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Micrel, Inc.
2.5V/3V, 3.0GHz CML AnyGate(R)ANY LOGIC WITH 50 or 100 OUTPUTS
SuperLiteTM SY55851 SuperLiteTM SY55851A
SY55851 SY55851A
FEATURES
s Guaranteed AC parameters over temperature: * fMAX > 3.0GHz (SY55851A) * tr / tf < 100ps * Propagation delay < 280ps s Guaranteed operation over -40C to +85C temperature range s Wide supply voltage range: 2.3V to 3.6V s Single IC provides 8 logic functions s 2:1 MUX capability s Fully differential I/O s Source terminated CML outputs for fast edge rates: * SY55851 for 100 load * SY55851A for 50 load s Guaranteed matched propagation delays: * Select (S)-to-out: < 280ps * Input (A and B)-to-out: < 280ps s Accepts PECL, LVPECL, CML input signals s Functions as a PECL/LVPECL-to-CML translator s Available in a 10-pin (3mm x 3mm) MSOP package SuperLiteTM
DESCRIPTION
The SY55851 and SY55851A are highly flexible, universal logic gates capable of up to 3.0GHz operation (SY55851A). These AnyGate(R) differential logic devices will produce all possible logic functions of two Boolean variables. They can be configured as any of the following gates: AND, NAND, OR, NOR, XOR, XNOR, DELAY, NEGATION (NOT). The SY55851 and SY55851A can also function as a 2-input multiplexer. The SY55851 has an output stage optimized for 100 loads, and the SY55851A is optimized for 50 loads. The differential inputs for both devices are normally terminated with a single resistor (100) between the true and complement pins.
APPLICATIONS
s s s s Port bypass Data communication systems Wireless communication systems Telecom systems
FUNCTIONAL BLOCK DIAGRAM
2
S
A B
2
0S 1
2
2
Q
AnyGate is a registered trademarks of Micrel, Inc. SuperLite is trademarks of Micrel, Inc. M9999-110705 hbwhelp@micrel.com or (408) 955-1690
Rev.: D Amendment: /0
1
Issue Date: November 2005
Micrel, Inc.
SuperLiteTM SY55851 SY55851A
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
S1 /S 2 A3 /A 4 GND 5 10 VCC 9 /B 8B 7Q 6 /Q
Part Number SY55851UKI SY55851UKITR(2) SY55851AUKI SY55851AUKITR(2) SY55851UKG(3) SY55851UKGTR(2, 3) SY55851AUKG(3) SY55851AUKGTR(2, 3)
Package Type K10-1 K10-1 K10-1 K10-1 K10-1 K10-1 K10-1 K10-1
Operating Range Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Package Marking 851U 851U 851A 851A 851U with Pb-Free bar-line indicator 851U with Pb-Free bar-line indicator 851A with Pb-Free bar-line indicator 851A with Pb-Free bar-line indicator
Lead Finish Sn-Pb Sn-Pb Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu
10-Pin MSOP (K10-1)
Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number 1, 2 Pin Name S, /S Pin Function CML, PECL, LVPECL Input Selector: This differential CML input is one of the inputs to the logic block. It represents either one Boolean input for a 2-variable logic function, or the select input for a 2-input MUX. CML, PECL, LVPECL Input: This is one of the differential inputs to the logic block. For a 2-variable logic function, it is either a constant value or a Boolean input. For a 2input MUX, this signal represents the output when S is set to logic zero. Ground. Differential CML Output: This is the differential CML output for the logic block. For termination guidelines, see Figure 3. CML, PECL, LVPECL Input: This is one of the differential inputs to the logic block. For a 2-variable logic function, it is either a constant value or a Boolean input. For a 2input MUX, this signal represents the output when S is set to logic one. VCC.
3, 4
A, /A
5 6, 7 8, 9
GND /Q, Q B, /B
10
VCC
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Micrel, Inc.
SuperLiteTM SY55851 SY55851A
FUNCTIONAL DESCRIPTION
Establishing Static Logic Inputs The true pin of an input pair is internally biased to ground through a 75k resistor. The complement pin of an input pair is internally biased to VCC/2 through an internal voltage divider consisting of two 75k resistors. Since some logic functions necessitate an output to be connected to two inputs, SY55851/A inputs have no internal terminations. Typically, one resistor between the true and complement input is all that is required, as per Figure 3. To keep an input at static logic zero at VCC 3.0V, leave both inputs unconnected or tie the complement input to VCC. For VCC < 3.0V applications, connect the complement input to VCC and leave the true input unconnected. To make an input static logic one, connect the true input to VCC, and leave the complement input unconnected. These are the only safe ways to cause inputs to be at a static value. In particular, no input pin should be directly connected to ground. All NC (no connect) pins should be unconnected.
NC
Input /Input
VCC NC
Input
NC
/Input
For VCC 3.0V Applications
Figure 1. Hard Wiring A Logic "1"
Note 1.
(1)
Input is either A, B, S input, and /Input is either /A, /B, /S input.
NC VCC
Input /Input
For VCC < 3.0V Applications
Figure 2. Hard Wiring A Logic "0" (1)
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Micrel, Inc.
