9-Output 1.5V PCIe Gen1-2-3 Fanout Buffer
with Zo=100ohms
9DBU0941
DATASHEET
Description
Features/Benefits
The 9DBU0941 is a member of IDT's 1.5V Ultra-Low-Power
(ULP) PCIe family. It has integrated terminations for direct
connection to 100 transmission lines. The device has 9
output enables for clock management, and 3 selectable
SMBus addresses.
• Direct connection to 100 transmission lines; save 36
•
•
Recommended Application
•
1.5V PCIe Gen1-2-3 Fanout Buffer (FOB)
•
•
Output Features
• 9 1–167MHz Low-Power (LP) HCSL DIF pairs with
ZO=100
•
Key Specifications
•
•
•
•
DIF additive cycle-to-cycle jitter < 5ps
DIF output-to-output skew < 60ps
DIF additive phase jitter is < 300fs rms for PCIe Gen3
DIF additive phase jitter < 350s rms for SGMII
•
•
•
•
resistors compared to standard HCSL outputs
47mW typical power consumption; eliminates thermal
concerns
Outputs can optionally be supplied from any voltage
between 1.05 and 1.5V; maximum power savings
Spread Spectrum (SS) compatible; allows SS for EMI
reduction
OE# pins for each output; support DIF power management
HCSL-compatible differential input; can be driven by
common clock sources
SMBus-selectable features; optimize signal integrity to
application
• slew rate for each output
• differential output amplitude
Device contains default configuration; SMBus interface not
required for device operation
Selectable SMBus addresses; multiple devices can easily
share an SMBus segment
3.3V tolerant SMBus interface works with legacy controllers
6 × 6 mm 48-VFQFPN; minimal board space
Block Diagram
vOE(8:0)#
9
DIF8
DIF7
DIF6
CLK_IN
DIF5
CLK_IN#
DIF4
vSADR
DIF3
^CKPWRGD_PD#
SDATA_3.3
CONTROL
LOGIC
SCLK_3.3
9DBU0941 MARCH 9, 2017
DIF2
DIF1
DIF0
1
©2017 Integrated Device Technology, Inc.
9DBU0941 DATASHEET
vOE5#
VDD1.5
VDDIO
GND
DIF6
DIF6#
vOE6#
DIF7
DIF7#
vOE7#
VDDIO
^CKPWRGD_PD#
Pin Configuration
48 47 46 45 44 43 42 41 40 39 38 37
vSADR_tri 1
36 DIF5#
vOE8# 2
35 DIF5
DIF8 3
34 vOE4#
DIF8# 4
33 DIF4#
VDDR1.5 5
32 DIF4
9DBU0941
CLK_IN 6
CLK_IN# 7
31 VDDIO
30 VDDO1.5
epad is GND
GNDR 8
29 GND
GNDDIG 9
28 vOE3#
SCLK_3.3 10
27 DIF3#
SDATA_3.3 11
26 DIF3
VDDDIG1.5 12
25 vOE2#
DIF2
DIF2#
GND
VDDIO
VDD1.5
DIF1#
DIF1
vOE1#
DIF0#
DIF0
vOE0#
VDDIO
13 14 15 16 17 18 19 20 21 22 23 24
48-pin VFQFPN, 6x6 mm, 0.4mm pitch
^v prefix indicates internal 120KOhm pull up AND pull down resistor
(biased to VDD/2)
v prefix indicates internal 120KOhm pull down resistor
^ prefix indicates internal 120KOhm pull up resistor
SMBus Address Selection Table
State of SADR on first application of
CKPWRGD_PD#
SADR
0
M
1
Address
1101011
1101100
1101101
+
Read/Write bit
x
x
x
Power Management Table
CKPWRGD_PD#
CLK_IN
0
1
1
1
X
Running
Running
Running
SMBus
OEx bit
X
0
1
1
OEx# Pin
X
X
0
1
DIFx
True O/P
Comp. O/P
Low
Low
Low
Low
Running
Running
Low
Low
Power Connections
Pin Number
VDD
VDDIO
5
12
20,30,31,38
13,21,31,39,47
GND
Description
8
Input receiver
analog
9
Digital power
22,29,40
DIF outputs
Note: EPAD on this device is not electrically connected to the die.
