Differential 1:8 Push-Pull Clock ZDB/Fanout Buffer for PCIe, 3.3 V

NB3W800L
3.3 V 100/133 MHz
Differential 1:8 HCSLCompatible Push-Pull Clock
ZDB/Fanout Buffer for PCIe)
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Description
The NB3W800L is a low−power 8−output differential buffer that
meets all the performance requirements of the DB800ZL
specification. The NB3W800L is capable of distributing the reference
clocks for Intel ® QuickPath Interconnect (Intel QPI), PCIe
Gen1/Gen2/Gen3, SAS, SATA, and Intel Scalable Memory Interconnect
(Intel SMI) applications. A fixed, internal feedback path maintains low
drift for critical QPI applications.
MARKING
DIAGRAM
1
NB3W800L
AWLYYWWG
1 48
CASE 485DP
Features
•
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•
•
•
•
•
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8 Differential Clock Output Pairs @ 0.7 V
Low−power NMOS Push−pull HCSL Compatible Outputs
Cycle−to−cycle Jitter <50 ps
Output−to−output Skew <50 ps
Input−to−output Delay Variation <100 ps
PCIe Gen3 Phase Jitter <1.0 ps RMS
QPI 9.6GT/s 12UI Phase Jitter <0.2 ps RMS
Pseudo−External Fixed Feedback for Lowest Input−to−output Delay
Individual OE Control; Hardware Control of Each Output
PLL Configurable for PLL Mode or Bypass Mode (Fanout
Operation)
100 MHz or 133 MHz PLL Mode Operation; Supports PCIe and QPI
Applications
Selectable PLL Bandwidth; Minimizes Jitter Peaking in Downstream
PLL’s
SMBus Programmable Configurations
Spread Spectrum Compatible; Tracks Input Clock Spreading for Low
EMI
These are Pb−Free Devices
© Semiconductor Components Industries, LLC, 2015
August, 2015 − Rev. 1
1
NB3W800L
A
WL
YY
WW
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
Package
Shipping†
NB3W800LMNG
QFN48
(Pb−Free)
490 / Tray
NB3W800LMNTXG
QFN48
(Pb−Free)
2500 / Tape &
Reel
NB3W800LMNTWG
QFN48
(Pb−Free)
2500 / Tape &
Reel
Device
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Publication Order Number:
NB3W800L/D
NB3W800L
8
OE[7:0]#
FB_OUT
FB_OUT#
SSC Compatible
PLL
CLK_IN
DIF[7:0]
MUX
DIF[7:0]#
CLK_IN#
100M_133M#
HBW_BYP_LBW#
Control
Logic
PWRGD/PWRDN#
SDA
SCL
Figure 1. Simplified Block Diagram
Table 1. OE AND POWER PIN TABLE
Inputs
PWRGD/
PWRDN#
OE# Hardware Pins & Control Register Bits
CLK_IN/
CLK_IN#
SMBUS
Enable Bit
OE# Pin
DIF/DIF# [7:0]
0
X
X
X
1
Running
0
X
1
1
Outputs
FB_OUT/
FB_OUT#
PLL State
Hi−Z
Hi−Z
OFF
Hi−Z
Running
ON
0
Running
Running
ON
1
Hi−Z
Running
ON
Table 2. FUNCTIONALITY AT POWER−UP (PLL MODE)
Table 5. PLL OPERATING MODE READBACK TABLE
100M_133M#
CLK_IN MHz
DIF(7:0)
HBW_BYP_LBW#
Byte0, bit 7
Byte 0, bit 6
1
100.00
CLK_IN
Low (Low BW)
0
0
0
133.33
CLK_IN
Mid (Bypass)
0
1
High (High BW)
1
1
Table 3. POWER CONNECTIONS
Table 6. TRI−LEVEL INPUT THRESHOLDS
Pin Number
VDD
GND
Description
44
49
Analog PLL
3
2
Analog Input
10, 15, 19, 27, 34, 38, 42
49
DIF clocks
Level
Voltage
Low
<0.8 V
Mid
1.2<Vin<1.8 V
High
Vin > 2.2 V
Table 7. PLL OPERATING MODE
Table 4. SMBus ADDRESS
HBW_BYP_LBW#
Mode
Address
+ Read/Write bit
Low
PLL Lo BW
D8
R
Mid
Bypass
High
PLL Hi BW
NOTE:
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2
PLL is OFF in Bypass Mode
OE6#
VDD
DIF7
DIF7#
OE7#
VDD
NC
VDDA
NC
NC
100M_133M#
HBW_BYP_LBW#
NB3W800L
48
37
36
1
DIF6#
PWRGD/PWRDN#
GNDA
DIF6
VDDR
VDD
DIF5#
CLK_IN
CLK_IN#
DIF5
Bottom EPAD
must be connected
to Ground
SDA
SCL
OE5#
OE4#
FB_OUT_NC#
DIF4#
FB_OUT_NC
DIF4
VDD
VDD
DIF3#
OE0#
DIF3
NC
12
25
24
OE3#
OE2#
DIF2#
DIF2
NC
VDD
OE1#
DIF1
DIF1#
VDD
DIF0
DIF0#
13
Figure 2. Pin Configuration
Table 8. PIN DESCRIPTIONS
Pin #
Pin Name
Type
Description
1
PWRGD/PWRDN#
IN
3.3 V Input notifies device to sample latched inputs and start up on first high assertion,
or exit Power Down Mode on subsequent assertions. Low enters Power Down Mode.
