DATASHEET
Six Output Differential Buffer for PCIe Gen3
9DB633
Features/Benefits:
•
OE# pins/Suitable for Express Card applications
•
PLL or bypass mode/PLL can dejitter incoming clock
•
Selectable PLL bandwidth/minimizes jitter peaking in
downstream PLL's
•
Spread Spectrum Compatible/tracks spreading input
clock for low EMI
•
SMBus Interface/unused outputs can be disabled
Recommended Application:
6 output PCIe Gen3 zero-delay/fanout buffer
General Description:
The 9DB633 zero-delay buffer supports PCIe Gen3
requirements, while being backwards compatible to PCIe
Gen2 and Gen1. The 9DB633 is driven by a differential SRC
output pair from an IDT 932S421 or 932SQ420 or equivalent
main clock generator. It attenuates jitter on the input clock
and has a selectable PLL bandwidth to maximize
performance in systems with or without Spread-Spectrum
clocking. An SMBus interface allows control of the PLL
bandwidth and bypass options, while 2 clock request (OE#)
pins make the 9DB633 suitable for Express Card
applications.
Output Features:
•
6 - 0.7V current mode differential HCSL output pairs
Key Specifications:
•
Cycle-to-cycle jitter < 50 ps
•
Output-to-output skew < 50 ps
•
PCIe Gen3 phase jitter < 1.0ps RMS
Block Diagram
OE1#
OE4#
DIF1
SRC_IN
SRC_IN#
SPREAD
COMPATIBLE
PLL
DIF4
PLL_BW
SMBDAT
SMBCLK
DIF(0,2,3,5)
CONTROL
LOGIC
IREF
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
1
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
PLL_BW
SRC_IN
SRC_IN#
vOE1#
DIF_0
DIF_0#
VDD
GND
DIF_1
DIF_1#
DIF_2
DIF_2#
VDD
SMBDAT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
9DB633
Pin Configuration
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VD DA
GNDA
IREF
vOE4#
DIF_5
DIF_5#
VD D
GND
DIF_4
DIF_4#
DIF_3
DIF_3#
VD D
SMBCLK
Note:Pins preceeded by ' v ' have internal
120K ohm pull down resistors
Power Distribution Table
Pin Number
VDD
GND
7, 13, 16, 22
8,21
13
8
N/A
27
28
27
Description
Differential Outputs
SMBus
IREF
Analog VDD & GND for PLL core
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
2
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Pin Description
PIN #
PIN NAME
PIN TYPE
1
PLL_BW
IN
2
3
SRC_IN
SRC_IN#
IN
IN
4
vOE1#
IN
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DIF_0
DIF_0#
VDD
GND
DIF_1
DIF_1#
DIF_2
DIF_2#
VDD
SMBDAT
SMBCLK
VDD
DIF_3#
DIF_3
DIF_4#
DIF_4
GND
VDD
DIF_5#
DIF_5
25
vOE4#
OUT
OUT
PWR
IN
OUT
OUT
OUT
OUT
PWR
I/O
IN
PWR
OUT
OUT
OUT
OUT
PWR
PWR
OUT
OUT
IN
26
IREF
OUT
27
28
GNDA
VDDA
PWR
PWR
DESCRIPTION
3.3V input for selecting PLL Band Width
0 = low, 1= high
0.7 V Differential SRC TRUE input
0.7 V Differential SRC COMPLEMENTARY input
Active low input for enabling DIF pair 1. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
0.7V differential true clock output
0.7V differential Complementary clock output
Power suppl y, nominal 3.3V
Ground pin.
0.7V differential true clock output
0.7V differential Complementary clock output
0.7V differential true clock output
0.7V differential Complementary clock output
Power suppl y, nominal 3.3V
Data pin of SMBUS circuitry, 5V tolerant
Clock pin of SMBUS circuitry, 5V tolerant
Power suppl y, nominal 3.3V
0.7V differential Complementary clock output
0.7V differential true clock output
0.7V differential Complementary clock output
0.7V differential true clock output
Ground pin.
