Document
A product Line of Diodes Incorporated
PI6C5912012
12 Output LVPECL Fanout Buffer
Features
ÎÎ12 Differential LVPECL outputs ÎÎ2 Selectable reference inputs support either
single-ended or differential ÎÎUp to 2GHz output frequency ÎÎUltra low additive phase jitter: < 0.01 ps (typ) (differential
156.25MHz, 12KHz to 20MHz integration range) ÎÎLow skew between outputs ÎÎLow delay from input to output ÎÎSeparate Input and output supply voltage for level shifting ÎÎ2.5V / 3.3V power supply ÎÎIndustrial temperature support ÎÎTQFN-40 package
Description
The PI6C5912012 is a high performance LVPECL fanout buffer device which supports up to 2GHz frequency. This device is ideal for systems that need to distribute low jitter LVPECL clock signals to multiple destinations.
Applications
ÎÎNetworking systems including switches and routers ÎÎHigh frequency backplane based computing and telecom
platforms
Block Diagram
Pin Configuration (40-Pin TQFN)
VDDO Q11Q11+ Q10Q10+ Q9Q9+ Q8Q8+ VDDO
REF_IN0+ REF_IN0REF_IN1+ REF_IN1-
IN_SEL VREF_AC
VDD GND
VDDO
Q[0:11]+ Q[0:11]12
IN_SEL REF_IN1+ REF_IN1-
NC VDD VDD VREF_AC REF_IN0REF_IN0+
NC
40 39 38 37 36 35 34 33 32 31 1 30
2 29
3 28
4 27
5 26
6 25
7 24
8 9 Thermal Pad
23 22
10 21 11 12 13 14 15 16 17 18 19 20
GND Q7Q7+ Q6Q6+ Q5Q5+ Q4Q4+ GND
VDDO Q0+ Q0Q1+ Q1Q2+ Q2Q3+ Q3-
VDDO
PI6C5912012
Document Number DS40091 Rev 2-2
1 www.diodes.com
June 2018 Diodes Incorporated
Pin Description
Pin #
Pin Name
1 IN_SEL
2,3
REF_IN1+ REF_IN1-
4, 10 NC
5, 6 7 8, 9 11, 20, 31, 40 12, 13
14, 15
16, 17
18, 19 21, 30 22, 23
24, 25
26, 27
28, 29
32, 33
34, 35
36, 37
VDD VREF_AC REF_IN0REF_IN0+ VDDO Q0+ Q0Q1+ Q1Q2+ Q2Q3+ Q3GND Q4+ Q4Q5+ Q5Q6+ Q6Q7+ Q7Q8+ Q8-
Q9+
Q9Q10+ Q10-
A product Line of Diodes Incorporated
PI6C5912012
Type
Description
Input
Pulldown
Input clock select. See Table 1 for function. LVCMOS/LVTTL interface levels.
Input
Reference input 1. Accepts Differential or Single Ended inputs
- No Connect
Power Output
Input
Power
Core power supply Bias voltage output. Reference input 0. Accepts Differential or Single Ended inputs Output power supply
Output
LVPECL output pair 0.
Output
LVPECL output pair 1.
Output
LVPECL output pair 2.
Output Power Output
LVPECL output pair 3. Power supply ground LVPECL output pair 4.
Output
LVPECL output pair 5.
Output
LVPECL output pair 6.
Output
LVPECL output pair 7.
Output
LVPECL output pair 8.
Output
LVPECL output pair 9.
Output
LVPECL output pair 10.
PI6C5912012
Document Number DS40091 Rev 2-2
2 www.diodes.com
June 2018 Diodes Incorporated
A product Line of Diodes Incorporated
Pin Description Cont.
Pin # 38, 39 Thermal pad
Pin Name
Q11+ Q11-
Type Output -
Description LVPECL output pair 11. Thermal pad. Connect to ground.
Function Table
Table 1: Input select function
IN_SEL
0 (default) 1
Function
REF_IN0 is the selected reference input REF_IN1 is the selected reference input
PI6C5912012
Symbol
CIN RPULLDOWN RPULLUP
Parameter Input Capcitance Input Pulldown Resistor Input Pullup Resistor
Test Condition
Min. Typ. Max. Units 2 pF 200 kΩ 200 kΩ
PI6C5912012
Document Number DS40091 Rev 2-2
3 www.diodes.com
June 2018 Diodes Incorporated
A product Line of Diodes Incorporated
PI6C5912012
Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested)
Storage temperature....................................................-55 to +150ºC
Supply Voltage to Ground Potential (VDD, VDDO).... -0.5 to +4.6V Inputs (Referenced to GND).............................. -0.5 to VDD+0.5V Clock Output (Referenced to GND)................. -0.5 to VDD+0.5V Latch up...................................................................................200mA
ESD Protection (Input)................................... 2000 V min (HBM)
ESD Protection (Input)................................... 1000 V min (CDM)
Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Power Supply Characteristics and Operating Conditions
Symbol VDD
Parameter Core Supply Voltage
Test Condition
VDDO
IEE IDD TA
Output Supply Voltage
Supply Internal Current Core Power Supply Current Ambient Operating Temperature
Min. 3.135 2.375 3.135 2.375
-40
Typ. 3.3 2.5 3.3 2.5 89
69
Max. 3.465 2.625 3.465 2.625 105
80 85
Units V V V V
mA
°C
DC Electrical Specifications - Differential Inputs
Symbol IIH IIL VIH VIL
VID
VCM ISOMUX
Parameter
Input High current Input Low current Input high voltage Input low voltage Input Differential Amplitude PK-PK Common model input voltage MUX isolation
Test Condition
Input = VDD Input = GND
Min.
Typ.
-85
-0.3 0.1 G.