DS1878T+T&R Maxim Integrated Products, DS1878T+T&R Datasheet - Page 74

• Manufacturer Part Number: DS1878T+T&R
• Description: IC CTLR SFP W/DGTL LDD RX 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: SFP+ Controllerr

Specifications of DS1878T+T&R

• Input Type: *
• Output Type: *
• Interface: *
• Current - Supply: *
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SFP+ Controller with Digital LDD Interface
Table 02h, Register BEh: HLOS
Table 02h, Register BFh: LLOS
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BEh
BFh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
Fast-comparison DAC threshold adjust for high LOS. The combination of HLOS and LLOS creates a hysteresis
comparator. As RSSI falls below the LLOS threshold, the LOS LO alarm bit is set to 1. The LOS alarm remains set
until the RSSI input is found above the HLOS threshold setting, which clears the LOS LO alarm bit and sets the
LOS HI alarm bit. At power-on, both LOS LO and LOS HI alarm bits are 0 and the hysteresis comparator uses the
LLOS threshold setting.
Fast-comparison DAC threshold adjust for low LOS. See HLOS (Table 02h, Register BEh) for functional description.
BIT 7
BIT 7
2
2
7
7
2
2
6
6
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
2
2
5
5
2
2
4
4
2
2
3
3
2
2
2
2
2
2
1
1
BIT 0
BIT 0
2
2
0
0