SY89872U_0708 datasheet(2/10 Pages) MICREL

2 / 10 page

Precision Edge®

SY89872U

Micrel, Inc.

M9999-082407

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

Pin Number

Pin Name

Pin Function

1, 2, 3, 4

QB0, /QB0

Differential LVDS Compatible Outputs: Divide by 2, 4, 8, 16.

QB1, /QB1

Unused outputs must be terminated with 100ý across the pin (Q, /Q).

5, 6

QA, /QA

Differential LVDS Compatible Undivided Output Clock.

7, 14

VCC

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

/RESET, /DISABLE

Output Reset and Output Enable/Disable: Internal 25ký pull-up. Input threshold is V

CC/2.

Logic LOW will reset the divider select, and align Bank A and Bank B edges. In addition, when

LOW, Bank A and Bank B will be disabled.

12, 9

IN, /IN

Differential Reference Input Clock: Internal 50ý termination resistors to V

T input.

See “Input Interface Applications” section.

VREF-AC

Reference Voltage: Equal to V

CC–1.4V (approx.), and used for AC-coupled applications.

Maximum sink/source current is 0.5mA. See “Input Interface Applications” section.

Termination Center-Tap: For DC-coupled CML and LVDS inputs, leave this pin floating. See

“Input Interface Applications” section.

GND

Ground.

15, 16

S1, S0

Select Pins: LVTTL/CMOS logic levels. Internal 25ký pull-up resistor. Logic HIGH if left

unconnected (divided by 16 mode). S0 = LSB. Input threshold is V

CC/2.

PIN DESCRIPTION

/RESET

/DISABLE

Bank A Output

Bank B Outputs

Input Clock

Input Clock ÷2

Input Clock

Input Clock ÷4

Input Clock

Input Clock ÷8

Input Clock

Input Clock ÷16

QA = Low, /QA = High(1)

QB0 = Low, /QB0 = High(2)

QB1 = Low, /QB1 = High(2)

TRUTH TABLE

Note 1. On the next negative transition of the input signal.

Note 2. Asynchronous reset/disable function. (See “Timing Diagram”)

PACKAGE/ORDERING INFORMATION

QB0

/QB0

QB1

/QB1

VREF-AC

/IN

16-Pin MLF® (MLF-16)

Ordering Information(1)

Package

Operating

Package

Lead

Part Number

Type

Range

Marking

Finish

SY89872UMI

MLF-16

Industrial

872U

Sn-Pb

SY89872UMITR(2)

MLF-16

Industrial

872U

Sn-Pb

SY89872UMG(3)

MLF-16

Industrial

872U with

NiPdAu

Pb-Free bar line indicator

Pb-Free

SY89872UMGTR(2, 3)

MLF-16

Industrial

872U with

NiPdAu

Pb-Free bar line indicator

Pb-Free

Notes:

1. Contact factory for die availability. Dice are guaranteed at T

A = 25°C, DC Electricals only.

2. Tape and Reel.

3. Pb-Free package is recommended for new designs.

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