SuperLiteTM SY55851 SY55851A
TRUTH TABLES
AND/NAND
A B L H L H S L L H H Q L L L H ( () /Q H H H L
NC
VCC
S A /S /A B /B
Q /Q ( )
L L L L
S A /S /A B /B
OR/NOR
Q + /Q ( + )
A L H L H
B H H H H
S L L H H
+ Q L H H H
( + ) /Q H L L L
VCC
NC
S A /S /A B /B
XOR/XNOR
A B H H L L S L H L H Q L H H L ( ) /Q H L L H
Q /Q ( )
L L H H
NC
VCC
S A /S /A B /B
DELAY/NEGATION
Q /Q
A L H B X X S L L Q L H /Q H L
VCC
S A /S /A B /B
NC Q /Q
A X X B L H S H H Q L H /Q H L
S
2:1 MUX
A B 0
S
Q
Q B A
/Q A B
H L
1
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Micrel, Inc.
SuperLiteTM SY55851 SY55851A
CML TERMINATION AND TTL INTERFACE
All inputs accept the output from any other member of this family. All outputs are source terminated 100 or 50 CML differential drivers as shown in Figure 3. All inputs to the SY55851/A must be externally terminated. SY55851/A inputs are designed to accept a termination resistor between the true and complement inputs of a differential pair. 0402 form factor chip resistors will fit with some trace fanout.
VCC
VCC
50
100 100 Q /Q 100 200 100
50 Q /Q
50 100 50
16mA
8mA
SY55851A
SY55851
Figure 3a. SY55851 (100 Load CML Output)
Figure 3b. Differentially Terminated SY55851A (50 Load CML Output)
VCC
VCC
100
100 Q /Q
100
100
50 100 50 VCC VCC 1k VCC 549 S /S VCC VCC (TTL Driver) SY55851 SY55851A
8mA
TTL Driver
1k
SY55851
1.47k
Figure 3c. Differentially Terminated SY55851 (50 Load CML Output)
Figure 4. Interfacing TTL-to-CML Select Inputs
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Micrel, Inc.
SuperLiteTM SY55851 SY55851A
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC VIN VOUT TA TLEAD Tstore JA JC
Note 1.
Rating Power Supply Voltage Input Voltage CML Output Voltage Operating Temperature Range Lead Temperature (soldering, 20sec.) Storage Temperature Range Package Thermal Resistance (Junction-to-Ambient) Package Thermal Resistance (Junction-to-Case) -Still-Air (multi-layer PCB) -500lfpm (multi-layer PCB)
Value -0.5 to +6.0 -0.5 to VCC +0.5 VCC -1.0 to VCC +0.5 -40 to +85 260 -65 to +150 113 96 42
Unit V V V C C C C/W C/W C/W
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.
DC ELECTRICAL CHARACTERISTICS
TA = -40C to +85C(2)
Symbol VCC ICC Parameter Power Supply Voltage Power Supply Current SY55851 SY55851A Min. 2.3 -- -- Typ. -- -- 46 Max. 3.6 40 60 Unit V mA mA No Load No Load Condition
CML DC ELECTRICAL CHARACTERISTICS
VCC = 2.3V to 3.6V; GND = 0V; TA = -40C to +85C
Symbol VID VIH VIL VOH VOL VOUT Parameter Differential Input Voltage Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Output Voltage Swing(3) SY55851 SY55851A ROUT Output Source Impedance SY55851 SY55851A Min. 100 1.6 1.5 VCC - 0.040 VCC - 1.00 0.650 -- -- -- 80 40 Typ. -- -- -- VCC - 0.010 VCC - 0.800 0.800 0.400 0.200 0.400 100 50 Max. -- VCC VCC - 0.1 VCC VCC - 0.65 1.00 -- -- -- 120 60 Unit mV V V V V V V V V No Load No Load No Load 100 Load(4) 50 Load(5) (SY55851) 50 Load(6) (SY55851A) Condition
Note 2. Note 3. Note 4. Note 5. Note 6.
The DC parameters are guaranteed after thermal equilibrium has been established. Actual voltage levels and differential swing will depend on customer termination scheme. Refer to the "CML Termination" diagram for more details. Applies to SY55851: 200 termination resistor across Q and /Q. See Figure 3a. Applies to the SY55851. See Figure 3c. Applies to the SY55851A: 100 termination resistor across Q and /Q. See Figure 3b.
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Micrel, Inc.
SuperLiteTM SY55851 SY55851A
AC ELECTRICAL CHARACTERISTICS(1, 2)
VCC = 2.3V to 3.6V; GND = 0V; TA = -40C to +85C
Symbol fMAX(3) Parameter Max. Operating Frequency SY55851 SY55851A Propagation Delay SY55851 (S to Q) SY55851A Propagation Delay (A-Q and B-Q) SY55851 SY55851A CML Output Rise/Fall Times (20% to 80%) SY55851 SY55851A Min. 2.5 3.0 -- 130 -- 130 -- -- Typ. -- -- -- -- -- -- -- 65 Max. -- -- 350 280 350 280 110 100 Unit GHz GHz ps ps ps ps ps ps Condition
tPD(S-Q)
tPD (A-Q and B-Q) tr tf
Note 1. Note 2. Note 3.
SY55851: outputs terminated to 50 equivalent load. See Figure 3c. SY55851A: outputs terminated to 50 load. See Figure 3b Specification for packaged product only. fMAX represents a maximum toggle rate in which the output still meets CML logic swing.
M9999-110705 hbwhelp@micrel.com or (408) 955-1690
7
Micrel, Inc.
SuperLiteTM SY55851 SY55851A
10-PIN MSOP (K10-1)
Rev. 00
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
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. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems 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 to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2005 Micrel, Incorporated. M9999-110705 hbwhelp@micrel.com or (408) 955-1690
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