DATASHEET
9DBV0841 APRIL 28, 2016 1 ©2016 Integrated Device Technology, Inc.
8-output 1.8V PCIe Gen1-3
Zero-Delay/Fan-out Buffer w/Zo=100ohms
9DBV0841
Description
The 9DBV0841 is a 1.8V member of IDT's full featured PCIe
family. It has integrated output terminations providing
Zo=100 for direct connection for 100 transmission lines.
The device has 8 output enables for clock management and 3
selectable SMBus addresses.
Recommended Application
SSD, microServers, WLAN Access points
Output Features
8 – 1-200Hz Low-Power (LP) HCSL DIF pairs
Key Specifications
DIF cycle-to-cycle jitter <50ps
DIF output-to-output skew <50ps
DIF additive phase jitter is <100fs rms for PCIe Gen3
DIF additive phase jitter <300fs rms for 12k-20MHz
Features/Benefits
LP-HCSL outputs save 32 resistors; minimal board space
and BOM cost
62mW typical power consumption in PLL mode; eliminates
thermal concerns
Spread Spectrum (SS) compatible; allows use of SS for
EMI reduction
OE# pins; support DIF power management
HCSL compatible differential input; can be driven by
common clock sources
Programmable Slew rate for each output; allows tuning for
various line lengths
Programmable output amplitude; allows tuning for various
application environments
Pin/software selectable PLL bandwidth and PLL Bypass;
minimize phase jitter for each application
Outputs blocked until PLL is locked; clean system start-up
Software selectable 50MHz or 125MHz PLL operation;
useful for Ethernet applications
Configuration can be accomplished with strapping pins;