It should be connected to ground for best thermal performance.
9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
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MARCH 9, 2017
9DBU0941 DATASHEET
Pin Descriptions
PIN #
PIN NAME
1
vSADR_tri
2
vOE8#
3
4
DIF8
DIF8#
5
VDDR1.5
6
7
8
9
10
11
12
13
CLK_IN
CLK_IN#
GNDR
GNDDIG
SCLK_3.3
SDATA_3.3
VDDDIG1.5
VDDIO
14
vOE0#
15
16
DIF0
DIF0#
17
vOE1#
18
19
20
21
22
23
24
DIF1
DIF1#
VDD1.5
VDDIO
GND
DIF2
DIF2#
25
vOE2#
26
27
DIF3
DIF3#
28
vOE3#
29
30
31
32
33
GND
VDDO1.5
VDDIO
DIF4
DIF4#
34
vOE4#
35
36
DIF5
DIF5#
37
vOE5#
38
39
40
VDD1.5
VDDIO
GND
MARCH 9, 2017
TYPE
DESCRIPTION
LATCHED Tri-level latch to select SMBus Address. It has an internal 120kohm pull down
IN
resistor. See SMBus Address Selection Table.
Active low input for enabling output 8. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
1.5V power for differential input clock (receiver). This VDD should be treated as an
PWR
Analog power rail and filtered appropriately.
IN
True input for differential reference clock.
IN
Complementary input for differential reference clock.
GND
Analog ground pin for the differential input (receiver)
GND
Ground pin for digital circuitry.
IN
Clock pin of SMBus circuitry, 3.3V tolerant.
I/O
Data pin for SMBus circuitry, 3.3V tolerant.
PWR
1.5V digital power (dirty power)
PWR
Power supply for differential outputs
Active low input for enabling output 0. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
Active low input for enabling output 1. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
PWR
Power supply, nominally 1.5V
PWR
Power supply for differential outputs
GND
Ground pin.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
Active low input for enabling output 2. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
Active low input for enabling output 3. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
GND
Ground pin.
PWR
Power supply for outputs, nominally 1.5V.
PWR
Power supply for differential outputs
OUT
Differential true clock output.
OUT
Differential complementary clock output.
Active low input for enabling output 4. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
OUT
Differential true clock output.
OUT
Differential complementary clock output.
Active low input for enabling output 5. This pin has an internal 120kohm pull-down.
IN
1 = disable outputs, 0 = enable outputs.
PWR
Power supply, nominally 1.5V
PWR
Power supply for differential outputs
GND
Ground pin.
3
9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
9DBU0941 DATASHEET
Pin Descriptions (cont.)
PIN #
PIN NAME
41 DIF6
42 DIF6#
TYPE
OUT
OUT
43
vOE6#
IN
44
45
DIF7
DIF7#
OUT
OUT
46
vOE7#
IN
47
VDDIO
PWR
48
^CKPWRGD_PD#
49
EPAD
IN
GND
DESCRIPTION
Differential true clock output.
Differential complementary clock output.
Active low input for enabling output 6. This pin has an internal 120kohm pull-down.
1 = disable outputs, 0 = enable outputs.
Differential true clock output.
Differential complementary clock output.
Active low input for enabling output 7. This pin has an internal 120kohm pull-down.
1 = disable outputs, 0 = enable outputs.
Power supply for differential outputs
Input notifies device to sample latched inputs and start up on first high assertion. Low
enters Power Down Mode, subsequent high assertions exit Power Down Mode. This
pin has internal 120kohm pull-up resistor.
Connect EPAD to ground.
Test Loads
Low-Power HCSL Differential Output Test Load
5 inches
Rs
Zo=100
2pF
Rs
2pF
Note: The device can drive transmission line lengths greater
than those allowed by the PCIe SIG
Driving LVDS
3.3V
Driving LVDS
Cc
R7a
R7b
R8a
R8b
Rs
Zo
Cc
Rs
Device
LVDS Clock
input
Driving LVDS inputs
Component
R7a, R7b
R8a, R8b
Cc
Vcm
Value
Receiver has Receiver does not Note
termination have termination
10K ohm
140 ohm
5.6K ohm
75 ohm
0.1µF
0.1µF
1.2 volts
1.2 volts
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MARCH 9, 2017
9DBU0941 DATASHEET
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the 9DBU0941. These ratings, which are standard
values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other
conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the
recommended operating temperature range.
