DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 216

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

6–44
Stratix IV Device Handbook Volume 1
Differential LVPECL
In Stratix IV devices, the LVPECL I/O standard is supported on input clock pins on
column and row I/O banks. LVPECL output operation is not supported in Stratix IV
devices. LVDS input buffers are used to support LVPECL input operation. AC
coupling is required when the LVPECL common-mode voltage of the output buffer is
higher than the LVPECL input common-mode voltage.
AC-coupled termination scheme. The 50-
external to the device.
Figure 6–32. LVPECL AC-Coupled Termination
Note to
(1) The LVPECL AC-coupled termination is applicable only when you use an Altera FPGA LVPECL transmitter.
DC-coupled LVPECL is supported if the LVPECL output common mode voltage is
within the Stratix IV LVPECL input buffer specification
Figure 6–33. LVPECL DC-Coupled Termination
Note to
(1) The LVPECL DC-coupled termination is applicable only when you use an Altera FPGA LVPECL transmitter.
Figure
Figure
LVPECL Output Buffer
LVPECL Output Buffer
6–32:
6–33:
Altera FPGA
Altera FPGA
0.1 μF
0.1 μF
Z
Z
Z
Z
O
O
O
O
= 50 Ω
= 50 Ω
= 50 Ω
= 50 Ω
Ω
(Note 1)
(Note 1)
resistors used at the receiver end are
V
ICM
100 Ω
Chapter 6: I/O Features in Stratix IV Devices
Figure 6–32
(Figure
50 Ω
50 Ω
Termination Schemes for I/O Standards
Stratix IV LVPECL
February 2011 Altera Corporation
Stratix IV LVPECL
Input Buffer
6–33).
Input Buffer
shows the