SMBus interface not required for device control
3.3V tolerant SMBus interface works with legacy controllers
Space saving 48-pin 6x6mm VFQFPN; minimal board
space
Selectable SMBus addresses; multiple devices can easily
share an SMBus segment
Block Diagram
^vHIBW_BYPM_LOBW#
^CKPWRGD_PD#
SDATA_3.3
vOE(7:0)#
SCLK_3.3
vSADR
DIF0
DIF1
DIF2
DIF3
DIF4
DIF5
DIF6
DIF7
CLK_IN
C
L
K
_
I
N
#
8
SS
Compatible
PLL
Control
Logic
8-OUTPUT 1.8V PCIE GEN1-3 ZERO-DELAY/FAN-OUT BUFFER W/ZO=100OHMS 2 APRIL 28, 2016
9DBV0841 DATASHEET
Pin Configuration
SMBus Address Selection Table
Power Management Table
Power Connections Frequency Select Table
PLL Operating Mode
^CKPWRGD_PD#
VDDIO
vOE7#
DIF7#
DIF7
vOE6#
DIF6#
DIF6
GND
VDDIO
VDD1.8
vOE5#
48 47 46 45 44 43 42 41 40 39 38 37
vSADR_tri 1 36 DIF5#
^vHIBW_BYPM_LOBW# 2 35 DIF5
FB_DNC 3 34 vOE4#
FB_DNC# 4 33 DIF4#
VDDR1.8 5 32 DIF4
CLK_IN 6 31 VDDIO
CLK_IN# 7 30 VDDA1.8
GNDR 8 29 GNDA
GNDDIG 9 28 vOE3#
SCLK_3.3 10 27 DIF3#
SDATA_3.3 11 26 DIF3
VDDDIG1.8 12 25 vOE2#
13 14 15 16 17 18 19 20 21 22 23 24
VDDIO
vOE0#
DIF0
DIF0#
vOE1#
DIF1
DIF1#
VDD1.8
VDDIO
GND
DIF2
DIF2#
^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
48-pin VFQFPN, 6x6 mm, 0.4mm pitch
9DBV0841
EPAD should be
connected to GND
SADR Address
0 1101011
M 1101100
1 1101101
x
x
x
State of SADR on first application of
CKPWRGD_PD#
+ Read/Write bit
True O/P Comp. O/P
0 X X X Low Low Off
1 Running 0 X Low Low
On
1
1 Running 1 0 Running Running
On
1
1 Running 1 1 Low Low
On
1
OEx# Pin PLL
DIFx
CKPWRGD_PD#
SMBus
OEx bit
1. If Bypass mode is selected, the PLL will be off, and outputs will be running.
CLK_IN
Pin Number
VDD VDDIO GND
58
Input
receiver
analo
g
12 9 Digital Power
20, 31, 38
13, 21, 31,
39, 47
22, 29, 40 DIF outputs
30 29 PLL Analog
Description
FSEL
B
y
te3
[
4:3
]
CLK_IN
MHz
DIFx
MHz
00 (Default)
100.00 CLK_IN
01 50.00 CLK_IN
10 125.00 CLK_IN
11 Reserved Reserved
HiBW_BypM_LoBW# MODE
Byte1 [7:6]
Readback
Byte1 [4:3]
Control
0 PLL Lo BW 00 00
MBypass0101
1 PLL Hi BW 11 11
APRIL 28, 2016 3 8-OUTPUT 1.8V PCIE GEN1-3 ZERO-DELAY/FAN-OUT BUFFER W/ZO=100OHMS
9DBV0841 DATASHEET
Pin Descriptions
PIN # PIN NAME TYPE DESCRIPTION
1 vSADR_tri
LATCHED
IN
Tri-level latch to select SMBus Address. See SMBus Address Selection Table.
2
^
vHIBW_BYPM_LOBW
#
LATCHED
IN
Trilevel input to select High BW, Bypass or Low BW mode.
See PLL Operating Mode Table for Details.
3 FB_DNC DNC
True clock of differential feedback. The feedback output and feedback input are
connected internally on this pin. Do not connect anything to this pin.
4 FB_DNC# DNC
Complement clock of differential feedback. The feedback output and feedback
input are connected internally on this pin. Do not connect anything to this pin.
5 VDDR1.8 PWR
1.8V power for differential input clock (receiver). This VDD should be treated as
an Analog power rail and filtered appropriately.
6 CLK_IN IN True Input for differential reference clock.
7 CLK_IN# IN Complementary Input for differential reference clock.
8 GNDR GND Analog Ground pin for the differential input (receiver)
9 GNDDIG GND Ground pin for digital circuitry
10 SCLK_3.3 IN Clock pin of SMBus circuitry, 3.3V tolerant.
11 SDATA_3.3 I/O Data pin for SMBus circuitry, 3.3V tolerant.
12 VDDDIG1.8 PWR 1.8V digital power (dirty power)
13 VDDIO PWR Power supply for differential outputs
14 vOE0# IN
Active low input for enabling DIF pair 0. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
15 DIF0 OUT Differential true clock output
16 DIF0# OUT Differential Complementary clock output
17 vOE1# IN
Active low input for enabling DIF pair 1. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
18 DIF1 OUT Differential true clock output
19 DIF1# OUT Differential Complementary clock output
20 VDD1.8 PWR Power supply, nominal 1.8V
21 VDDIO PWR Power supply for differential outputs
22 GND GND Ground pin.
23 DIF2 OUT Differential true clock output
24 DIF2# OUT Differential Complementary clock output
25 vOE2# IN
Active low input for enabling DIF pair 2. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
26 DIF3 OUT Differential true clock output
27 DIF3# OUT Differential Complementary clock output
28 vOE3# IN
Active low input for enabling DIF pair 3. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
29 GNDA GND Ground pin for the PLL core.
30 VDDA1.8 PWR 1.8V power for the PLL core.
31 VDDIO PWR Power supply for differential outputs
32 DIF4 OUT Differential true clock output
33 DIF4# OUT Differential Complementary clock output
34 vOE4# IN
Active low input for enabling DIF pair 4. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
35 DIF5 OUT Differential true clock output
36 DIF5# OUT Differential Complementary clock output
37 vOE5# IN
Active low input for enabling DIF pair 5. This pin has an internal pull-down.
1 =disable outputs, 0 = enable outputs
38 VDD1.8 PWR Power supply, nominal 1.8V

9DBV0841AKLFT

Mfr. #:
Manufacturer:
IDT
Description:
Clock Buffer VERY LOW POWER PCIE GEN1-2-3 BUFFER
Lifecycle:
New from this manufacturer.
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