Specification	DS125BR820NJYT

Applications	PCIe, SATA, SAS
Current - Supply	220 mA
Data Rate (Max)	12.5 Gbps
Delay Time	80 ps
Input	CML
Mounting Type	Surface Mount
Number of Channels	8
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output	CML
Package / Case	54-WFQFN Exposed Pad
Signal Conditioning	Input Equalization, Output De-Emphasis
Supplier Device Package	54-WQFN (10x5.5)
Type	ReDriver, Buffer
Voltage - Supply [Max]	3.3 V
Voltage - Supply [Min]	2.5 V

DS125BR820 Series

12-Gbps 8-channel linear redriver with equalization

Part	Type	Number of Channels	Delay Time	Applications	Output	Package / Case	Data Rate (Max)	Voltage - Supply [Max]	Voltage - Supply [Min]	Signal Conditioning	Current - Supply	Input	Mounting Type	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments DS125BR820NJYR	Buffer ReDriver	8	80 ps	PCIe SAS SATA	CML	54-WFQFN Exposed Pad	12.5 Gbps	3.3 V	2.5 V	Input Equalization Output De-Emphasis	220 mA	CML	Surface Mount	54-WQFN (10x5.5)	85 °C	-40 °C
Texas Instruments DS125BR820NJYT	Buffer ReDriver	8	80 ps	PCIe SAS SATA	CML	54-WFQFN Exposed Pad	12.5 Gbps	3.3 V	2.5 V	Input Equalization Output De-Emphasis	220 mA	CML	Surface Mount	54-WQFN (10x5.5)	85 °C	-40 °C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 19.04
		10	$ 17.50
		25	$ 16.77
		100	$ 14.78
	Digi-Reel®	1	$ 19.04
		10	$ 17.50
		25	$ 16.77
		100	$ 14.78
	Tape & Reel (TR)	250	$ 14.05
		500	$ 13.15
Texas Instruments	SMALL T&R	1	$ 14.90
		100	$ 13.02
		250	$ 10.04
		1000	$ 8.98

Description

General part information

DS125BR820 Series

The DS125BR820 is an extremely low-power high-performance repeater/redriver designed to support eight channels carrying high speed interface up to 12.5 Gbps, such as 40G-CR4, 40G-KR4, SAS/SATA, and PCIe. The receiver’s continuous time linear equalizer (CTLE) provides high frequency boost that is programmable from 3 to 10 dB at 6 GHz (12 Gbps) followed by a linear output driver. The CTLE receiver is capable of opening an input eye that is completely closed due to inter symbol interference (ISI) induced by interconnect medium such as board traces or twin axial-copper cables. The programmable equalization maximizes the flexibility of physical placement within the interconnect channel and improves overall channel performance.

When operating in 40G-CR4/KR4, SAS/SATA, and PCIe applications, the DS125BR820 preserves transmit signal characteristics, thereby allowing the host controller and the end point to negotiate transmit equalizer coefficients. This transparency in the link training protocol facilitates system level interoperability and minimizes latency.

The programmable settings can be applied easily via pin control, software (SMBus or I2C), or direct loading from an external EEPROM. In EEPROM mode, the configuration information is automatically loaded on power up, thereby eliminating the need for an external microprocessor or software driver.