Power suppl y, nominal 3.3V
0.7V differential Complementary clock output
0.7V differential true clock output
Active low input for enabling DIF pair 4. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
This pi n establishes the reference for the differential current-mode output pairs. It
requires a fixed precision resistor to ground. 475ohm is the standard value for
100ohm differential impedance. Other impedances require different values. See
data sheet.
Ground pin for the PLL core.
3.3V power for the PLL core.
Note:
Pins preceeded by ' v ' have internal 120K ohm pull down resistors
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
3
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Electrical Characteristics - Absolute Maximum Ratings
PARAMETER
SYMBOL
3.3V Core Supply Voltage
3.3V Logic Supply Voltage
Input Low Voltage
Input High Voltage
Input High Voltage
VDDA
VDD
VIL
VIH
VIHSMB
Storage Temperature
Junction Temperature
Input ESD protection
Ts
Tj
ESD prot
CONDITIONS
MIN
TYP
UNITS NOTES
MAX
4.6
4.6
V
V
V
V
V
GND-0.5
Except for SMBus interface
SMBus clock and data pins
VDD+0.5V
5.5V
-65
Human Body Model
1,2
1,2
1
1
1
1
1
1
°
150
125
C
°C
V
2000
1
Guaranteed by design and characterization, not 100% tested in production.
2
Operation under these conditions is neither implied nor guaranteed.
Electrical Characteristics - Input/Supply/Common Parameters
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
Ambient Operating
Temperature
TCOM
TIND
Input High Voltage
VIH
Input Low Voltage
VIL
I IN
Input Current
Input Frequency
Pin Inductance
Capacitance
IINP
Fibyp
Fipll
Lpin
CIN
CINDIF_IN
CONDITIONS
MIN
Commmercial range
Industrial range
Single-ended inputs, except SMBus, low
threshold and tri-level inputs
Single-ended inputs, except SMBus, low
threshold and tri-level inputs
Single-ended inputs, VIN = GND, VIN = VDD
0
-40
TYP
MAX
70
85
UNITS NOTES
°C
°C
1
1
2
VDD + 0.3
V
1
GND - 0.3
0.8
V
1
-5
5
uA
1
Single-ended inputs
VIN = 0 V; Inputs with internal pull-up resistors
VIN = VDD; Inputs with internal pull-down resistors
-200
200
uA
1
VDD = 3.3 V, Bypass mode
VDD = 3.3 V, 100MHz PLL mode
10
33
Logic Inputs, except DIF_IN
DIF_IN differential clock inputs
1.5
1.5
110
110
7
5
2.7
MHz
MHz
nH
pF
pF
2
2
1
1
1,4
100.00
COUT
Output pin capacitance
6
pF
1
Clk Stabilization
TSTAB
From VDD Power-Up and after input clock
stabilization or de-assertion of PD# to 1st clock
1.8
ms
1,2
Input SS Modulation
Frequency
f MODIN
Allowable Frequency
(Triangular Modulation)
30
33
kHz
1
OE# Latency
t LATOE#
1
3
cycles
1,3
Tdrive_PD#
t DRVPD
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
DIF start after OE# assertion
DIF stop after OE# deassertion
DIF output enable after
PD# de-assertion
Fall time of control inputs
Rise time of control inputs
VILSMB
V IHSMB
VOLSMB
I PULLUP
VDDSMB
t RSMB
t FSMB
@ I PULLUP
@ VOL
3V to 5V +/- 10%
(Max VIL - 0.15) to (Min VIH + 0.15)
(Min VIH + 0.15) to (Max VIL - 0.15)
f MAXSMB
Maximum SMBus operating frequency
2.1
4
2.7
300
us
1,3
5
5
0.8
5.5
1000
300
ns
ns
V
V
V
mA
V
ns
ns
1,2
1,2
1
1
1
1
1
1
1
100
kHz
1,5
VDDSMB
0.4
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
DIF_IN input
2
5
The differential input clock must be running for the SMBus to be active
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
4
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Electrical Characteristics - DIF_IN Clock Input Parameters
TAMB=TCOM or TIND unless otherwise indicated, Supply Voltages per normal operation conditions, See Test Loads for Loading Conditions
PARAMETER
Input Crossover Voltage DIF_IN
Input Swing - DIF_IN
Input Slew Rate - DIF_IN
SYMBOL
CONDITIONS
MIN
TYP
MAX
VCROSS
Cross Over Voltage
150
375
900
V SWING
Differential value
300
dv/dt
Measured differentially
1
UNITS NOTES
mV
1
mV
1
8
V/ns
1,2
Input Leakage Current
I IN
V IN = VDD , V IN = GND
-5
5
uA
Input Duty Cycle
dtin
Measurement from differential wavefrom
45
55
%
1
Input Jitter - Cycle to Cycle
J DIFIn
Differential Measurement
0
125
ps
1
1
Guaranteed by design and characterization, not 100% tested in production.