2
GNDA
GND
Ground for Input Receiver and PLL Core
3
VDDR
PWR
3.3 V power for differential input clock (receiver).
This VDD should be treated as an analog power rail and filtered appropriately.
4
CLK_IN
IN
0.7 V Differential true input
5
CLK_IN#
IN
0.7 V Differential complementary Input
6
SDA
I/O
Data pin of SMBus circuitry
7
SCL
IN
Clock pin of SMBus circuitry
8
FB_OUT_NC#
OUT
Complementary half of differential feedback output provides feedback signal to the PLL for
synchronization with input clock to eliminate phase error. This pin should NOT be connected on
the circuit board; the feedback is internal to the package.
9
FB_OUT_NC
OUT
True half of differential feedback output provides feedback signal to the PLL for synchronization
with the input clock to eliminate phase error. This pin should NOT be connected on the circuit
board; the feedback is internal to the package.
10
VDD
PWR
Power supply, nominal 3.3 V
11
OE0#
IN
Active low input for enabling DIF pair 0. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
12
NC
N/A
No Connection.
13
DIF0
OUT
0.7 V differential true clock output
14
DIF0#
OUT
0.7 V differential complementary clock output
15
VDD
PWR
Power supply, nominal 3.3 V
16
DIF1
OUT
0.7 V differential true clock output
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NB3W800L
Table 8. PIN DESCRIPTIONS
Pin #
Pin Name
Type
Description
17
DIF1#
OUT
0.7 V differential complementary clock output
18
OE1#
IN
Active low input for enabling DIF pair 1. This pin has an internal pull−down.
1 =disable outputs, 0 = enable outputs
19
VDD
PWR
Power supply, nominal 3.3 V
20
NC
N/A
No Connection.
21
DIF2
OUT
0.7 V differential true clock output
22
DIF2#
OUT
0.7 V differential complementary clock output
23
OE2#
IN
Active low input for enabling DIF pair 2. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
24
OE3#
IN
Active low input for enabling DIF pair 3. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
25
DIF3
OUT
0.7 V differential true clock output
26
DIF3#
OUT
0.7 V differential complementary clock output
27
VDD
PWR
Power supply, nominal 3.3 V
28
DIF4
OUT
0.7 V differential true clock output
29
DIF4#
OUT
0.7 V differential complementary clock output
30
OE4#
IN
Active low input for enabling DIF pair 4. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
31
OE5#
IN
Active low input for enabling DIF pair 5. This pin has an internal pull−down.
1 =disable outputs, 0 = enable outputs
32
DIF5
OUT
0.7 V differential true clock output
33
DIF5#
OUT
0.7 V differential complementary clock output
34
VDD
PWR
Power supply, nominal 3.3 V
35
DIF6
OUT
0.7 V differential true clock output
36
DIF6#
OUT
0.7 V differential complementary clock output
37
OE6#
IN
Active low input for enabling DIF pair 6. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
38
VDD
PWR
Power supply, nominal 3.3 V
39
DIF7
OUT
0.7 V differential true clock output
40
DIF7#
OUT
0.7 V differential complementary clock output
41
OE7#
IN
Active low input for enabling DIF pair 7. This pin has an internal pull−down.
1 = disable outputs, 0 = enable outputs
42
VDD
PWR
Power supply, nominal 3.3 V
43
NC
N/A
No Connection.
44
VDDA
PWR
3.3 V power for the PLL core.
45
NC
N/A
No Connection.
46
NC
N/A
No Connection.
47
100M_133M#
IN
3.3 V Input to select operating frequency. See Functionality Table for Definition
48
HBW_BYP_LBW#
IN
Trilevel input to select High BW, Bypass or Low BW mode.
See PLL Operating Mode Table for Details.
49
GND
PWR
EPAD, must be connected to Ground
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NB3W800L
Table 9. ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VDD, VDDA
3.3 V Supply Voltage (Notes 1, 2)
VDD for core logic and PLL
4.6
V
VIL
Input Low Voltage (Note 1)
VIH
Input High Voltage (Note 1)
Except for SMBus interface
VDD + 0.5
V
VIHSMB
Input High Voltage (Note 1)
SMBus clock and data pins
5.5
V
150
°C
125
°C
GND−0.5
Ts
Storage Temperature (Note 1)
Tj
Junction Temperature (Note 1)
ESD prot
Input ESD protection (Note 1)
Human Body Model
qJA
Thermal Resistance, Junction−to−Ambient
Still air
qJC
Thermal Resistance, Junction−to−Case
V
−65
2000
V
17
°C/W
7
°C/W
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Guaranteed by design and characterization, not tested in production.