PARAMETER
SYMBOL
CONDITIONS
Supply Voltage
Input Voltage
Input High Voltage, SMBus
Storage Temperature
Junction Temperature
Input ESD protection
VDDx
VIN
VIHSMB
Ts
Tj
ESD prot
Applies to VDD, VDDA and VDDIO
MIN
-0.5
-0.5
TYP
SMBus clock and data pins
-65
Human Body Model
MAX
2
VDD+0.5
3.3
150
125
2000
UNITS NOTES
V
V
V
°C
°C
V
1,2
1,
1
1
1
1
1
Guaranteed by design and characterization, not 100% tested in production.
2
Operation under these conditions is neither implied nor guaranteed.
3
Not to exceed 2.0V.
Electrical Characteristics–Clock Input Parameters
TA = TAMB, Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
Input Common Mode
Voltage - DIF_IN
Input Swing - DIF_IN
Input Slew Rate - DIF_IN
Input Leakage Current
Input Duty Cycle
Input Jitter - Cycle to Cycle
1
2
SYMBOL
CONDITIONS
MIN
TYP
VCOM
Common Mode Input Voltage
200
725
mV
1
VSWING
dv/dt
IIN
dtin
J DIFIn
Differential value
Measured differentially
VIN = VDD , VIN = GND
Measurement from differential waveform
Differential Measurement
300
0.4
-5
45
0
1450
8
5
55
150
mV
V/ns
µA
%
ps
1
1,2
50
MAX
UNITS NOTES
1
1
Guaranteed by design and characterization, not 100% tested in production.
Slew rate measured through +/-75mV window centered around differential zero.
MARCH 9, 2017
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9DBU0941 DATASHEET
Electrical Characteristics–Input/Supply/Common Parameters–Normal Operating
Conditions
TA = TAMB, Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
Supply Voltage
Output Supply Voltage
Ambient Operating
Temperature
Input High Voltage
Input Mid Voltage
Input Low Voltage
VDDx
VDDIO
Supply voltage for core and analog
Low voltage supply LP-HCSL outputs
Commercial range
Industrial range
Single-ended inputs, except SMBus
Single-ended tri-level inputs ('_tri' suffix)
Single-ended inputs, except SMBus
Single-ended inputs, VIN = GND, VIN = VDD
1.425
0.95
0
-40
0.75 VDD
0.4 VDD
-0.3
-5
1.5
1.05-1.5
25
25
1.575
1.575
70
85
VDD + 0.3
0.6 VDD
0.25 VDD
5
V
V
°C
°C
V
V
V
µA
Single-ended inputs
VIN = 0 V; Inputs with internal pull-up resistors
VIN = VDD; Inputs with internal pull-down resistors
-200
200
µA
1
167
7
5
2.7
6
MHz
nH
pF
pF
pF
2
1
1
1,5
1
1
ms
1,2
30
33
kHz
0
66
kHz
1
3
clocks
1,3
300
µs
1,3
5
5
0.6
3.3
0.4
2
2
3.3
1000
300
ns
ns
V
V
V
mA
V
ns
ns
400
kHz
6
Input Current
TAMB
VIH
VIM
VIL
IIN
IINP
Input Frequency
Pin Inductance
Fin
Lpin
CIN
Capacitance
CINDIF_IN
COUT
Clk Stabilization
TSTAB
OE# Latency
tLATOE#
Tdrive_PD#
tDRVPD
Tfall
Trise
SMBus Input Low Voltage
SMBus Input High Voltage
SMBus Output Low Voltage
SMBus Sink Current
Nominal Bus Voltage
SCLK/SDATA Rise Time
SCLK/SDATA Fall Time
SMBus Operating
Frequency
tF
tR
Logic inputs, except DIF_IN
DIF_IN differential clock inputs
Output pin capacitance
From VDD power-up and after input clock
stabilization or de-assertion of PD# to 1st clock
Allowable Frequency for PCIe Applications
(Triangular modulation)
Allowable Frequency for non-PCIe Applications
(Triangular Modulation)
DIF start after OE# assertion
DIF stop after OE# deassertion
DIF output enable after
PD# de-assertion
Fall time of single-ended control inputs
Rise time of single-ended control inputs
VILSMB
VIHSMB
VOLSMB
IPULLUP
VDDSMB
tRSMB
t FSMB
VDDSMB = 3.3V, see note 4 for VDDSMB < 3.3V
at IPULLUP
at VOL
Bus Voltage
(Max VIL - 0.15V) to (Min VIH + 0.15V)
(Min VIH + 0.15V) to (Max VIL - 0.15V)
fMAXSMB
Maximum SMBus operating frequency
Input SS Modulation
Frequency PCIe
Input SS Modulation
Frequency non-PCIe
fMODINPCIe
fMODIN
1.5
1.5
2.1
4
1.425
UNITS NOTES
1
1
4
1
1
1
Guaranteed by design and characterization, not 100% tested in production.
