Micrel, Inc.
SY89833AL
Oct. 1, 2013
2 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Ordering Information(1)
Part Number
Package
Type
Operating Range
Package Marking
SY89833ALMG(2)
QFN-16
Industrial
833A with
Pb-Free bar-line indica tor
SY89833ALMGTR(1 2)
QFN-16
Industrial
833A with
Pb-Free bar-line indica tor
Notes:
1. Tape and Reel.
2. Pb-Free package is recommended for new designs.
Pin Configuration
16-Pin
Truth Table
IN
/IN
EN
Q
/Q
0
1
1
0
1
1
0
1
1
0
X
X
0
0(1)
1(1)
Note:
1. On next negative transition of the input signal (IN).
Micrel, Inc.
SY89833AL
Oct. 1, 2013
3 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Pin Description
Pin Number
Pin Name
Pin Function
15, 16
1, 2
3, 4
5, 6
Q0, /Q0
Q1, /Q1
Q2, /Q2
Q3, /Q3
LVDS Differential Outputs: Normally terminated with 100Ω across the pair (Q,
/Q). See “LVDS Outputs” section, Figure 2a. Unused outputs should be
terminated with a 100Ω resistor across each pair.
8
EN
This single-ended TTL/CMOS-compatible input functions as a synchronous
output enable. The synchronous enable ensures that enable/disable will only
occur when the outputs are in a logic LOW state. Note that this input is internally
connected to a 25kΩ pull
-up resistor and will default to logic HIGH state
(enabled) if left open.
9, 12
/IN, IN
Differential Input: This input pair is the differential signal input to the device.
Input accepts AC- or DC-Coupled differential signals as small as 100mV. Each
pin of the pair internally terminates to a VT pin through 50Ω. Note that this input
will default to an intermediate state if left open. Please refer to the “Input
Interface Applications” section for more details.
10
VREF-AC
Reference Voltage: This output biases to VCC–1.4V. It is used when AC-
Coupling the input (IN, /IN). For AC-Coupled applications, connect VREF-AC to
VT pin and bypass with 0.1μF low ESR capacitor to VCC. See “Input Interface
Applications” section for more details. Maximum sink/source current is ±1.5mA.
Due to the limited drive capability, each VREF-AC pin is only inten ded to driv e its
respective VT pin.
11
VT
Input Termination Center-Tap: Each side of the differential input pair terminates
to the VT pin. The VT pin provides a center
-tap to a termination network for
maximum interf ac e flex ibility. See “Input Interface Applications” section for more
details.
13
GND
Ground. GND pin and exposed pad must be connected to the most negative
potential of the device ground.
7, 14
VCC
Positive Power Supply: Bypass with 0.1μF//0.01μF low ESR capacitors and
place as close to each VCC pin as possible.
Micrel, Inc.
SY89833AL
Oct. 1, 2013
4 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings(1)
Suppl y Voltage (VCC) .................................... –0.5V to +4.0V
Input Voltage (VIN) ................................. –0.5V to VCC +0.3V
LVDS Output Current (IOUT) ....................................... ±10mA
Input Current
Source or Sink Current on (IN, /IN) .................... ±50mA
VT Current
Source or Sink Current on (VT) ............. ……….±100mA
VREF-AC Current
Source or Sink Current on (VREF-AC) ..................... ±2mA
Maximum Operating Junction Temperature ............... 125°C
Lead Temperature (soldering, 20sec.) ....................... 260°C
Storage Temperature (Ts) ......................... –65°C to +150°C
Operating Ratings(2)
Suppl y Voltage (VCC) .................................. +3.0V to +3.60V
Ambient Temperature (TA) .......................... –40°C to +85°C
Junction Thermal Resistance (3)
QFN (TJA)
Still-Air ......................................................... 75°C/W
QFN (\JB) ........................................................... 33°C/W
Electrical Characteristics(4)
TA = –40°C to +85°C, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VCC
Power Supply Voltage Range
3.0
3.3
3.6
V
ICC
Power Supply Current
No load, max. VCC.
75
100
mA
RIN
Input Resistance (IN-to-VT)
45
50
55
Ω
R
DIFF-IN
Differential Input Resistance
(IN-to-/IN)
90
100
110
Ω
V
IH
Input HIGH Voltage
(IN-to-/IN)
1.2
V
CC
V
V
IL
Input LO W Voltage
(IN-to-/IN)
0
V
IH
–0.1
V
V
IN
Input Voltage Swing
(IN-to-/IN)
See Figure 2c.
0.1
1.7
V
VDIFF_IN
Differential Input Voltage
See Figure 2d.
0.2
V
|IIN|
Input Current
(IN, /IN)
Note 5
45
mA
VREF-AC
Reference Voltage
VCC–1.525
VCC–1.425
VCC–1.325
V
Notes:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operat ion is not implied
at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum rating 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. \JB and TJA values
are determined for a 4-layer board in still -air num ber, unless otherwise stated.