2. Operation under these conditions is neither implied nor guaranteed.
Table 10. ELECTRICAL CHARACTERISTICS–CLOCK INPUT PARAMETERS (HCSL−COMPATIBLE)
(VDD = VDDA = 3.3 V ±5%, TA = 0°C * 70°C), See Test Loads for Loading Conditions. (Note 5)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIHCLK_IN
Input High Voltage - CLK_IN (Note 3)
Differential inputs
(single−ended measurement)
600
800
1150
mV
VILCLK_IN
Input Low Voltage - CLK_IN (Note 3)
Differential inputs
(single−ended measurement)
VSS - 300
0
300
mV
VCOM
Input Common Mode
Voltage - CLK_IN (Note 3)
Common Mode Input Voltage
(Single−ended measurement)
300
1000
mV
VSWING
Input Amplitude - CLK_IN (Note 3)
Peak to Peak (differential)
300
1450
mV
dv/dt
Input Slew Rate - CLK_IN (Notes 3, 4)
Measured differentially
0.35
8
V/ns
IIN
Input Leakage Current (Note 3)
VIN = VDD , VIN = GND
−5
5
mA
dtin
Input Duty Cycle (Note 3)
Measurement from differential
waveform
45
55
%
JDIFIn
Input Jitter - Cycle to Cycle (Note 3)
Differential Measurement
125
ps
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
3. Guaranteed by design and characterization, not tested in production.
4. Slew rate measured through ±75 mV window centered around differential zero.
5. Test configuration is; Rs = 27 W, 2 pF for 85 W transmission line.
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NB3W800L
Table 11. ELECTRICAL CHARACTERISTICS – Input/Supply/Common Parameters
(VDD = VDDA = 3.3 V ±5%, TA = 0°C * 70°C), See Test Loads for Loading Conditions. (Note 11)
Symbol
Parameter
Conditions
Min
Max
Units
VIH
Input High Voltage (Note 6)
Single−ended inputs, except SMBus,
low threshold and tri−level inputs
2
VDD + 0.3
V
VIL
Input Low Voltage (Note 6)
Single−ended inputs, except SMBus,
low threshold and tri−level inputs
GND − 0.3
0.8
V
IIN
Input Current (Note 6)
Single−ended inputs,
VIN = GND, VIN = VDD
−5
5
mA
Single−ended inputs
VIN = 0 V; Inputs with internal pull−up
resistors VIN = VDD; Inputs with
internal pull−down resistors
−200
200
mA
VDD = 3.3 V, Bypass mode
33
150
MHz
IINP
Fibyp
Input Frequency (Note 7)
Typ
Fipll
VDD = 3.3 V, 100 MHz PLL mode
99
100.00
101
MHz
Fipll
VDD = 3.3 V, 133.33 MHz PLL mode
132.33
133.33
134.33
MHz
7
nH
Lpin
Pin Inductance (Note 6)
CIN
Capacitance (Note 6)
Logic Inputs, except CLK_IN
1.5
4.5
pF
CINCLK_IN
CLK_INdifferential clock inputs (Note 9)
1.5
2.7
pF
COUT
Output pin capacitance
4.5
pF
fMODIN
Input SS Modulation Frequency (Note 6)
Allowable Frequency
(Triangular Modulation)
30
33
kHz
tLATOE#
OE# Latency (Notes 6. 8)
DIF start after OE# assertion
DIF stop after OE# deassertion
4
8
cycles
tDRVPD
Tdrive_PD# (Notes 6, 8)
DIF output enable after
PD# de−assertion
300
ms
tF
Tfall (Notes 6, 7)
Fall time of control inputs
10
ns
tR
Trise (Notes 6, 7)
Rise time of control inputs
10
ns
VILSMB
SMBus Input Low Voltage (Note 6)
0.8
V
VIHSMB
SMBus Input High Voltage (Note 6)
VDDSMB
V
VOLSMB
SMBus Output Low Voltage (Note 6)
@ IPULLUP
IPULLUP
SMBus Sink Current (Note 6)
@ VOL
4
VDDSMB
Nominal Bus Voltage (Note 6)
3 V to 5 V ±10%
2.7
tRSMB
SCL/SDA Rise Time (Note 6)
tFSMB
fMAXSMB
2.1
0.4
V
mA
5.0
V
(Max VIL - 0.15) to (Min VIH + 0.15)
1000
ns
SCL/SDA Fall Time (Note 6)
(Min VIH + 0.15) to (Max VIL - 0.15)
300
ns
SMBus Operating Frequency
(Notes 6, 10)
Maximum SMBus operating frequency
100
kHz
6. Guaranteed by design and characterization, not tested in production.
7. Control input must be monotonic from 20% to 80% of input swing.
8. Time from deassertion until outputs are >200 mV
9. CLK_IN input
10. The differential input clock must be running for the SMBus to be active
11. Test configuration is; Rs = 27 W, 2 pF for 85 W transmission line.
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NB3W800L
Table 12. DIF 0.7 V AC TIMING CHARACTERISTICS (Non−Spread or −0.5% Spread Spectrum Mode)
(VDD = VDDA = 3.3 V ±5%, TA = 0°C * 70°C), See Test Loads for Loading Conditions.