Control input must be monotonic from 20% to 80% of input swing.
3
Time from deassertion until outputs are > 200 mV.
4
For VDDSMB < 3.3V, VIHSMB > = 0.8xVDDSMB.
5
DIF_IN input.
2
6
The differential input clock must be running for the SMBus to be active.
9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
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MARCH 9, 2017
9DBU0941 DATASHEET
Electrical Characteristics–DIF Low-Power HCSL Outputs
TA = TAMB, Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
Scope averaging on, fast setting
Scope averaging on, slow setting
Slew rate matching, scope averaging on
1
0.7
Slew Rate Matching
dV/dt
dV/dt
ΔdV/dt
2.4
1.7
9
3.5
2.5
20
Voltage High
VHIGH
630
750
850
Slew Rate
Voltage Low
VLOW
Statistical measurement on single-ended signal
using oscilloscope math function. (Scope
averaging on)
Max Voltage
Min Voltage
Vswing
Crossing Voltage (abs)
Crossing Voltage (var)
Vmax
Vmin
Vswing
Vcross_abs
Δ-Vcross
Measurement on single ended signal using
absolute value. (Scope averaging off)
Scope averaging off
Scope averaging off
Scope averaging off
MAX UNITS NOTES
V/ns
V/ns
%
1,2,3
1,2,3
1,2,4
7
mV
-150
26
150
763
22
1448
390
11
1150
-300
300
250
550
140
7
mV
mV
mV
mV
7
7
1,2
1,5
1,6
1
Guaranteed by design and characterization, not 100% tested in production.
Measured from differential waveform
2
3
Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window around
differential 0V.
4
Matching applies to rising edge rate for Clock and falling edge rate for Clock#. It is measured using a +/-75mV window centered on
the average cross point where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage thresholds the
oscilloscope is to use for the edge rate calculations.
5
Vcross is defined as voltage where Clock = Clock# measured on a component test board and only applies to the differential rising
edge (i.e. Clock rising and Clock# falling).
6
The total variation of all Vcross measurements in any particular system. Note that this is a subset of Vcross_min/max (Vcross
absolute) allowed. The intent is to limit Vcross induced modulation by setting Δ-Vcross to be smaller than Vcross absolute.
7
At default SMBus settings.
Electrical Characteristics–Current Consumption
TA = TAMB; Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
Operating Supply Current
Powerdown Current
1
2
SYMBOL
CONDITIONS
TYP
MAX
UNITS
IDDA
VDDO1.5+VDDR, at 100MHz
MIN
2.3
3
mA
IDDx
VDDx, All outputs active at 100MHz
4.5
6
mA
IDDIO
IDDAPD
IDDxPD
IDDIOPD
VDDIO, All outputs active at 100MHz
33
0.4
0.2
0.001
40
mA
1
0.6
0.1
mA
mA
mA
VDDO1.5+VDDR, CKPWRGD_PD# = 0
VDDx, CKPWRGD_PD# = 0
VDDIO, CKPWRGD_PD# = 0
NOTES
2
2
2
Guaranteed by design and characterization, not 100% tested in production.