4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
5. Due to the internal termination (see "Input Stage" section) the input current depends on the applied voltages at IN, /IN and VT inputs. Do not apply a
combination of voltages that causes the input current to exceed the maximum limit!
Micrel, Inc.
SY89833AL
Oct. 1, 2013
5 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
LVDS Outputs DC Electrical Characteristics(6)
VCC = 3.3V ±10%, RL = 100Ω across the output, TA = –40°C to +85°C, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VOUT
Output Voltage Swing
See Figure 2c.
250
325
mV
VDIFF_OUT
Differential Output Voltage Swing
See Figure 2d.
500
650
mV
VOCM
Output Common Mode Voltage
1.125
1.275
V
'
VOCM
Change in Common Mode Voltage
–50
50
mV
LVTTL/CMOS DC Electrical Characteristics(6)
VCC = 3.3V ±10%, TA = –40°C to +85°C, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VIH
Input HIGH Voltage
2.0
VCC
V
VIL
Input LO W Voltage
0
0.8
V
IIH
Input HIGH Current
–125
30
μA
IIL
Input LO W Current
–300
μA
Notes:
6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
Micrel, Inc.
SY89833AL
Oct. 1, 2013
7 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Typical Characteris tics
VCC = 3.3V, GND = 0V, VIN = 400mV, RL = 100Ω across the outputs, TA = 25ºC, unless otherwise stated.
Micrel, Inc.
SY89833AL
Oct. 1, 2013
8 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Functional Characteristics
VCC = 3.3V, GND = 0V, VIN = 400mV, RL = 100Ω across the outputs, TA = 25ºC, unless otherwise stated.
Micrel, Inc.
SY89833AL
Oct. 1, 2013
9 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Input Stage
Figure 1. Simplified Differential Input Buffer
LVDS Outputs
LVDS specifies a small swing of 325mV typical, on a
nominal 1.2 0V co m mon mode above gro und. The common
mode voltage has tight limits to permit large variations in
ground noise between an LVDS driver and rece iver.
Figure 2a. LVDS Differential Measurement
Figure 2b. LVDS Common Mode Measurement
Figure 2c. Single-Ended Swing
Figure 2d. Differential Swing
Micrel, Inc.
SY89833AL
Oct. 1, 2013
10 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Input Interface Applications
Figure 3a. DC-Coupled
CML Input Interface
Option: May connect VT to VCC
Figure 3b. AC-Coupled
CML Input Interface
Figure 3c. DC-Coupled
LVPECL Input Interface
Figure 3d. AC-Coupled
LVPECL Input Interface
Figure 3e. LVDS Input Interface
Related Product and Suppo rt Documentation
Part Number
Function
Datasheet Link
SY89830U
2.5V/3.3V/5V 2.5GHz 1:4 PECL/ECL
Clock Driver with 2:1 Differential Input MUX
http://www.micrel.com/product-info/products/sy89830u.shtml
SY89831U
Ultra-Precision 1:4 LVPECL Fanout
Buffer/Translator with Internal Termination
http://www.micrel.com/product-info/products/sy89831u.shtml
SY89832U
2.5V Ultra-Precision 1:4 LVDS Fanout
Buffer/Translator with Internal Termination
http://www.micrel.com/product-info/products/sy89832u.shtml
SY89834U
2.5/3.3V Two Input, 1GHz LVTTL/CMOS-to-
LVPECL 1:4 Fanout Buffer/Translator
http://www.micrel.com/product-info/products/sy89834u.shtml
SY89833L
3.3V Ultra-Precision 1:4 LVDS Fanout
Buffer/Translator with Internal Termination
http://www.micrel.com/page.do?page=/product-
info/products/sy89833l.shtml
HBW Solutions
New Products and Termination App. Note
http://www.micrel.com/product-info/as/solutions.shtml
Micrel, Inc.
SY89833AL
Oct. 1, 2013
11 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
Package Information
16-Pin QFN
Micrel, Inc.
SY89833AL
Oct. 1, 2013
12 M9999-0326
09-A
hbwhelp@micrel.com or (408) 955-1690
PCB Thermal Consideration for 16-Pin QFN Package
(Always solder, or equivalent, the exposed pad to the PCB)
Package Notes:
1. Package meets Level 2 moisture sensitivity classification, and are shipped in dry-pack form.
2. Exposed pads must be soldered to a ground for proper thermal management.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet 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.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or syst ems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected t o result in a significant injury to the user.
A
Purchaser’s us e or sale of Micrel Products for use in life support appliances, devic es or sys tems is a Purchaser’s own risk a
nd P
urchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2009 Micrel, Incorporated.