CLK = 100 MHz, 133.33 MHz
Min
Symbol
Parameter
Tstab (Note 32)
Clock Stabilization Time
Laccuracy (Notes 15, 19, 27, 33)
Tabs (Notes 15, 16, 19)
Long Accuracy
Absolute
Min/Max
Host CLK
Period
No Spread
−0.5% Spread
Slew_rate (Notes 13, 15, 19)
DIFF OUT Slew_rate
DTrise / DTfall (Notes 15, 19, 29)
Rise and Fall Time Variation
9.94900 for 100 MHz
Max
Unit
1.8
ms
100
ppm
10.05100 for 100 MHz
ns
7.44925 for 133 MHz
7.55075 for 133 MHz
9.49900 for 100 MHz
10.10126 for 100 MHz
7.44925 for 133 MHz
7.58845 for 133 MHz
1.0
Rise/Fall Matching (Notes 15, 19, 30, 31)
4.0
V/ns
125
ps
20
%
VHigh (Notes 15, 18, 21)
Voltage High (typ 0.70 Volts)
660
850
mV
VLow (Notes 15, 18, 22)
Voltage Low (typ 0.0 Volts)
−150
150
mV
Vmax (Note 18)
Maximum Voltage
1150
mV
Vcross absolute (Notes 12, 14, 15, 18, 25)
Absolute Crossing Point Voltages
250
550
mV
Vcross relative (Notes 15, 17, 18, 25)
Relative Crossing Point Voltages
Calc
Calc
Total D Vcross (Notes 15, 18, 26)
Total Variation of Vcross
Over All Edges
140
mV
Vovs (Notes 15, 18, 23)
Maximum Voltage (Overshoot)
Vhigh + 0.3
V
Vuds (Notes 15, 18, 24)
Maximum Voltage (Undershoot)
Vlow − 0.3
V
12. Measured at crossing point where the instantaneous voltage value of the rising edge of CLK equals the falling edge of CLK#.
13. Measurment taken from differential waveform on a component test board. The slew rate is measured from −150 mV to +150 mV on the
differential waveform. Scope is set to average because the scope sample clock is making most of the dynamic wiggles along the clock edge
Only valid for Rising CLK_IN and Falling CLK_IN#. Signal must be monotonic through the Vol to Voh region for Trise and Tfall.
14. This measurement refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing.
15. Test configuration is; Rs = 27 W, 2 pF for 85 W transmission line.
16. The average period over any 1 ms period of time must be greater than the minimum and less than the maximum specified period.
17. Vcross(rel) Min and Max are derived using the following, Vcross(rel) Min = 0.250 + 0.5 (Vhavg − 0.700), Vcross(rel) Max = 0.550 − 0.5 (0.700
– Vhavg)
18. Measurement taken from Single Ended waveform.
19. Measurement taken from differential waveform. Bypass mode, input duty cycle = 50%.
20. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
21. VHigh is defined as the statistical average High value as obtained by using the Oscilloscope VHigh Math function.
22. VLow is defined as the statistical average Low value as obtained by using the Oscilloscope VLow Math function.
23. Overshoot is defined as the absolute value of the maximum voltage.
24. Undershoot is defined as the absolute value of the minimum voltage.
25. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
26. DVcross is defined as the total variation of all crossing voltages of Rising DIF and Falling DIF#. This is the maximum allowed variance in
Vcross for any particular system.
27. Using frequency counter with the measurement interval equal or greater than 0.15 s, target frequencies are 100,000,000 Hz, 133,333,333 Hz.
28. Using frequency counter with the measurement interval equal or greater than 0.15 s, target frequencies are 99,750,00 Hz, 133,000,000 Hz.
29. Measured with oscilloscope, averaging off, using min max statistics. Variation is the delta between min and max.
30. Measured with oscilloscope, averaging on, The difference between the rising edge rate (average) of DIF versus the falling edge rate
(average) of DIF#. Measured in a ±75 mV window around the crosspoint of DIF and DIF#.
31. Rise/Fall matching is derived using the following, 2*(Trise – Tfall) / (Trise + Tfall).
32. This is the time from the valid CLK_IN input clocks and the assertion of the PWRGD signal level at 1.8 V – 2.0 V to the time that stable clocks
are output from the buffer chip (PLL locked).
33. All Long Term Accuracy specifications are guaranteed with the assumption that the input clock complies with CK410B+/CK420BQ accuracy
requirements. The NB3W800L itself does not contribute to ppm error.
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NB3W800L
Table 13. ELECTRICAL CHARACTERISTICS – Current Consumption
(VDD = VDDA = 3.3 V ±5%, TA = 0°C − 70°C), See Test Loads for Loading Conditions. (Note 35)
Symbol
Parameter
Conditions
Typ
Max
Units
IDDVDD
Operating Current (Note 34)
133 MHz, VDD rail
94
105
mA
133 MHz, VDDA + VDDR rail, PLL Mode
38
50
mA
Power Down, VDD Rail
2.0
3.5
mA
Power Down, VDDA Rail
0.5
1.0
mA
Typ
Max
Units
IDDVDDA
IDDVDDPD
Powerdown Current (Note 34)
IDDVDDAPD
Min
34. Guaranteed by design and characterization, not tested in production.
35. CL = 2 pF with RS = 27 W for Zo = 85 W differential trace impedance.
Table 14. ELECTRICAL CHARACTERISTICS – Skew and Differential Jitter Parameters
(VDD = VDDA = 3.3 V ±5%, TA = 0°C − 70°C), See Test Loads for Loading Conditions.