2
Slew rate measured through +/-75mV window centered around differential zero
Electrical Characteristics - DIF 0.7V Current Mode Differential Outputs
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
Slew rate
Slew rate matching
Trf
Trf
CONDITIONS
MIN
TYP
MAX
UNITS NOTES
V/ns 1, 2, 3
%
1, 2, 4
Scope averaging on
0.6
2.5
4
9.5
20
Slew rate matching, Scope averaging on
Statistical measurement on single-ended signal
Voltage High
VHigh
660
740
850
1
using oscilloscope math function. (Scope averaging
mV
Voltage Low
VLow
-150
8
150
1
on)
Measurement on single ended signal using absolute
Vmax
760
1150
1
Max Voltage
mV
value. (Scope averaging off)
Vmin
-300
-3
1
Min Voltage
Vswing
Vswing
Scope averaging off
300
1506
mV
1, 2
Vcross_abs
Scope averaging off
250
378
550
mV
1, 5
Crossing Voltage (abs)
-Vcross
Crossing Voltage (var)
Scope averaging off
54
140
mV
1, 6
1
Guaranteed by design and characterization, not 100% tested in production. IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH =
6 x IREF and VOH = 0.7V @ ZO=50Ω (100 differential impedance).
2
Measured from differential waveform
Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window around
differential 0V.
3
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 V_cross_min/max (V_cross absolute)
allowed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.
Electrical Characteristics - Current Consumption
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
Operating Supply Current
Powerdown Current
1
I DD3.3OP
I DD3.3PD
I DD3.3PDZ
CONDITIONS
All outputs active @100MHz, CL = Full load;
All diff pairs driven
All differential pairs tri-stated
MIN
TYP
MAX
134
150
N/A
N/A
UNITS NOTES
mA
mA
mA
1
1
1
Guaranteed by design and characterization, not 100% tested in production.
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
5
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Electrical Characteristics - Output Duty Cycle, Jitter, Skew and PLL Characterisitics
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
PLL Bandwidth
BW
PLL Jitter Peaking
Duty Cycle
Duty Cycle Distortion
2
0.4
t JPEAK
t DC
-3dB point in High BW Mode
-3dB point in Low BW Mode
Peak Pass band Gain
Measured differentially, PLL Mode
45
2.3
0.5
1
48
4
1
2
55
MHz
MHz
dB
%
1
1
1
1
t DCD
Measured differentially, Bypass Mode @100MHz
-2
1
2
%
1,4
Jitter, Cycle to cycle
t jcyc-cyc
Bypass Mode, VT = 50%
Hi BW PLL Mode VT = 50%
VT = 50%
PLL mode
Additive Jitter in Bypass Mode
2500
-250
Skew, Output to Output
t pdBYP
t pdPLL
t sk3
3660
0
15
40
10
4500
250
50
50
50
ps
ps
ps
ps
ps
1
1
1
1,3
1,3
Skew, Input to Output
UNITS NOTES
1
Guaranteed by design and characterization, not 100% tested in production.
I REF = V DD/(3xRR). For RR = 475Ω (1%), I REF = 2.32mA. I OH = 6 x I REF and VOH = 0.7V @ ZO=50Ω.
3
Measured from differential waveform
4
Duty cycle distortion is the difference in duty cycle between the output and the input clock when the device is operated in bypass mode.