Input clock stopped.
MARCH 9, 2017
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9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
9DBU0941 DATASHEET
Electrical Characteristics–Output Duty Cycle, Jitter, Skew and PLL Characteristics
TA = TAMB, Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
NOTES
Duty Cycle Distortion
Skew, Input to Output
Skew, Output to Output
Jitter, Cycle to Cycle
tDCD
tpdBYP
tsk3
Measured differentially, at 100MHz
VT = 50%
VT = 50%
-1
2400
-0.2
2862
30
0.5
3700
60
%
ps
ps
1,3
1
1,4
tjcy c-cy c
Additive Jitter
0.1
5
ps
1,2
1
Guaranteed by design and characterization, not 100% tested in production.
2
Measured from differential waveform.
3
Duty cycle distortion is the difference in duty cycle between the output and the input clock.
4
All outputs at default slew rate.
Electrical Characteristics–Phase Jitter Parameters
TA = TAMB, Supply voltages per normal operation conditions; see Test Loads for loading conditions
PARAMETER
SYMBOL
CONDITIONS
tjphPCIeG1
PCIe Gen 1
PCIe Gen 2 Lo Band
10kHz < f < 1.5MHz
PCIe Gen 2 High Band
1.5MHz < f < Nyquist (50MHz)
PCIe Gen 3
(2-4MHz or 2-5MHz, CDR = 10MHz)
tjphPCIeG2
Additive Phase Jitter
tjphPCIeG3
MIN
INDUSTRY
LIMIT
UNITS
TYP
MAX
0.1
5
N/A
0.1
0.4
N/A
0.1
0.7
N/A
0.1
0.3
N/A
ps (p-p)
ps
(rms)
ps
(rms)
ps
(rms)
Notes
1,2,3,5
1,2,3,4,
5
1,2,3,4
1,2,3,4
tjphSGMIIM0
125MHz, 1.5MHz to 10MHz, -20dB/decade
rollover < 1.5MHz, -40db/decade rolloff > 10MHz
200
250
N/A
fs
(rms)
1,6
tjphSGMIIM1
125MHz, 12kHz to 20MHz, -20dB/decade rollover
< 1.5MHz, -40db/decade rolloff > 10MHz
313
350
N/A
fs
(rms)
1,6
1
Guaranteed by design and characterization, not 100% tested in production.
See http://www.pcisig.com for complete specs.
2
3
Sample size of at least 100K cycles. This figure extrapolates to 108ps pk-pk @ 1M cycles for a BER of 1-12.
4
For RMS figures, additive jitter is calculated by solving the following equation: Additive jitter = SQRT[(total jitter)^2 - (input jitter)^2].
Driven by 9FGV0831 or equivalent.
Rohde & Schwarz SMA100.
5
6
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9DBU0941 DATASHEET
Additive Phase Jitter Plot: 125M (12kHz to 20MHz)
RMS additive jitter: 313fs
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9DBU0941 DATASHEET
General SMBus Serial Interface Information
How to Write
How to Read
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Controller (host) sends a start bit
Controller (host) sends the write address
IDT clock will acknowledge
Controller (host) sends the beginning byte location = N
IDT clock will acknowledge
Controller (host) sends the byte count = X
IDT clock will acknowledge
Controller (host) starts sending Byte N through Byte
N+X-1
IDT clock will acknowledge each byte one at a time
Controller (host) sends a stop bit
•
•
•
Controller (host) will send a start bit
Controller (host) sends the write address
IDT clock will acknowledge
Controller (host) sends the beginning byte location = N
IDT clock will acknowledge
Controller (host) will send a separate start bit
Controller (host) sends the read address
IDT clock will acknowledge
IDT clock will send the data byte count = X
IDT clock sends Byte N+X-1
IDT clock 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
Index Block Write Operation
Controller (Host)
T
Index Block Read Operation
IDT (Slave/Receiver)
Controller (Host)
starT bit
T
Slave Address
WR
IDT (Slave/Receiver)
starT bit
Slave Address
WRite
WR
WRite
ACK
ACK
Beginning Byte = N
Beginning Byte = N
ACK
ACK
Data Byte Count = X
RT
ACK
Slave Address
Beginning Byte N
RD
ACK
O
O
ACK
O
Data Byte Count=X
O
ACK
O
Beginning Byte N
Byte N + X - 1
ACK
ACK
P
ReaD
stoP bit
X Byte
X Byte
O
Repeat starT
O
O
O
O
O
O
Note: SMBus Address is Latched on SADR pin.