Symbol
Parameter
Conditions
Min
tSPO_PLL
CLK_IN, DIF[x:0]
(Notes 36, 37, 39, 40, 43)
Input−to−Output Skew in PLL mode
nominal value @ 25°C, 3.3 V
−100
100
ps
tPD_BYP
CLK_IN, DIF[x:0]
(Notes 36, 37, 39, 40, 43)
Input−to−Output Skew in Bypass mode
nominal value @ 25°C, 3.3 V
2.5
4.5
ns
tDSPO_PLL
CLK_IN, DIF[x:0]
(Notes 36, 37, 39, 40, 43)
Input−to−Output Skew Varation in PLL mode
across voltage and temperature
−100
100
ps
tDSPO_BYP
CLK_IN, DIF[x:0]
(Notes 36, 37, 39, 40, 43)
Input−to−Output Skew Varation in Bypass
mode across voltage and temperature
−250
250
ps
tSKEW_ALL
DIF{x:0]
(Notes 36, 37, 39, 43)
Output−to−Output Skew across all outputs
(Common to Bypass and PLL mode)
50
ps
jpeak−hbw
PLL Jitter Peaking
(Notes 36, 42, 43)
HBW_BYP_LBW# = 1
2.5
dB
jpeak−lbw
PLL Jitter Peaking
(Notes 36, 42, 43)
HBW_BYP_LBW# = 0
2
dB
pllHBW
PLL Bandwidth
(Notes 36, 43, 44)
HBW_BYP_LBW# = 1
2
3
4
MHz
pllLBW
PLL Bandwidth
(Notes 36, 43, 44)
HBW_BYP_LBW# = 0
0.7
1
1.4
MHz
tDC
Duty Cycle (Note 36, 46)
Measured differentially, PLL and Bypass Mode
45
50
55
%
tDCD
Duty Cycle Distortion
(Notes 36, 45)
Measured differentially, Bypass Mode
@ 100 MHz
−2
0
2
%
tjcyc−cyc
Jitter, Cycle to cycle
(Notes 36, 46)
PLL mode
50
ps
Additive Jitter in Bypass Mode
50
ps
36. CL = 2 pF with RS = 27 W for Zo = 85 W differential trace impedance. Input to output skew is measured at the first output edge following the
corresponding input.
37. Measured from differential cross−point to differential cross−point. This parameter can be tuned with external feedback path, if present.
38. All Bypass Mode Input−to−Output specs refer to the timing between an input edge and the specific output edge created by it.
39. This parameter is deterministic for a given device
40. Measured with scope averaging on to find mean value.
41. t is the period of the input clock
42. Measured as maximum pass band gain. At frequencies within the loop BW, highest point of magnification is called PLL jitter peaking.
43. Guaranteed by design and characterization, not tested in production.
44. Measured at 3 db down or half power point.
45. Duty cycle distortion is the difference in duty cycle between the output and the input clock when the device is operated in bypass mode.
46. Measured from differential waveform. Bypass mode, input duty cycle = 50%.
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NB3W800L
Table 15. ELECTRICAL CHARACTERISTICS – PHASE JITTER PARAMETERS
(VDD = VDDA = 3.3 V ±5%, TA = 0°C − 70°C), See Test Loads for Loading Conditions. (Note 35)
Symbol
Max
Units
tjphPCIeG1
Parameter
PCIe Gen 1 (Notes 48, 49)
86
ps (p−p)
tjphPCIeG2
PCIe Gen 2 Lo Band
10 kHz < f < 1.5 MHz (Note 48)
3
ps (rms)
PCIe Gen 2 High Band
1.5 MHz < f < Nyquist (50 MHz) (Note 48)
3.1
ps (rms)
PCIe Gen 3
(PLL BW of 2−4 MHz, CDR = 10 MHz)
(Notes 48, 50)
1
ps (rms)
QPI & SMI
(100 MHz or 133 MHz, 4.8 Gb/s, 6.4 Gb/s 12 UI)
(Note 51)
0.5
ps (rms)
QPI & SMI
(100 MHz, 8.0 Gb/s, 12 UI) (Note 51)
0.3
ps (rms)
QPI & SMI
(100 MHz, 9.6 Gb/s, 12 UI) (Note 51)
0.2
ps (rms)
tjphPCIeG1
PCIe Gen 1 (Notes 48, 49)
10
ps (p−p)
tjphPCIeG2
PCIe Gen 2 Lo Band
10 kHz < f < 1.5 MHz (Notes 48, 52)
0.3
ps (rms)
PCIe Gen 2 High Band 1.5 MHz < f < Nyquist
(50 MHz) (Notes 48, 52)
0.6
ps (rms)
PCIe Gen 3
(PLL BW of 2−4 MHz, 2−5 MHz,
CDR = 10 MHz) (Notes 48, 50, 52)
0.2
ps (rms)
QPI & SMI
(100 MHz or 133 MHz, 4.8 Gb/s,
6.4 Gb/s 12 UI) (Notes 51, 52)
0.2
ps (rms)
QPI & SMI
(100 MHz, 8.0 Gb/s, 12 UI) (Notes 51, 52)
0.1
ps (rms)
QPI & SMI
(100 MHz, 9.6 Gb/s, 12 UI) (Notes 51, 52)
0.1
ps (rms)
tjphPCIeG3
Phase Jitter, PLL Mode
(Note 47)
tjphQPI_SMI
tjphPCIeG3
tjphQPI_SMI
Additive Phase Jitter,
Bypass mode
(Note 47)
Conditions
Min
Typ
47. Applies to all outputs.
48. See http://www.pcisig.com for complete specs
49. Sample size of at least 100K cycles. This figures extrapolates to 108ps pk−pk @ 1M cycles for a BER of 1−12.
50. Subject to final ratification by PCI SIG.
51. Calculated from Intel−supplied Clock Jitter Tool v 1.6.3
52. For RMS figures, additive jitter is calculated by solving the following equation: (Additive jitter)2 = (total jittter)2 - (input jitter)2
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9
NB3W800L
Table 16. CLOCK PERIODS – Differential Outputs with Spread Spectrum Disabled
Measurement Window
1 Clock
1 ms
0.1 s
0.1 s
0.1 s
1 ms
1 Clock
Center
Freq.