2
Electrical Characteristics - PCIe Phase Jitter Parameters
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
Phase Jitter, PLL Mode
SYMBOL
t jphPCIeG1
t jphPCIeG2
t jphPCIeG3
t jphPCIeG1
Additive Phase Jitter,
Bypass Mode
t jphPCIeG2
t jphPCIeG3
CONDITIONS
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
(PLL BW of 2-4MHz, CDR = 10MHz)
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
(PLL BW of 2-4MHz, CDR = 10MHz)
MIN
TYP
32
MAX
86
1.1
3
2.3
3.1
0.5
1
2
5
0.2
0.3
0.8
1
0.1
0.2
UNITS Notes
ps (p-p) 1,2,3
ps
1,2
(rms)
ps
1,2
(rms)
ps
1,2,4
(rms)
ps (p-p)
ps
(rms)
ps
(rms)
ps
(rms)
1,2,3
1,2
1,2
1,2,4
1
Applies to all outputs.
See http://www.pcisig.com for complete specs
3
Sample size of at least 100K cycles. This figures extrapolates to 108ps pk-pk @ 1M cycles for a BER of 1-12.
4
Subject to final radification by PCI SIG.
2
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
6
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
SRC Reference Clock
Common Recommendations for Differential Routing
Dimension or Value
L1 length, route as non-coupled 50ohm trace
0.5 max
L2 length, route as non-coupled 50ohm trace
0.2 max
L3 length, route as non-coupled 50ohm trace
0.2 max
Rs
33
Rt
49.9
Unit
inch
inch
inch
ohm
ohm
Figure
1
1
1
1
1
Down Device Differential Routing
L4 length, route as coupled microstrip 100ohm differential trace 2 min to 16 max
L4 length, route as coupled stripline 100ohm differential trace
1.8 min to 14.4 max
inch
inch
1
1
Differential Routing to PCI Express Connector
L4 length, route as coupled microstrip 100ohm differential trace 0.25 to 14 max
L4 length, route as coupled stripline 100ohm differential trace
0.225 min to 12.6 max
inch
inch
2
2
Figure 1: Down Device Routing
L2
L1
Rs
L4
L4'
L2'
L1'
Rs
HCSL Output Buffer
Rt
Rt
L3'
PCI Express
Down Device
REF_CLK Input
L3
Figure 2: PCI Express Connector Routing
L2
L1
Rs
L4
L4'
L2'
L1'
HCSL Output Buffer
Rs
Rt
Rt
L3'
IDT® Six Output Differential Buffer for PCIe Gen3
PCI Express
Add-in Board
REF_CLK Input
L3
1668F—10/20/16
7
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Alternative Termination for LVDS and other Common Differential Signals (figure 3)
Vdiff
Vp-p
Vcm
R1
R2
R3
R4
Note
0.45v
0.22v
1.08
33
150
100
100
0.58
0.28
0.6
33
78.7
137
100
0.80
0.40
0.6
33
78.7
none
100
ICS874003i-02 input compatible
0.60
0.3
1.2
33
174
140
100
Standard LVDS
R1a = R1b = R1
R2a = R2b = R2
Figure 3
L2
L1
R3
R1a
L4
R4
L4'
L2'
L1'
R1b
HCSL Output Buffer
R2a
R2b
L3'
Down Device
REF_CLK Input
L3
Cable Connected AC Coupled Application (figure 4)
Component
Value
Note
R5a, R5b
8.2K 5%
R6a, R6b
1K 5%
Cc
0.1 µF
Vcm
0.350 volts
Figure 4
3.3 Volts
R5a
R5b
R6a
R6b
Cc
L4
L4'
Cc
IDT® Six Output Differential Buffer for PCIe Gen3
PCIe Device
REF_CLK Input
1668F—10/20/16
8
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
General SMBus serial interface information for the 9DB633
How to Write:
How to Read:
Controller (host) sends a start bit.
Controller (host) sends the write address D4 (H)
ICS clock will acknowledge
Controller (host) sends the begining byte location = N
ICS clock will acknowledge
Controller (host) sends the data byte count = X
ICS clock will acknowledge
Controller (host) starts sending Byte N through
Byte N + X -1
(see Note 2)
• ICS clock will acknowledge each byte one at a time
• Controller (host) sends a Stop bit
•
•
•
•
•
•
•
•
•
•
•
•
Controller (host) will send start bit.