9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
Byte N + X - 1
10
N
Not acknowledge
P
stoP bit
MARCH 9, 2017
9DBU0941 DATASHEET
SMBus Table: Output Enable Register 1
Byte 0
Name
Control Function
Type
0
DIF OE7
Output Enable
RW
Low/Low
Bit 7
DIF OE6
Output Enable
RW
Low/Low
Bit 6
DIF
OE5
Output
Enable
RW
Low/Low
Bit 5
DIF OE4
Output Enable
RW
Low/Low
Bit 4
DIF OE3
Output Enable
RW
Low/Low
Bit 3
DIF OE2
Output Enable
RW
Low/Low
Bit 2
DIF OE1
Output Enable
RW
Low/Low
Bit 1
DIF OE0
Output Enable
RW
Low/Low
Bit 0
1. A low on these bits will override the OE# pin and force the differential output Low/Low
SMBus Table: Output Enable and Output Amplitude Control Register
Byte 1
Name
Control Function
Type
0
Reserved
Bit 7
Reserved
Bit 6
DIF OE8
Output Enable
RW
Low/Low
Bit 5
Reserved
Bit 4
Reserved
Bit 3
Reserved
Bit 2
AMPLITUDE 1
RW
00 = 0.55V
Bit 1
Controls Output Amplitude
AMPLITUDE
0
RW
10 = 0.7V
Bit 0
1. A low on the DIF OE bit will override the OE# pin and force the differential output Low/Low
SMBus Table: DIF Slew Rate Control Register
Byte 2
Name
Control Function
SLEWRATESEL DIF7
Adjust Slew Rate of DIF7
Bit 7
SLEWRATESEL DIF6
Adjust Slew Rate of DIF6
Bit 6
SLEWRATESEL DIF5
Adjust Slew Rate of DIF5
Bit 5
SLEWRATESEL DIF4
Adjust Slew Rate of DIF4
Bit 4
SLEWRATESEL DIF3
Adjust Slew Rate of DIF3
Bit 3
SLEWRATESEL DIF2
Adjust Slew Rate of DIF2
Bit 2
SLEWRATESEL DIF1
Adjust Slew Rate of DIF1
Bit 1
SLEWRATESEL DIF0
Adjust Slew Rate of DIF0
Bit 0
SMBus Table: DIF Slew Rate Control Register
Byte 3
Name
Control Function
Reserved
Bit 7
Reserved
Bit 6
Reserved
Bit 5
Reserved
Bit 4
Reserved
Bit 3
Reserved
Bit 2
Reserved
Bit 1
SLEWRATESEL DIF8
Adjust Slew Rate of DIF8
Bit 0
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
Slow Setting
Slow Setting
Slow Setting
Slow Setting
Slow Setting
Slow Setting
Slow Setting
Slow Setting
Type
0
RW
Slow Setting
1
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Default
1
1
1
1
1
1
1
1
1
Default
0
1
1
0
1
1
1
0
Enabled
01= 0.65V
11 = 0.8V
Fast
Fast
Fast
Fast
Fast
Fast
Fast
Fast
1
Setting
Setting
Setting
Setting
Setting
Setting
Setting
Setting
Default
1
1
1
1
1
1
1
1
1
Default
1
1
0
0
Fast Setting
0
1
1
1
Byte 4 is Reserved and reads back 'hFF
MARCH 9, 2017
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9DBU0941 DATASHEET
SMBus Table: Revision and Vendor ID Register
Byte 5
Name
Control Function
RID3
Bit 7
RID2
Bit 6
Revision ID
RID1
Bit 5
RID0
Bit 4
VID3
Bit 3
VID2
Bit 2
VENDOR ID
VID1
Bit 1
VID0
Bit 0
Type
R
R
R
R
R
R
R
R
SMBus Table: Device Type/Device ID
Byte 6
Name
Device Type1
Bit 7
Device Type0
Bit 6
Device ID5
Bit 5
Device ID4
Bit 4
Device ID3
Bit 3
Device ID2
Bit 2
Device ID1
Bit 1
Device ID0
Bit 0
Type
R
R
R
R
R
R
R
R
SMBus Table: Byte Count Register
Byte 7
Name
Bit 7
Bit 6
Bit 5
BC4
Bit 4
BC3
Bit 3
BC2
Bit 2
BC1
Bit 1
BC0
Bit 0
Control Function
Device Type
Device ID
Control Function
Reserved
Reserved
Reserved
