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PDF 9DBU0241 Data sheet ( Hoja de datos )

Número de pieza 9DBU0241
Descripción 2 O/P 1.5V PCIe Gen1-2-3 ZDB/FOB
Fabricantes IDT 
Logotipo IDT Logotipo



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2 O/P 1.5V PCIe Gen1-2-3 ZDB/FOB
w/Zo=100ohms
9DBU0241
DATASHEET
Description
The 9DBU0241 is a member of IDT's 1.5V Ultra-Low-Power
(ULP) PCIe family. It has integrated output terminations
providing Zo=100ohms for direct connection to 100ohm
transmission lines. The device has 2 output enables for clock
management.
Recommended Application
1.5V PCIe Gen1-2-3 Zero-Delay/Fan-out Buffer (ZDB/FOB)
Output Features
2 – 1-167MHz Low-Power (LP) HCSL DIF pairs
w/ZO=100
Key Specifications
DIF cycle-to-cycle jitter <50ps
DIF output-to-output skew <50ps
DIF phase jitter is PCIe Gen1-2-3 compliant
DIF bypass mode additive phase jitter is <300fs rms for
PCIe Gen3
DIF bypass mode additive phase jitter <350fs rms for
12k-20MHz
Block Diagram
Features/Benefits
Direct connection to 100transmission lines; saves 8
resistors compared to standard HCSL outputs
35mW typical power consumption in PLL mode; eliminates
thermal concerns
Spread Spectrum (SS) compatible; allows SS for EMI
reduction
OE# pins; 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
Pin/SMBus selectable PLL bandwidth and PLL Bypass;
optimize PLL to application
Outputs blocked until PLL is locked; clean system start-up
Device contains default configuration; SMBus interface not
required for device control
3.3V tolerant SMBus interface works with legacy controllers
Space saving 24-pin 4x4mm VFQFPN; minimal board
space
vOE(1:0)#
2
CLK_IN
CLK_IN#
SS-
Compatible
PLL
DIF1
DIF0
^vHIBW_BYPM_LOBW#
^CKPWRGD_PD#
SDATA_3.3
SCLK_3.3
CONTROL
LOGIC
9DBU0241 REVISION C 04/22/15 1 ©2015 Integrated Device Technology, Inc.

1 page




9DBU0241 pdf
9DBU0241 DATASHEET
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the 9DBU0241. 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
VDDx
Input Voltage
VIN
Input High Voltage, SMBus VIHSMB
SMBus clock and data pins
Storage Temperature
Ts
Junction Temperature
Tj
Input ESD protection
ESD prot
Human Body Model
1Guaranteed 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.
MIN
-0.5
-0.5
-65
2000
TYP
MAX
2
VDD+0.5
3.3
150
125
UNITS NOTES
V 1,2
V 1,3
V1
°C 1
°C 1
V1
Electrical Characteristics–Clock Input Parameters
TA = TAMB, Supply Voltages per normal operation conditions, See Test Loads for Loading Conditions
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Common Mode
Voltage - DIF_IN
VCOM
Common Mode Input Voltage
200
Input Swing - DIF_IN
Input Slew Rate - DIF_IN
VSWING
dv/dt
Differential value
Measured differentially
300
0.4
Input Leakage Current
IIN
VIN = VDD , VIN = GND
Input Duty Cycle dtin Measurement from differential wavefrom
Input Jitter - Cycle to Cycle JDIFIn
Differential Measurement
1 Guaranteed by design and characterization, not 100% tested in production.
2 Slew rate measured through +/-75mV window centered around differential zero
-5
45
0
TYP
50
MAX
725
1450
8
5
55
150
UNITS NOTES
mV 1
mV
V/ns
uA
%
ps
1
1,2
1
1
REVISION C 04/22/15
5 2 O/P 1.5V PCIE GEN1-2-3 ZDB/FOB W/ZO=100OHMS

5 Page





9DBU0241 arduino
9DBU0241 DATASHEET
SMBus Table: Output Enable Register 1
Byte 0
Name
Control Function
Type
0
Bit 7
Reserved
Bit 6
Reserved
Bit 5
DIF OE1
Output Enable
RW Low/Low
Bit 4
Reserved
Bit 3
DIF OE0
Output Enable
RW Low/Low
Bit 2
Reserved
Bit 1
Reserved
Bit 0
Reserved
1. A low on these bits will overide the OE# pin and force the differential output Low/Low
1
Enabled
Enabled
Default
1
1
1
1
1
1
1
1
SMBus Table: PLL Operating Mode and Output Amplitude Control Register
Byte 1
Bit 7
Bit 6
Bit 5
Name
PLLMODERB1
PLLMODERB0
PLLMODE_SWCNTRL
Control Function
PLL Mode Readback Bit 1
PLL Mode Readback Bit 0
Type
R
R
Enable SW control of PLL Mode RW
01
See PLL Operating Mode Table
Values in B1[7:6] Values in B1[4:3]
set PLL Mode
set PLL Mode
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PLLMODE1
PLLMODE0
AMPLITUDE 1
AMPLITUDE 0
PLL Mode Control Bit 1
PLL Mode Control Bit 0
Reserved
Controls Output Amplitude
RW1
RW1
RW
RW
See PLL Operating Mode Table
00 = 0.55V
10= 0.75V
01 = 0.65V
11 = 0.85V
1. B1[5] must be set to a 1 for these bits to have any effect on the part.
Default
Latch
Latch
0
0
0
1
1
0
SMBus Table: DIF Slew Rate Control Register
Byte 2
Name
Control Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SLEWRATESEL DIF1
SLEWRATESEL DIF0
Reserved
Reserved
Slew Rate Selection
Reserved
Slew Rate Selection
Reserved
Reserved
Reserved
Type
RW
RW
0
Slow Setting
Slow Setting
1
Fast Setting
Fast Setting
Default
1
1
1
1
1
1
1
1
SMBus Table: FB Slew Rate Control Register
Byte 3
Bit 7
Bit 6
Bit 5
Bit 4
Name
Control Function
Reserved
Reserved
Reserved
Reserved
Bit 3
Bit 2
Bit 1
Bit 0
SLEWRATESEL FB
Reserved
Reserved
Reserved
Adjust Slew Rate of FB
Type
RW
0
Slow Setting
1
Fast Setting
Default
1
1
0
0
0
1
1
1
Byte 4 is Reserved and reads back 'hFF
REVISION C 04/22/15
11 2 O/P 1.5V PCIE GEN1-2-3 ZDB/FOB W/ZO=100OHMS

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