MHz
−c2c
Jitter
Abs
Per Min
−SSC
Short−Term
Average
Min
− ppm
Long−Term
Average
Min
0 ppm
Period
Nominal
+ ppm
Long−Term
Average
Max
+SSC
Short−Term
Average
Max
+c2c
Jitter
Abs
Per Max
Units
DIF
(Notes 53, 54, 55)
100.00
9.94900
9.99900
10.00000
10.00100
10.05100
ns
DIF
(Notes 53, 54, 56)
133.33
7.44925
7.49925
7.50000
7.50075
7.55075
ns
SSC OFF
Table 17. CLOCK PERIODS – Differential Outputs with Spread Spectrum Enabled
Measurement Window
1 Clock
1 ms
0.1 s
0.1 s
0.1 s
1 ms
1 Clock
Center
Freq.
MHz
−c2c
Jitter
Abs
Per Min
−SSC
Short−Term
Average
Min
− ppm
Long−Term
Average
Min
0 ppm
Period
Nominal
+ ppm
Long−Term
Average
Max
+SSC
Short−Term
Average
Max
+c2c
Jitter
Abs
Per Max
Units
DIF
(Notes 53, 54, 55)
99.75
9.94906
9.99906
10.02406
10.02506
10.02607
10.05107
10.10107
ns
DIF
(Notes 53, 54, 56)
133.00
7.44930
7.49930
7.51805
7.51880
7.51955
7.53830
7.58830
ns
SSC ON
53. Guaranteed by design and characterization, not tested in production.
54. All Long Term Accuracy specifications are guaranteed with the assumption that the input clock complies with CK420BQ/CK410B+ accuracy
requirements (±100 ppm). The device itself does not contribute to ppm error.
55. Driven by SRC output of main clock, 100 MHz PLL Mode or Bypass mode
56. Driven by CPU output of main clock, 133 MHz PLL Mode or Bypass mode
Measurement Points for Differential
DIFFX#
Trise (DIFFX)
VOH = 0.525 V
VCross
VOL = 0.175 V
DIFFX
Tfall (DIFFX#)
Figure 3. Single−Ended Measurement Points for Trise, Tfall
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10
NB3W800L
Measurement Points for Differential
Vovs
VHigh
Vrb
Vrb
VLow
Vuds
Figure 4. Single−Ended Measurement Points for Vovs, Vuds, Vrb
TPeriod
High Duty Cycle%
Low Duty Cycle%
Skew measurement point
0.0 V
Figure 5. Differential (DIFFX – DIFFX#) Measurement Points (Tperiod, Duty Cycle, Jitter)
Test Loads
Differential Output Terminations
DIF Zo (W)
Rs (W)
100
33
85
27
Rs
10 inches
85 W Differential Zo
2 pF
Rs
Low−Power
HCSL−
Compatible
Output Buffer
Figure 6. Differential Test Loads
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11
2 pF
NB3W800L
SIGNAL AND FEATURE OPERATION
CLK_IN, CLK_IN#
PWRGD / PWRDN#
The differential input clock is expected to be sourced from
a clock synthesizer with an HCSL−compatible output, e.g.
CK420BQ, CK−NET, CK−uS, or CK509B or another
driver.
PWRGD is asserted high and de−asserted low. De−assertion
of PWRGD (pulling the signal low) is equivalent to
indicating a powerdown condition. PWRGD (assertion) is
used by the NB3W800L to sample initial configurations
such as frequency select condition.
After PWRGD has been asserted high for the first time,
the pin becomes a PWRDN# (Power Down) pin that can be
used to shut off all clocks cleanly and instruct the device to
invoke power savings mode. PWRDN# is a completely
asynchronous active low input. When entering power
savings mode, PWRDN# should be asserted low prior to
shutting off the input clock or power to ensure all clocks shut
down in a glitch free manner.
The assertion and de−assertion of PWRDN# is absolutely
asynchronous.
When PWRDN# is sampled low by two consecutive
rising edges of DIF#, all differential outputs are held
tri−stated on the next DIF# high to low transition.
OE# and Output Enables (Control Registers)
Each output can be individually enabled or disabled by
SMBus control register bits. Additionally, each output of the
DIF[7:0] has a dedicated OE# pin. The OE# pins are
asynchronous asserted−low signals. The Output Enable bits
in the SMBus registers are active high and are set to enable
by default.
The disabled state for the NB3W800L low power NMOS
Push−Pull outputs is Low/Low.
Please note that the logic level for assertion or deassertion
is different in software than it is on hardware. Output is
enabled if OE# pin is pulled low and still maintains software
programming logic with output enabled if OE register is true.
The assertion and de−assertion of this signal is absolutely
asynchronous.
HBW_BYPASS_LBW#
The HBW_BYPASS_LBW# is a tri level function input
pin. It is used to select between PLL high bandwidth, bypass
mode and PLL low bandwidth mode.
