SY100EL14VZY - Micrel Semiconductor, Inc.

The SY100EL14V is a low skew 1:5 clock distribution

chip designed explicitly for low skew clock distribution

applications. The device can be driven by either a

differential or single-ended ECL or, if positive power

supplies are used, PECL input signal. The EL14V is

suitable for operation in systems operating from 3.3V to

5.0V supplies. If a single-ended input is to be used the

VBB output should be connected to the CLK input and

bypassed to ground via a 0.01µF capacitor. The VBB

output is designed to act as the switching reference for

the input of the EL14V under single-ended input

conditions, as a result this pin can only source/sink up to

0.5mA of current.

The EL14V features a multiplexed clock input to allow

for the distribution of a lower speed scan or test clock

along with the high speed system clock. When LOW (or

left open and pulled LOW by the input pull-down resistor)

the SEL pin will select the differential clock input.

The common enable (EN) is synchronous so that the

outputs will only be enabled/disabled when they are

already in the LOW state. This avoids any chance of

generating a runt clock pulse when the device is enabled/

disabled as can happen with an asynchronous control.

The internal flip flop is clocked on the falling edge of the

input clock, therefore all associated specification limits

are referenced to the negative edge of the clock input.

When both differential inputs are left open, CLK input

will pull down to VEE and CLK input will bias around

VCC/2.

Pin Function

CLK Differential Clock Inputs

SCLK Scan Clock Input

EN Synchronous Enable

SEL Clock Select Input

VBB Reference Output

Q0-4 Differential Clock Outputs

TRUTH TABLEPIN NAMES

FEATURES

DESCRIPTION

PIN CONFIGURATION/BLOCK DIAGRAM

Precision Edge™

SY100EL14V

CLK SCLK SEL EN Q

L XLLL

HXLLH

XLHLL

XHHLH

XXXHL*

* On next negative transition of CLK or SCLK

Q0 Q0 Q1 Q1 Q2 Q2 Q3 Q3 Q4 Q4

EN VCC NC SCLK CLK CLK V

SEL V

10D

SOIC

TOP VIEW

■3.3V and 5V power supply options

■Typical 30ps output-to-output skew

■Max. 50ps output-to-output skew

■Synchronous enable/disable

■Multiplexed clock input

■75KΩ internal input pull-down resistors

■Available in 20-pin SOIC package

5V/3.3V 1:5 CLOCK

DISTRIBUTION

1Rev.: C Amendment: /0

Issue Date: September 2004

Precision Edge is a trademark of Micrel, Inc.

Precision Edge™

SY100EL14V

Micrel

M9999-090704

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

Symbol Rating Value Unit

VEE Power Supply (VCC = 0V) –8.0 to 0 VDC

VIN(3) Input Voltage (VCC = 0V) 0 to -6.0 VDC

IOUT Output Current

–Continuous 50 mA

–Surge 100

TAOperating Temperature Range –40 to +85 °C

VEE Operating Range(1),(2) –5.7 to -3.0 V

Notes:

1. Absolute maximum rating, beyond which, device life may be impaired, unless otherwise specified on an individual data sheet.

2. Parametric values specified at: 100EL14V Series: –3.0V to –5.5V.

3. In PECL mode operation, VIN (max) = VCC.

ABSOLUTE MAXIMUM RATINGS(1)

TA = –40°CTA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit

VOH Output HIGH Voltage(2)

-1085 -1005 -880 -1025 -955 -880 -1025 -955 -880 -1025 -955 -880

VOL Output LOW Voltage(2)

-1830 -1695 -1555 -1810 -1705 -1620 -1810 -1705 -1620 -1810 -1705 -1620

VOHA Output HIGH Voltage(2)

-1095 — — -1035 — — -1035 — — -1035 — —

VOLA Output LOW Voltage(2)

— — -1555 — — -1610 — — -1610 — — -1610

VIH Input HIGH Voltage

-1165 — -880 -1165 — -880 -1165 — -880 -1165 — -880

VIL Input LOW Voltage

-1810 — -1475 -1810 — -1475 -1810 — -1475 -1810 — -1475

IIL Input LOW Current(3) 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA

CLK -300 — — -300 — — -300 — — -300 — —

IIH Input High Current — — 150 — — 150 — — 150 — — 150 µA

IEE Power Supply Current — 32 40 — 32 40 — 32 40 — 34 42 mA

VBB Output Reference

-1.38 — -1.26 -1.38 — -1.26 -1.38 — -1.26 -1.38 — -1.26

Voltage

DC ELECTRICAL CHARACTERISTICS

VEE = VEE (Min) to VEE (Max); VCC = GND(1)

Notes:

1. This table replaces the three traditionally seen in ECL 100K data books. The same DC parameter values at VEE = -4.5V now apply across the full VEE

range of -3.0V to -5.5V. Outputs are terminated through a 50Ω resistor to -2.0V except where otherwise specified on the individual data sheets.

2. VIN = VIH(Max) or VIL(Min).

3. VIN = VIL(Max).

Precision Edge™

SY100EL14V

Micrel

M9999-090704

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

PRODUCT ORDERING CODE

Ordering Package Operating Marking

Code Type Range Code

SY100EL14VZC Z20-1 Commercial XEL14V

SY100EL14VZCTR(2) Z20-1 Commercial XEL14V

Notes:

1. Recommended for new designs.

2. Tape and Reel.

3. Pb-Free (lead-free).

TA = –40°CTA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit

tPLH Propagation Delay ps

tPHL CLK to Q (Diff) 520 720 550 750 580 680 780 630 830

CLK to Q (SE) 470 770 500 800 530 680 830 580 880

SCLK to Q 470 770 500 800 530 680 830 580 880

tskew Part-to-Part Skew(1) — 200 — 200 — — 200 — 200 ps

Within-Device Skew — 50 — 50 — — 50 — 50

tSSetup Time EN 150 — 150 — 150 — — 150 — ps

tHHold Time EN 200 — 200 — 200 — — 200 — ps

VPP Minimum Input CLK 150 — 150 — 150 — — 150 — mV

Swing

VCMR Common Mode Range(2) mV

VPP < 500mV -2.0 -0.4 -2.1 -0.4 -2.1 — -0.4 -2.1 -0.4

VPP ≥500mV -1.8 -0.4 -1.9 -0.4 -1.9 — -0.4 -1.9 -0.4

trOutput Rise/Fall Times 230 500 230 500 230 360 500 230 500 ps

tfQ (20% – 80%)

AC ELECTRICAL CHARACTERISTICS

VEE = VEE (Min) to VEE (Max); VCC = GND

Notes:

1. Skews are specified for identical LOW-to-HIGH or HIGH-to-LOW transitions.

2. The VCMR 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 VPP(Min) and 1V. The lower end of the VCMR range varies 1:1 with VEE. The numbers in the specification

table assume a nominal VEE = -3.3V. For PECL operation, the VCMR(Min) will be fixed at 3.3V – |VCMR(Min)|.

Ordering Package Operating Marking

Code Type Range Code

SY100EL14VZI(1) Z20-1 Industrial XEL14V

SY100EL14VZITR(1,2) Z20-1 Industrial XEL14V

SY100EL14VZY(3) Z20-1 Industrial XEL14V

SY100EL14VZYTR

(1,2,3)

Z20-1 Industrial XEL14V

Precision Edge™

SY100EL14V

Micrel

M9999-090704

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

20 LEAD SOIC .300" WIDE (Z20-1)

Rev. 03

MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com

The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

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