Byte Count Programming
9-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS
12
Type
RW
RW
RW
RW
RW
0
1
A rev = 0000
0001 = IDT
0
1
00 = FGx, 01 = DBx,
10 = DMx, 11= DBx w/oPLL
001001binary or 09 hex
0
Default
0
0
0
0
0
0
0
1
Default
1
1
0
0
1
0
0
1
1
Default
0
0
0
0
Writing to this register will configure how
1
many bytes will be read back, default is
0
= 8 bytes.
0
0
MARCH 9, 2017
9DBU0941 DATASHEET
Marking Diagrams
ICS
DBU0941AL
YYWW
COO
LOT
ICS
BU0941AIL
YYWW
COO
LOT
Notes:
1. “LOT” is the lot sequence number.
2. “COO” denotes country of origin.
3. YYWW is the last two digits of the year and week that the part was assembled.
4. Line 2: truncated part number
5. “L” denotes RoHS compliant package.
6. “I” denotes industrial temperature range device.
Thermal Characteristics
PARAMETER
SYMBOL
CONDITIONS
PKG
Thermal Resistance
θJC
θJb
θJA0θ
θJA1
θJA3
θJA5
Junction to Case
Junction to Base
Junction to Air, still air
Junction to Air, 1 m/s air flow
Junction to Air, 3 m/s air flow
Junction to Air, 5 m/s air flow
NDG48
TYP
VALUE
33
2.1
37
30
27
26
UNITS
NOTES
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
1
1
1
1
1
1
1
ePad soldered to board
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Package Outline and Dimensions (NDG48)
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14
MARCH 9, 2017
9DBU0941 DATASHEET
Package Outline and Dimensions (NDG48), cont.
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Ordering Information
Part / Order Number Shipping Packaging
9DBU0941AKLF
Trays
9DBU0941AKLFT
Tape and Reel
9DBU0941AKILF
Trays
9DBU0941AKILFT
Tape and Reel
Package
48-pin VFQFPN
48-pin VFQFPN
48-pin VFQFPN
48-pin VFQFPN
Temperature
0 to +70° C
0 to +70° C
-40 to +85° C
-40 to +85° C
“LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.
“A” is the device revision designator (will not correlate with the datasheet revision).
Revision History
Rev.
A
B
C
D
E
Initiator Issue Date Description
RDW
7/15/2014 Final update and release - front page and electrical tables.
Updated SMBus Input High/Low parameters conditions, MAX values, and
RDW
9/19/2014
footnotes.
1. Minor updates to front page text for family consistency.
RDW
4/17/2015 2. Updated Clock Input Parameters table to be consistent with PCIe
Vswing parameter.
1. Updated pins 30 and 29 from VDDA1.5 and GNDA to VDDO1.5 and
RDW
2/16/2017
GND to clearly indicate that this part has no PLL.
1. Removed "Bypass Mode" reference in "Output Duty Cycle..." and
"Phase Jitter Parameters" tables; update note 3 under Output Duty Cycle
table.
RDW
3/9/2017
2. Corrected spelling errors/typos.
3. Change VDDA to VDDO1.5 in Current Consumption table.
4. Update Additive Phase Jitter conditions for PCIe Gen3.
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Page #
Various
6
1,5
2, 3
7,8
MARCH 9, 2017
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9DBU0941 MARCH 9, 2017
17
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