Controller (host) sends the write address D4 (H)
ICS clock will acknowledge
Controller (host) sends the begining byte
location = N
ICS clock will acknowledge
Controller (host) will send a separate start bit.
Controller (host) sends the read address D5 (H)
ICS clock will acknowledge
ICS clock will send the data byte count = X
ICS clock sends Byte N + X -1
ICS clock sends Byte 0 through byte X (if X(H)
was written to byte 8).
Controller (host) will need to acknowledge each byte
Controllor (host) will send a not acknowledge bit
Controller (host) will send a stop bit
•
•
•
•
•
•
•
•
•
•
Index Block Read Operation
Index Block Write Operation
Controlle r (Host)
starT bit
T
Slave A ddress D4(H )
W Rite
WR
Controller (Host)
T
starT bit
Slave Address D4(H)
WR
WRite
ICS (Sla ve /Re ce ive r)
ICS (Slave/Receiver)
ACK
ACK
Beginning Byte = N
Beginning Byte = N
ACK
ACK
Data By te Count = X
RT
Repeat starT
Slave Address D5(H)
RD
ReaD
ACK
Beginning Byte N
ACK
X Byte
ACK
Data Byte Count = X
ACK
Beginning Byte N
Byte N + X - 1
ACK
X Byte
ACK
P
stoP bit
Byte N + X - 1
N
P
IDT® Six Output Differential Buffer for PCIe Gen3
Not acknowledge
stoP bit
1668F—10/20/16
9
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
SMBusTable: Device Control Register, READ/WRITE ADDRESS (D5/D4)
Byte 0
0
1
Default
Pin #
Name
Control Function Type
Enables SMBus
PLL controlled
PLL controlled
1
SW_EN
Control of bits
RW
by SMBus
Bit 7
by device pins
(1:0)
registers
RW
X
RESERVED
Bit 6
RW
X
RESERVED
Bit 5
RW
X
RESERVED
Bit 4
RW
X
RESERVED
Bit 3
RESERVED
RW
X
Bit 2
Selects PLL
PLL BW #adjust
RW
Low BW
High BW
1
Bit 1
Bandwidth
Bypasses PLL for
PLL bypassed PLL enabled
PLL Enable
RW
1
Bit 0
board test
(fan out mode) (ZDB mode)
SMBusTable: Output Enable
Byte 1
Pin #
Bit 7
Bit 6
24,23
Bit 5
Bit 4
18,17
Bit 3
11,12
Bit 2
Bit 1
5,6
Bit 0
Register
Name
Control Function Type
RESERVED
RW
RESERVED
RW
PCIEX5
Output Control
RW
RESERVED
RW
PCIEX3
Output Control
RW
PCIEX2
Output Control
RW
RW
RESERVED
PCIEX0
Output Control
RW
SMBusTable: Function Select Register
Byte 2
Pin #
Name
Control Function Type
RESERVED
RW
Bit 7
RESERVED
RW
Bit 6
RESERVED
RW
Bit 5
RESERVED
RW
Bit 4
RESERVED
RW
Bit 3
RW
RESERVED
Bit 2
RW
RESERVED
Bit 1
RESERVED
RW
Bit 0
SMBusTable: Vendor & Revision ID Register
Byte 3
Pin #
Name
Control Function Type
RID3
R
Bit 7
RID2
R
Bit 6
REVISION ID
RID1
R
Bit 5
RID0
R
Bit 4
VID3
R
Bit 3
VID2
R
Bit 2
VENDOR ID
VID1
R
Bit 1
VID0
R
Bit 0
IDT® Six Output Differential Buffer for PCIe Gen3
0
1
-
Disable
Enable
-
Disable
Disable
Enable
Enable
-
Disable
Enable
0
1
Default
X
X
X
X
X
X
X
X
1
-
Default
0
0
0
1
0
0
0
1
-
0
-
Default
X
X
1
X
1
1
X
1
1668F—10/20/16
10
9DB633
Six Output Differential Buffer for PCIe Gen3
SMBusTable: DEVICE ID
Pin #
Byte 4
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Name
Datasheet
Control Function Type
R
R
R
Device ID
R
= 06 Hex
R
R
R
R
0
1
Default
0
0
0
0
0
1
1
0
-
SMBusTable: Byte Count Register
Byte 5
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
-
Name
Control
Function
Type
0
1
Default
BC7
BC6
BC5
BC4
BC3
BC2
BC1
BC0
Writing to this
register will
configure how
many bytes will be
read back, default
is 06 = 6 bytes.
