NB3M8T3910_16 Datasheet, PDF (1/20 Pages) ON Semiconductor – Configurable Differential Clock Fanout Buffer

NB3M8T3910G
2.5V/3.3V 3:1:10
Configurable Differential
Clock Fanout Buffer with
LVCMOS Reference Output
Description
The NB3M8T3910G is a 3:1:10 Clock fanout buffer operating on a
2.5 V/3.3 V Core V_DD and a flexible 2.5 V / 3.3 V V_DDO supply
(V_DDO ≤ V_DD).
A 3:1 MUX selects between Crystal oscillator inputs, or either of
two differential Clock inputs capable of accepting LVPECL, LVDS,
HCSL, or SSTL levels. The MUX select lines, SEL0 and SEL1, accept
LVCMOS or LVTTL levels and select input per Table 3. The Crystal
input is disabled when a Clock input is selected.
Differential Outputs consist of two banks of five differential outputs
with each bank independently mode configurable as LVPECL, LVDS
or HCSL. Each bank of differential output pairs is configured with a
pair of SMODEAx/Bx select lines using LVCMOS or LVTTL levels
per Table 6. Clock input levels and outputs states are determined per
Table 5.
The Single−Ended LVCMOS Output, REFOUT, is synchronously
enabled by the OE_SE control line per Table 4 using LVCMOS /
LVTTL levels. For Clock frequencies above 250 MHz, the REFOUT
line should be disabled.
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MARKING
DIAGRAM
1
1 48
QFN48
G SUFFIX
CASE 485AJ
NB3M8T
3910G
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 19 of
this data sheet.
Features
• Crystal, Single−Ended or Differential Input Reference
Clocks
• Differential Input Pair can Accept: LVPECL, LVDS,
HCSL, SSTL
• Two Output Banks: Each has Five Differential Outputs
Configurable as LVPECL, LVDS, or HCSL by
SMODEAx/Bx Pins
• One Single−Ended LVCMOS Output with Synchronous
OE Control
• LVCMOS/LVTTL Interface Levels for all Control
Inputs
• Clock Frequency: Up to 1400 MHz, Typical
• Output Skew: 50 ps (Max)
• Additive RMS Jitter <0.03 ps (156.25 MHz, Typical)
• Input to Output Propagation Delay (900 ps Typical)
• Operating Supply Modes V_DD/V_DDO: 2.5 V/2.5 V,
3.3 V/3.3 V or 3.3 V/2.5 V
• Industrial Temperature Range −40°C to 85°C
• This is a Pb−Free Device
Applications
• Clock Distribution
• Telecom
• Networking
• Backplane
• High End Computing
• Wireless and Wired Infrastructure
End Products
• Servers
• Ethernet Switch/Routers
• ATE
• Test and Measurement
© Semiconductor Components Industries, LLC, 2016
1
March, 2016 − Rev. 2
Publication Order Number:
NB3M8T3910/D