OE# Assertion (Transition from ‘1’ to ‘0’)
All differential outputs that were tristated will resume
normal operation in a glitch free manner.
Device Power Up Sequence
OE# De−Assertion (Transition from ‘0’ to ‘1’)
The device power up should follow the sequence
mentioned below for proper functioning of the device:
PWRGD/PWRDN# should be asserted Low. All other
Control pins should be defined to the required state. Power
should be given to the device. PWRGD/PWRDN# should be
asserted High.
Note: if no clock is present on the CLK_IN/CLK_IN#
pins, whenever device is Powered Up,there will be no clock
on DIF/DIF# outputs
Corresponding output will transition from normal
operation to tri−state in a glitch free manner.
100M_133M# − Frequency Selection
The 100M_133M# is a hardware pin, which programs the
appropriate output frequency of the DIF pairs. Note that the
CLK_IN frequency is equal to CLK_OUT frequency. An
external pull−up or pull−down resistor is attached to this pin
to select the input/output frequency.
POWER FILTERING EXAMPLE
V3P3
Place at pin
FB1
R1
FERRITE
2.2
VDDA
C9
1 mF
R2
2.2
VDD for PLL
C7
0.1 mF
VDDR
C10
1 mF
VDD for Input Receiver
VDD_DIF
C8
0.1 mF
C5
0.1 mF
C6
0.1 mF
C5
0.1 mF
C6
0.1 mF
VDD_DIF
C1
10 mF
C4
0.1 mF
C2
0.1 mF
C3
0.1 mF
Figure 7. Schematic Example of the NB3W800L Power Filtering
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12
NB3W800L
General SMBus Serial Interface Information for NB3W800L
How to Write
•
•
•
•
•
•
•
•
•
•
How to Read
•
•
•
•
•
•
•
•
•
•
•
Controller (host) sends a start bit
Controller (host) sends the write address
Clock(device) will acknowledge
Controller (host) sends the beginning byte location = N
Clock(device) will acknowledge
Controller (host) sends the byte count = X
Clock(device) will acknowledge
Controller (host) starts sending Byte N through Byte
N+X−1
Clock(device) will acknowledge each byte one at a
time
Controller (host) sends a Stop bit
•
•
•
Index Block Write Operation
Controller (Host)
T
Clock (Device)
Controller (host) will send a start bit
Controller (host) sends the write address
Clock(device) will acknowledge
Controller (host) sends the beginning byte location = N
Clock(device) will acknowledge
Controller (host) will send a separate start bit
Controller (host) sends the read address
Clock(device) will acknowledge
Clock(device) will send the data byte count = X
Clock(device) sends Byte N+X−1
Clock(device) sends Byte 0 through Byte X (if X(H)
was written to Byte 8)
Controller (host) will need to acknowledge each byte
Controller (host) will send a not acknowledge bit
Controller (host) will send a stop bit
starT bit
Index Block Read Operation
Slave Address
WR
Controller (Host)
WRite
T
ACK
Clock (Device)
starT bit
Slave Address
Beginning Byte = N
WR
ACK
WRite
ACK
Data Byte Count = X
Beginning Byte = N
ACK
ACK
Beginning Byte N
RT
ACK
Repeat starT
Slave Address
O
O
X Byte
O
RD
O
ReaD
ACK
O
O
Data Byte Count = X
Byte N + X − 1
ACK
ACK
P
Beginning Byte N
stoP bit
ACK
O
O
O
X Byte
O
O
O
Byte N + X - 1
N
Not acknowledge
P
stoP bit
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13
NB3W800L
Table 18. SMBus TABLE: PLL MODE, AND FREQUENCY SELECT REGISTER
Byte 0
Pin #
Name
Control Function
Type
Bit 7
48
PLL Mode 1
PLL Operating Mode Rd back 1
R
Bit 6
48
PLL Mode 0
PLL Operating Mode Rd back 0
R
Bit 5
See PLL Operating Mode
Readback Table
Default
Latched at power up
Latched at power up
0
Reserved
0
Bit 3
PLL_SW_EN
Enable S/W control of PLL BW
RW
Bit 2
PLL Mode 1
PLL Operating Mode 1
RW
Bit 1
PLL Mode 0
PLL Operating Mode 0
RW
100M_133M#
Frequency Select Readback
R
NOTE:
1
Reserved
Bit 4
Bit 0
0
47
HW Latch
SMBus Control
0
See PLL Operating Mode
Readback Table
133 MHz
100 MHz
1
1
Latched at power up
Setting bit 3 to ‘1’ allows the user to overide the Latch value from pin 48 via use of bits 2 and 1. Use the values from the PLL
Operating Mode Readback Table. Note that Bits 7 and 6 will keep the value originally latched on pin 48. A warm reset of the
system will have to accomplished if the user changes these bits.
