DS125BR800 Datasheet, PDF (7/59 Pages) Texas Instruments – Low-Power 12.5-Gbps 8-Channel Repeater With Input Equalization and Output De-Emphasis

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7.5 Electrical Characteristics^(1)(2)(3)
PARAMETER
POWER
PD
Power Dissipation
LVCMOS / LVTTL DC SPECIFICATIONS
V_IH25
V_IH33
V_IL
V_OH
High Level Input Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
(ALL_DONE pin)
V_OL
Low Level Output Voltage
(ALL_DONE pin)
I_IH
Input High Current (PWDN pin)
Input High Current with internal
resistors (4-level input pin)
I_IL
Input Low Current (PWDN pin)
Input Low Current with internal
resistors (4-level input pin)
CML RECEIVER INPUTS (IN_n+, IN_n-)
RL_RX-DIFF
RX Differential return loss
RL_RX-CM
Z_RX-DC
Z_RX-DIFF-DC
V_RX-DIFF-DC
RX Common mode return loss
RX DC common mode impedance
RX DC differential mode impedance
Differential RX peak to peak voltage
(VID)
V_{RX-SIGNAL-DET-} Signal detect assert level for active
DIFF-PP
data signal
V_RX-IDLE-DET-
DIFF-PP
Signal detect de-assert level for
electrical idle
HIGH SPEED OUTPUTS
V_TX-DIFF-PP
Output Voltage Differential Swing
V_TX-DE-
RATIO_3.5
TX de-emphasis ratio
DS125BR800
SNLS426E – AUGUST 2012 – REVISED JANUARY 2015
TEST CONDITIONS
VDD = 2.5-V supply,
EQ Enabled,
VOD = 1.0 Vp-p,
RXDET = 1, PWDN = 0
VIN = 3.3-V supply,
EQ Enabled,
VOD = 1.0 Vp-p,
RXDET = 1, PWDN = 0
2.5 V-Mode
3.3 V-Mode
I_oh= –4 mA
I_ol= 4 mA
VIN = 3.6 V, LVCMOS = 3.6 V
VIN = 3.6 V, LVCMOS = 0 V
MIN TYP MAX UNIT
500 700 mW
660 900 mW
2.0
2.0
0
2.0
–15
20
–15
–160
VDD V
VIN V
0.8 V
V
0.4 V
15 µA
150 µA
15 µA
–40 µA
0.05 - 7.5 GHz
7.5 - 15 GHz
0.05 - 5 GHz
Tested at VDD = 2.5 V
Tested at VDD = 2.5 V
Tested at pins
SD_TH = float,
0101 pattern at 8 Gbps
SD_TH = float,
0101 pattern at 8 Gbps
–15
dB
-5
dB
–10
dB
40 50 60 Ω
80 100 120 Ω
1.2 V
180
mVp-p
110
mVp-p
Differential measurement with OUT_n+ and OUT_n-,
terminated by 50 Ω to GND,
AC-Coupled, VID = 1.0 Vp-p,
DEM0 = 1, DEM1 = 0⁽⁴⁾
VOD = 1.0 Vp-p,
DEM0 = 0, DEM1 = R
PCIe Gen-1 or PCIe Gen-2 and SAS/SATA (up to 6
Gbps)
0.8 1.0
–3.5
1.2 Vp-p
dB
(1) Typical values represent most likely parametric norms at VDD = 2.5 V, TA = 25°C., and at the Recommended Operating Conditions at
the time of product characterization and are not guaranteed.
(2) The Electrical Characteristics tables list specified specifications under the listed Recommended Operating Conditions except as
otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and
are not guaranteed.
(3) Specified by device characterization.
(4) In PCIe Gen-3 mode, the output VOD level is not fixed. It will be adjusted automatically based on the VID input amplitude level. The
output VOD level set by DEMA/B[1:0] in this MODE is dependent on the VID level and the frequency content. The DS125BR800
repeater is designed to be non-limiting in this MODE, so the TX-FIR (de-emphasis) is passed to the RX to support the handshake
negotiation link training.
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