Published SFF-8436 Rev 4.1
QSFP+ 10 Gbs 4X Pluggable Transceiver Page 3
Changed from 'The electrical and optical specifications shall be compatible with….'
to 'The electrical and optical specifications may be compatible with …..'
Section 3 page 10 line 19: Add: ‘"For speeds above 6Gb/s the compliance board methodology
of IEEE802.3ba, FC-PI4 and SFF8431 should be used. Measurements taken with QSFP+
compliance boards should be corrected for any difference between the loss of these
compliance boards and the loss of the compliance boards specified in the standard.’
Section 4:
4.1.1.2: changed 'post' to 'asserting "low"’
4.1.1.5: Added the following text: 'The INTL pin is deasserted “High” when byte 2 bit 0
(Data Not Ready)is read unless a flag is set (see 7.6.1.2).'
4.1.3.1: Changed 'Clause 6.6.5.2' to 'Clause 7.6.5.2'
4.1.3.2: Changed " For operation above 6Gbps see the appropriate specification for
required voltage swings. Note: for 10G Ethernet reference SFF-8431. For 40G Ethernet
operation reference 802.3ba." to "For operation above 6 GBd see the appropriate
specification, e.g. 802.3ba, FC-PI-4, FC-PI-5 or the InfiniBand specification. For 10G
Ethernet, see SFF-8431."
Deleted ‘(absolute value)’ after ‘1600mv’.
4.2.1: Change "… filtering shown in Figure 4", to "… filtering equivalent to that shown
in Figure 4".
4.2.1: In Table 6, added a reference to Figure 5 in the Condiltion column for Sustained
peak current at hot plug ... & Module Maximum Current Inrush ....
4.2.1: At line 9, add a sentence "It is recommended that the 22 uF capacitors each have
an equivalent series resistance of 0.22 ohm."
Section 5:
5.1: Updated the two bottom images to show the same keying structure as the two top
images (modules).
5.3: Enlarged the scale of Fig. 8 to make it easier to read the dimensions and notes.
Figure 8: Added missing dimensions at the bottom of figure.
5.3.1: Figure 10: Change pad width from ‘0.60 +/-0.03’ to ‘0.55 -0, +0.08’
Figure 10 detail 2: Change the tolerances from ‘0.08 +/- 0.015’ to ‘0.10 +/-0.05’.
Figure 14: Deleted the MX1 product code
Figure 17A and 17B: Changed the dimension in section Y-Y from ‘.2mm’ to ‘2.0 mm’.
5.10: Updated IEC-xxx reference to IEC 61754-20. Updated TIA reference for dual LC to
TIA/EIA-604-10A.
Section 7:
7.1:Added the following text: 'This QSFP+ specification is based on the INF8438
specification however it is not backward compatible. Address 128 Page00 is used to
indicate the use of the QSFP+ memory map rather than the QSFP memory map.'
7.2.1: Changed reference from ‘clause 3.1.2’ to ‘clause 4.1.2’.
7.4: Changed reference from ‘clause 6.6’ to ‘clause 7.6’ ; changed reference from ‘clause
3.1.1.1’ to ‘clause 4.1.1.1’ ; changed reference from ‘clause 3.1.2’ to ‘clause 4.1.2’.
7.6: Changed the last byte designation in page 00 from ‘126’ to ‘128’
7.6: Changed ‘Page 03 is required if byte 2, bit 2 in the lower page is set high’ to
‘Page 03 is required if byte 2, bit 2 in the lower page is low.’
7.6.1: Consolidated 3 columns in tables 17-47: single column now reads: Passive copper,
active copper and active optical.
7.6.1.2: Added: 'These flags may be masked. (See 7.6.1.6) '
7.6.1.4: Changed reference from ‘clause 6.6.1.3’ to ‘clause 7.6.1.3’
Table 24: Address 88: changed ‘RX’ to ‘TX’
7.6.2 Table 29: Added to byte 146 "Link length supported for 50/125 um fiber (OM4), units
of 2 m) when Byte 147 declares 850 nm VCSEL as defined in Table 37."
Table 38: Changed reserved bytes from ‘7-4 to ‘7-5’. Added 'Reserved for' in front of FDR
for bit 3 and in front of EDR for bit 4
Table 41: Address 220 changed from ‘FEC BER’ to ‘reserved’
Table 43: Added references to table 44.
Table 45: For Address 226 - 239, in the Description column, changed the entry (2 Bytes)
to (14 Bytes).
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