

Precision Edge is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

The SY897132L is a Link Replicator which provides

both serial loop replication as well as serial loopback

control functions. It is high performance and works up

to 1.5Gbps on 3.3V power supplies. The SY897132L is

ideal for Fibre Channel, Gigabit Ethernet, HDTV and

SATA applications. Other applications include

internal/external connection routing in Host Bus

Adaptors as well as hot-pluggable links between switch

cards.

The IN input is sent to both OUT0 and OUT1, which are

enabled when OE0 and OE1 are HIGH and disabled

when they are LOW. When the outputs are disabled,

both differential outputs go HIGH and the buffers are

turned off to save power.

MUX0 controls whether IN or IN1 is sent to OUT0.

Similarly, MUX1 controls whether IN or IN0 is sent to

OUT1. MUX selects whether IN0 or IN1 is sent to OUT.

The SY897132L operates on 3.3V ±5% power supplies

and is guaranteed over the full industrial temperature

range (–40°C to +85°C). The SY897132L is part of

Micrel’s high-speed, Precision Edge® product line.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Functional Block Diagram

Precision Edge®

Features

• Serial loop replication

• No external components required

• T11 Fibre Channel compliant at 1.0625Gbps

• IEEE802.3z Gigabit Ethernet compliant at 1.25Gbps

• SMPTE-292M compliant at 1.485Gbps

• Operates with 3.3V ±5%

• Industrial temperature range: –40°C to +85°C

• Available in 28-pin TSSOP package

Applications

• Link Replicator for: Fibre Channel, Gigabit Ethernet,

HDTV and SATA

• For line cards to provide redundant, hot-swappable

links to redundant switch fabric cards

• For host bus adapter boards for routing between

internal and external connectors

January 2011

M9999-011911-G

hbwhelp@micrel.com or (408) 955-1690

Micrel, Inc. SY897132L

January 2011 2 M9999-011911-G

hbwhelp@micrel.com

Ordering Information(1)

Part Number Package

Type Operating

Range

Package Marking

SY897132LKG K-28 Industrial 7132L with Pb-Free bar-line indicator

SY897132LKGTR(2) K-28 Industrial 7132L with Pb-Free bar-line indicator

SY897132LKY K-28 Industrial 7132L with Pb-Free bar-line indicator

SY897132LKYTR(2) K-28 Industrial 7132L with Pb-Free bar-line indicator

Notes:

1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.

2. Tape and Reel.

Pin Configuration

28-Pin TSSOP (K-28)

or (408) 955-1690

Micrel, Inc. SY897132L

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Pin Description

Pin Number Pin Name Pin Function

5, 6

24, 23

18, 17

IN, /IN

IN0, /IN0

IN1, /IN1

Differential Input Pairs: The inputs are internally biased to 1.2V.

11,12

28,27

21,20

OUT, /OUT

OUT0, /OUT0

OUT1, /OUT1

LVPECL Differential Output Pairs.

OE0

OE1

Output Enable (TTL Inputs): OEx pins enable OUTx pins when HIGH. When OEx is

LOW, OUTx are powered down and both OUT and /OUT go HIGH.

3 MUX

Source Select for OUT (TTL Input): Selects either IN0 (LOW) or IN1 (HIGH);

defaults HIGH when left open.

16 MUX0

Source Select for OUT0 (TTL Input): Selects either IN (LOW) or IN1 (HIGH);

defaults HIGH when left open.

15 MUX1

Source Select for OUT1 (TTL Input): Selects either IN (HIGH) or IN0 (LOW);

defaults HIGH when left open.

9 VCC

Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to

the VCC pin as possible. Supplies input and core circuitry.

10, 13

1, 26

19, 22

VCCP

VCCP0

VCCP1

Positive Output Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as

close to the VCCPx pins as possible. Supplies the respective output buffers.

4, 7, 14, 25 GND,

Exposed pad

Ground: Exposed pad must be connected to a ground plane that is the same

potential as the ground pins.

Input/Output Truth Table

MUX Setting OUT & /OUT OUT0 & /OUT0 OUT1 & /OUT1

Low IN0 & /IN0 - -

MUX High IN1 & /IN1 - -

Low - IN & /IN -

MUX0 High - IN1 & /IN1 -

Low - - IN0 & /IN0

MUX1 High - - IN & /IN

Micrel, Inc. SY897132L

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Absolute Maximum Ratings(1)

Supply Voltage (VCC)................................. 0.5V to +4.0V

Input Voltage (VINPECL)......................–0.5V to VCC + 0.5V

Input Voltage (VINTTL)........................–0.5V to VCC + 0.5V

LVPECL Output Current (IOUT) ............................. -50mA

Lead Temperature (soldering, 20sec.) .................. 260°C

Maximum Case Temperature...............–55°C to +125°C

Storage Temperature (Ts) ....................–65°C to +150°C

Operating Ratings(2)

Supply Voltage (VCC)..........................3.135V to 3.465V

Ambient Temperature (TA) ................... –40°C to +85°C

Package Thermal Resistance(3)

