HD I/O Supported Standards

UltraScale Architecture SelectIO Resources User Guide (UG571)

Document ID
UG571
Release Date
2022-08-31
Revision
1.14 English

The SelectIO pins can be configured to various I/O standards.

Single-ended I/O standards (LVTTL and LVCMOS)

Voltage-referenced I/O standards (SSTL, HSTL, and HSUL)

Pseudo-differential I/O standards (differential SSTL and differential HSTL)

True-differential inputs (LVDS, LVPECL)

Table: HD I/O Supported Standards lists the HD I/O supported standards with their respective features.

Table 3-2:      HD I/O Supported Standards

I/O Standard

Driver Features

Receiver Features

DRIVE

SLEW

ODT

LVCMOS12(1)(2)

4, 8, 12

SLOW, FAST

LVCMOS15(1)(2)

4, 8, 12, 16

SLOW, FAST

LVCMOS18(1)(2)

4, 8, 12, 16

SLOW, FAST

LVCMOS25(1)(2)

4, 8, 12, 16

SLOW, FAST

LVCMOS33(1)(2)

4, 8, 12, 16

SLOW, FAST

LVTTL(1)(2)

4, 8, 12, 16

SLOW, FAST

HSUL_12(1)

SLOW, FAST

HSTL_I(1)

SLOW, FAST

RTT_48

HSTL_I_18(1)

SLOW, FAST

RTT_48

SSTL18_I(1)

SLOW, FAST

RTT_48

SSTL18_II(1)

SLOW, FAST

RTT_48

SSTL15(1)

SLOW, FAST

RTT_48

SSTL15_II(1)

SLOW, FAST

RTT_48

SSTL135(1)

SLOW, FAST

RTT_48

SSTL135_II(1)

SLOW, FAST

RTT_48

SSTL12(1)

SLOW, FAST

RTT_48

DIFF_HSTL_I(1)

SLOW, FAST

RTT_48

DIFF_HSTL_I_18(1)

SLOW, FAST

RTT_48

DIFF_SSTL18_I(1)

SLOW, FAST

RTT_48

DIFF_SSTL18_II(1)

SLOW, FAST

RTT_48

DIFF_SSTL15(1)

SLOW, FAST

RTT_48

DIFF_SSTL15_II(1)

SLOW, FAST

RTT_48

DIFF_SSTL135(1)

SLOW, FAST

RTT_48

DIFF_SSTL135_II(1)

SLOW, FAST

RTT_48

DIFF_SSTL12(1)

SLOW, FAST

RTT_48

DIFF_HSUL_12

SLOW, FAST

LVPECL (receiver only)(1)

N/A

N/A

LVDS_25 (receiver only)(1)(3)

N/A

N/A

SUB_LVDS (receiver only)(1)

N/A

N/A

SLVS_400_25 (receiver only)(1)

N/A

N/A

Notes:

1.Maximum frequency of operation is 250 Mb/s DDR.

2.For 4 mA drive strength, the maximum frequency of operation is limited to 125 Mb/s.

3.There is not a specific requirement on the VCCO bank voltage on LVDS_25 inputs provided the VCCO level is high enough to ensure the pin voltage aligns to the Vin spec in the Recommended Operating Conditions table of the specific UltraScale+ device data sheet [Ref 2].