DESCRIPTION

425ps propagation delay

1.6V output swings

Single +5V operation

Internal 75K

input pull-down resistors

Available in 16-pin SOIC package

The SY10EL1189 is a differential receiver, differential

transmitter specifically designed to drive coaxial cables.
It incorporates the output cable driver capability of the
SY10EL89 Coaxial Cable Driver with additional circuitry
to multiplex the output cable drive source between the
cable receiver or the local transmitter inputs. The
multiplexer control circuitry is TTL compatible for ease of
operation.

The SY10EL1189 is useful as a bypass element for

Fibre Channel-Arbitrated Loop (FC-AL) or Serial Storage
Architecture (SSA) applications, to create loop style
interconnects with fault tolerant, active switches at each
device node. This device is particularly useful for back
panel applications where small size is desirable.

The EL89 style drive circuitry produces swings twice

as large as a standard PECL output. When driving a
coaxial cable, proper termination is required at both ends
of the line to minimize reflections. The 1.6V output swings
allow for proper termination at both ends of the cable.
Because of the larger output swings, the QT, QT outputs
are terminated into the thevenin equivalent of 50

-3.0V instead of 50

to V

-2.0V.

FEATURES

FIBRE CHANNEL COAXIAL
CABLE DRIVER AND LOOP
RESILIENCY CIRCUIT

PIN CONFIGURATION

Pin

Function

DR/DR

Differential Input from Receive Cable

QR/QR

Buffered Differential Output from Receive Cable

DT/DT

Differential Input to Transmit Cable

QT/QT

Buffered Differential Output to Transmit Cable

SEL

Multiplexer Control Signal (TTL)

Postive Power Supply

GND

Ground

Reference Voltage Output

PRELIMINARY

SY10EL1189

Rev.: C

Amendment: /2

Issue Date:

January 2000

PIN NAMES

SEL

Function

TRUTH TABLE

LOGIC DIAGRAM

GND

SEL

Top View

SOIC

Local

Receive Data

(ECL Levels)

Local

Transmit Data

(ECL Levels)

SEL (TTL)

From Input Cable
(ECL Levels)

To Output Cable
(Enhanced Swing)

PRELIMINARY

SY10EL1189

Micrel

= �40

�

= 0

�

= +25

�

= +85

�

Symbol

Parameter

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max. Unit

Output LOW Voltage

(2,3)

3.05

3.23

3.35

3.05

3.24

3.37

3.05

3.24

3.37

3.05

3.25

3.41

(QR, QR)

Output HIGH Voltage

(2,3)

3.92

4.05

4.11

3.98

4.09

4.16

4.02

4.11

4.19

4.09

4.16

4.28

(QR, QR)

Output LOW Voltage

(2,4)

1.94

2.22

2.50

1.83

2.12

2.41

1.80

2.10

2.39

1.77

2.06

2.35

(QT, QT)

Output HIGH Voltage

(2,4)

3.71

3.89

4.08

3.79

3.98

4.17

3.83

4.02

4.20

3.90

4.09

4.28

(QT, QT)

Quiescent Supply

Current

(5)

Input LOW Voltage

(2)

3.05

3.50

3.05

3.52

3.05

3.52

3.05

3.56

(DR,DR & DT,DT)

Input HIGH Voltage

(2)

3.77

4.11

3.83

4.16

3.87

4.19

3.94

4.28

(DR,DR & DT,DT)

Input LOW Current

150

�

(DR,DR & DT,DT)

Input HIGH Current

0.5

�

(DR,DR & DT,DT)

Input LOW Voltage SEL

0.8

Input HIGH Voltage SEL

2.0

Input LOW Current SEL

= 500mV

600

�

Input HIGH Current SEL

= 2.7V

�

= V

100

Output Reference

3.57

3.63

3.70

3.62

3.67

3.73

3.65

3.70

3.75

3.69

3.75

3.81

Voltage

(2)

Symbol

Rating

Value

Unit

Power Supply Voltage (Referenced to GND)

0 to +7.0

Input Voltage (Referenced to GND)

0 to V

OUT

Output Current

-- Continuous

-- Surge

100

Operating Temperature Range

�40 to +85

�

store

Storage Temperature Range

�50 to +150

�

Operating Voltage Range

(2)

4.5 to 5.5

ABSOLUTE MAXIMUM RATINGS

(1)

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 RATlNG conditions for extended
periods may affect device reliability.

2. Parametric values specified at 4.75 to 5.25V.

DC ELECTRICAL CHARACTERISTICS

(1)

= 5.0V, GND = 0V

NOTES:

1. 10EL circuits are designed to meet the DC specifications shown in the

table after thermal equilibrium has been established. The circuit is
mounted in a test socket or mounted on a printed circuit board and
transverse air greater than 500lfm is maintained.

2. Values will track 1:1 with the V

supply.

3. Outputs loaded with 50

to +3.0V.

4. Outputs loaded with 50

to +2.0V.

5. Outputs open circuited.

PRELIMINARY

SY10EL1189

Micrel

=�40

�

= 0

�

C to 85�C

Symbol

Parameter

Min.

Typ.

Max.

Min.

Typ.

Max.

Unit

Condition

PLH

Propagation Delay

QR (Diff)

175

300

450

225

325

500

Note 2

PHL

to Output

(SE)

150

300

500

175

325

550

Note 3

QT (Diff)

250

425

650

300

450

650

(SE)

225

425

700

250

450

700

QT (Diff)

225

400

650

275

425

650

(SE)

200

400

725

225

425

725

PLH

Propagation Delay

SEL

QT, QT

450

600

850

500

650

800

1.5V to 50% Pt

PHL

Rise/Fall Time

QR, QR

100

275

400

125

275

400

(20% to 80%)

Rise/Fall Time

QT, QT

150

300

550

150

300

550

(20% to 80%)

skew

Within Device Skew

(4)

Minimum Input Swing

(5)

200

CMR

Common Mode Range

(6)

3.00

4.35

3.00

4.35

AC ELECTRICAL CHARACTERISTICS

(1)

= 4.75 to 5.25V

NOTES:

1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is mounted in a

test socket or mounted on a printed circuit board and transverse air greater than 500lfm is maintained.

2. The differential propagation delay is defined as the delay from the crossing points of the differential input signals to the crossing point of the differential

output signals.

3. The single-ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal.

4. Duty cycle skew is the difference between t

PLH

and t

PHL

propagation delay through a device.

5. Minimum input swing for which AC parameters are guaranteed.

6. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified

range and the peak-to-peak voltage lies between V

Min. and 1.0V.

PRODUCT ORDERING CODE

Ordering

Package

Operating

Code

Type

Range

SY10EL1189ZC

Z16-2

Commercial

SY10EL1189ZCTR

Z16-2

Commercial

Part Number SY10EL1189