Table 19. SMBus TABLE: OUTPUT CONTROL REGISTER
Byte 1
Pin #
Name
Control Function
Type
0
1
Default
Bit 7
32/33
DIF_5_En
Output Control - ‘0’ overrides OE# pin
RW
Low/Low
Enable
1
Bit 6
28/29
DIF_4_En
Output Control - ‘0’ overrides OE# pin
RW
1
Bit 5
25/26
DIF_3_En
Output Control - ‘0’ overrides OE# pin
RW
1
Bit 4
21/22
DIF_2_En
Output Control - ‘0’ overrides OE# pin
RW
1
Bit 3
Reserved
1
Bit 2
16/17
DIF_1_En
Output Control - ‘0’ overrides OE# pin
RW
Bit 1
13/14
DIF_0_En
Output Control - ‘0’ overrides OE# pin
RW
Bit 0
Low/Low
Enable
1
1
Reserved
1
Table 20. SMBus TABLE: OUTPUT CONTROL REGISTER
Byte 2
Pin #
Name
Control Function
Type
0
1
Default
Bit 7
Reserved
0
Bit 6
Reserved
0
Bit 5
Reserved
0
Bit 4
Reserved
0
Bit 3
Reserved
1
Bit 2
39/40
DIF_7_En
35/36
DIF_6_En
Output Control - ‘0’ overrides OE# pin
Bit 1
Bit 0
RW
Low/Low
Enable
RW
Low/Low
Enable
1
Type
0
1
Default
Reserved
Output Control - ‘0’ overrides OE# pin
1
1
Table 21. SMBus TABLE: RESERVED REGISTER
Byte 3
Pin #
Name
Control Function
Bit 7
Reserved
0
Bit 6
Reserved
0
Bit 5
Reserved
0
Bit 4
Reserved
0
Bit 3
Reserved
0
Bit 2
Reserved
0
Bit 1
Reserved
0
Bit 0
Reserved
0
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14
NB3W800L
Table 22. SMBus TABLE: RESERVED REGISTER
Byte 4
Pin #
Name
Control Function
Type
0
1
Default
Bit 7
Reserved
0
Bit 6
Reserved
0
Bit 5
Reserved
0
Bit 4
Reserved
0
Bit 3
Reserved
0
Bit 2
Reserved
0
Bit 1
Reserved
0
Bit 0
Reserved
0
Table 23. SMBus TABLE: VENDOR & REVISION ID REGISTER
Byte 5
Pin #
Name
Control Function
Bit 7
−
RID3
R
Bit 6
−
RID2
R
REVISION ID
Type
1
Default
0
0
A rev = 0000
Bit 5
−
RID1
Bit 4
−
RID0
R
Bit 3
−
VID3
R
−
−
1
Bit 2
−
VID2
R
−
−
1
R
−
−
1
R
−
−
1
Type
0
1
Default
Bit 1
−
VID1
Bit 0
−
VID0
VENDOR ID
R
0
0
0
Table 24. SMBus TABLE: DEVICE ID
Byte 6
Pin #
Name
Control Function
Bit 7
−
Device ID 7 (MSB)
R
1
Bit 6
−
Device ID 6
R
1
Bit 5
−
Device ID 5
R
1
Bit 4
−
Device ID 4
R
0
Bit 3
−
Device ID 3
R
0
Bit 2
−
Device ID 2
R
1
Bit 1
−
Device ID 1
R
1
Bit 0
−
Device ID 0
R
1
Table 25. SMBus TABLE: BYTE COUNT REGISTER
Byte 7
Pin #
Name
Control Function
Type
0
1
Default
Bit 7
Reserved
0
Bit 6
Reserved
0
Bit 5
Reserved
0
Bit 4
−
BC4
Bit 3
−
BC3
RW
RW
Writing to this register configures how many
bytes will be read back.
Bit 2
−
BC2
Bit 1
−
BC1
RW
Bit 0
−
BC0
RW
www.onsemi.com
15
RW
0
Default value is 8 hex, so
9 bytes (0 to 8) will be
read back by default.
1
0
0
0
NB3W800L
PACKAGE DIMENSIONS
QFN48 6x6, 0.4P
CASE 485DP
ISSUE O
L2
A B
D
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
L1
PIN ONE
REFERENCE
E
L
DETAIL A
2X
DIM
A
A1
A3
b
D
D2
E
E2
e
L
L1
L2
ALTERNATE TERMINAL
CONSTRUCTIONS
0.10 C
2X
L
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSIONS: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.15 AND 0.30mm FROM TERMINAL TIP
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
EXPOSED Cu
A
(A3)
0.10 C
ÉÉÉ
ÉÉÉ
TOP VIEW
0.10 C
DETAIL B
0.08 C
DETAIL B
A1
NOTE 4
SIDE VIEW
C
SEATING
PLANE
ALTERNATE
CONSTRUCTION
SOLDERING FOOTPRINT*
D2
DETAIL A
MOLD CMPD
MILLIMETERS
MIN
MAX
0.80
1.00
0.00
0.05
0.20 REF
0.15
0.25
6.00 BSC
3.90
4.10
6.00 BSC
3.90
4.10
0.40 BSC
0.30
0.50
0.00
0.15
0.08 REF
48X
L
6.30
4.16
13
25
48X
0.63
E2
4.16
1
48
6.30
37
e
48X
e/2
BOTTOM VIEW
b
0.07 C A B
0.05 C
NOTE 3
PKG
OUTLINE
0.40
PITCH
48X
0.25
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
PCIe is a registered trademark of PCI−Special Interest Group (PCI−SIG) Corporation.
Intel is a registered trademark of Intel Corporation in the U.S. and/or other countries.
ON Semiconductor and the
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.
SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed
at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation
or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets
and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended,
or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which
the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or
unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable
copyright laws and is not for resale in any manner.
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For additional information, please contact your local
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NB3W800L/D