RW
RW
RW
RW
RW
RW
RW
RW
-
-
0
0
0
0
0
1
1
0
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
11
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
28-pin SSOP Package Drawing and Dimensions
209 mil SSOP
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
N
α
In Millimeters
COMMON DIMENSIONS
MIN
MAX
-2.00
0.05
-1.65
1.85
0.22
0.38
0.09
0.25
SEE VARIATIONS
7.40
8.20
5.00
5.60
0.65 BASIC
0.55
0.95
SEE VARIATIONS
0°
8°
In Inches
COMMON DIMENSIONS
MIN
MAX
-.079
.002
-.065
.073
.009
.015
.0035
.010
SEE VARIATIONS
.291
.323
.197
.220
0.0256 BASIC
.022
.037
SEE VARIATIONS
0°
8°
VARIATIONS
N
28
D mm.
MIN
9.90
D (inch)
MAX
10.50
MIN
.390
MAX
.413
Reference Doc.: JEDEC Publication 95, MO-150
10-0033
209 mil SSOP
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
12
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
28-pin TSSOP Package Drawing and Dimensions
4.40 mm. Body, 0.65 mm. Pitch TSSOP
c
N
(173 mil)
SYMBOL
L
E1
INDEX
AREA
A
A1
A2
b
c
D
E
E1
e
L
N
α
aaa
E
1 2
a
D
In Inches
COMMON DIMENSIONS
MIN
MAX
-.047
.002
.006
.032
.041
.007
.012
.0035
.008
SEE VARIATIONS
0.252 BASIC
.169
.177
0.0256 BASIC
.018
.030
SEE VARIATIONS
0°
8°
-.004
VARIATIONS
A
A2
(25.6 mil)
In Millimeters
COMMON DIMENSIONS
MIN
MAX
-1.20
0.05
0.15
0.80
1.05
0.19
0.30
0.09
0.20
SEE VARIATIONS
6.40 BASIC
4.30
4.50
0.65 BASIC
0.45
0.75
SEE VARIATIONS
0°
8°
-0.10
N
A1
28
D mm.
MIN
9.60
D (inch)
MAX
9.80
MIN
.378
MAX
.386
-CReference Doc.: JEDEC Publication 95, MO-153
e
SEATING
PLANE
b
10-0035
aaa C
Ordering Information
Part / Order Number Shipping Packaging
9DB633AFLF
Tubes
9DB633AFLFT
Tape and Reel
9DB633AFILF
Tubes
9DB633AFILFT
Tape and Reel
9DB633AGLF
Tubes
9DB633AGLFT
Tape and Reel
9DB633AGILF
Tubes
9DB633AGILFT
Tape and Reel
Package
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin TSSOP
28-pin TSSOP
28-pin TSSOP
28-pin TSSOP
Temperature
0 to +70°C
0 to +70°C
-40 to +85°C
-40 to +85°C
0 to +70°C
0 to +70°C
-40 to +85°C
-40 to +85°C
"LF" after the package code are the Pb-Free configuration and are RoHS compliant.
"A" is the device revision designator (will not correlate to the datasheet revision).
IDT® Six Output Differential Buffer for PCIe Gen3
1668F—10/20/16
13
9DB633
Six Output Differential Buffer for PCIe Gen3
Datasheet
Revision History
Rev.
A
B
C
Originator Issue Date
RDW
6/30/2010
RDW
7/12/2010
RDW
4/20/2011
D
E
RDW
RDW
F
RDW
Description
Released to final
Changed "PWD" to "Default" in SMBus Register descriptions
Changed pull down indicator from '**' to 'v'.
Corrected typo for 28SSOP T&R orderable part number; "I" and "L" were
10/22/2013 swapped.
2/19/2014 Corrected typo for Read/Write address from D4/D5 to D5/D4 respectively
Updated input clock electrical table to latest format. No change to form, fit or
10/20/2016
function of the device
Page #
10,11
13
9,10
5
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