TSSOP

Still-air (θJA)............................................ 76°C/W

Junction-to-Case (θJC) (4) ........................ 25°C/W

DC Electrical Characteristics(5)

VCC = 3.135V to 3.465V; TA = –40°C to +85°C, unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VCC Power Supply Voltage Range 3.135 3.3 3.465 V

ICC Power Supply Current Max. VCC 105 125 mA

VIH Input HIGH Voltage INx, /INx 1.2 VCC V

VIL Input LOW Voltage INx, /INx 0 VIH-0.1 V

VIN Input Voltage Swing INx, /INx, see Figure 2a 0.15 1.3 V

VDIFF_IN Differential Input Voltage Swing

(|IN - /IN|)

AC-coupled, Internally Biased to 1.2V 0.3 2.6 V

PD Power Dissipation Outputs Open, Max VCC 450 mW

LVPECL Outputs DC Electrical Characteristics (5)

VCC = 3.135V to 3.465V; TA = –40°C to +85°C, RL = 50Ω to Vcc-2.0V unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VOH Output HIGH Voltage VCC-1V V

VOL Output LOW Voltage VCC-1.8V V

VDIFF_OUT_50 Differential Output Voltage Swing 1000 2200 mV

VDIFF_OUT_75 Differential Output Voltage Swing RL = 75Ω to Vcc-2.0V 1200 2200 mV

LVTTL/CMOS DC Electrical Characteristics(5)

VCC = 3.135V to 3.465V; TA = –40°C to +85°C, unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

VIH Input HIGH Voltage 2.0 VCC+0.5 V

VIL Input LOW Voltage 0 0.8 V

IIH Input HIGH Current 100 µA

IIL Input LOW Current -100 µA

Notes:

1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not

implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratings conditions

for extended periods may affect device reliability.

2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.

3. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB. ψJB and θJA

values are determined for a four-layer board in still-air number, unless otherwise stated. The circuit is designed to meet the DC specifications

shown in the above table after thermal equilibrium has been established.

4. JEDEC standard multilayer board -2S2P (2 signal, 2 power)

5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.

Micrel, Inc. SY897132L

January 2011 5 M9999-011911-G

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AC Electrical Characteristics

VCC = 3.135V to 3.465V; TA = –40°C to +85°C, unless otherwise stated.

Symbol Parameter Condition Min Typ Max Units

fMAX Maximum Frequency NRZ Data 1.5 Gbps

tPD Propagation Delay Figure 1a 0.4 4 ns

tJitter Deterministic Jitter Note 8 40 pspp

tR, tF Output Rise/Fall Times

(20% to 80%)

At full output swing. 140 175 ps

Duty Cycle 47 53 %

TENABLE Output Enable Time

(OE LOW to HIGH)

See Figure 1b 8 20 ns

TDISABLE Output Disable Time

(OE HIGH to LOW)

See Figure 1b 3 10 ns

Notes:

6. Output-to-Output skew is the difference in time between both outputs, receiving data from the same input, for the same temperature, voltage and

transition.

7. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and no skew at the edges at the

respective inputs.

8. Deterministic jitter is measured at 1.5Gbps with both K28.5 and 223–1 PRBS pattern.

Micrel, Inc. SY897132L

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Detailed Description

Input Functionality

The inputs are typically AC-coupled and are terminated

internally to 1.2V. SY897132L can accept AC-coupled

and DC-coupled LVPECL, CML.

Outputs Termination

The SY897132L are capable of driving differential

transmission lines with either 50Ω or 75Ω impedance.

The outputs are designed to operate with or without

external termination resistors. However, differential

transmission lines should be terminated at the

destination to avoid reflections and noise. See Figure 3

for more details.

OEx Output Enable

The Output Enable (OEx) pins on the SY897132L

provide an option to turn on/off OUT0 and/or OUT1. If

OEx is LOW, the entire output buffer is turned off and

both differential outputs float HIGH. This would

reduce overall ICC by approximately 26mA for each

disabled output pair.

Power Supply Bypass

The SY897132L uses separate 3.3V power supplies

for its core circuitry and output buffers. By separating

the power supplies, SY897132L minimizes the impact

of noise coupled onto the power supply by the various

switching outputs. Placing a 0.1µF bypass capacitor

on the VCC pins will provide additional noise isolation.

Micrel, Inc. SY897132L

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Timing Diagrams

Figure 1a. Propagation Delay

Figure 1b. Output Enable/Disab le T iming (Measured at 50%)

or (408) 955-1690

Micrel, Inc. SY897132L

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Typical Characteristics

VCC = 3.3V, VIN_DIFF = 1000mV, TA = 25°C, unless otherwise stated.

or (408) 955-1690

Micrel, Inc. SY897132L

January 2011 9 M9999-011911-G

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Single-Ended and Differential Swings

Figure 2a. Single-Ended Swing

Figure 2b. Differential Swing

Input Interface Applications

Figure 3. SY897132L Typical Application Interface Diagram