over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
RXTF
Rx receive falling input threshold Port configured as Sink 240 250 260 mV
V
RXTF
Rx receive falling input threshold Port configured as Source 576 600 624 mV
NCOUNT
Number of transitions for signal
detection (number to count to
detect non-idle bus).
3
TTRANWIN
Time window for detecting non-idle
bus.
12 20 µs
ZBMCRX Receiver input impedance
Does not include pull-up or pulldown
resistance from cable detect.
Transmitter is Hi-Z.
5
MΩ
TRXFILTER
(4)
Rx bandwidth limiting filter. Time
constant of a single pole filter to
limit broadband noise ingression
100 ns
(1) The capacitance of the bulk cable is not included in the CCBLPLUG definition. It is modeled as a transmission line.
(2) UI denotes the time to transmit an unencoded data bit not the shortest high or low times on the wire after encoding with BMC. A single
data bit cell has duration of 1 UI, but a data bit cell with value 1 will contain a centrally place 01 or 10 transition in addition to the
transition at the start of the cell.
(3) CRECEIVER includes only the internal capacitance on a C_CCn pin when the pin is configured to be receiving BMC data. External
capacitance is needed to meet the required minimum capacitance per the USB-PD Specifications. TI recommends adding capacitance
to bring the total pin capacitance to 300 pF for improved TX behavior.
(4) Broadband noise ingression is because of coupling in the cable interconnect.
6.10 BC1.2 Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DATA CONTACT
DETECT
ID
P_SRC
DCD source current LDO_3V3 = 3.3 V 7 10 13 µA
R
DM_DWN
DCD pulldown resistance 14.25 20 24.8
kΩ
R
DP_DWN
DCD pulldown resistance 14.25 20 24.8
kΩ
V
LGC_HI
Threshold for no connection
C_USB_P ≥ VLGC_HI, LDO_3V3 =
3.3 V
2 V
V
LGC_LO
Threshold for connection
C_USB_P ≤ VLGC_LO
0.8 V
PRIMARY AND SECONDARY
DETECT
V
DX_SRC
Source voltage 0.55 0.6 0.65 V
VDX_ILIM VDX_SRC current limit 250 400 µA
I
DX_SNK
Sink Current
VC_USB_TN/BN ≥ 250 mV
25 75 125 µA
R
DCP_DAT
Dedicated Charging Port Resistance 200
Ω
DIVIDER MODE
VCx_USB_P
_2.7V
Cx_USB_P Output Voltage No load on Cx_USB_P 2.57 2.7 2.79 V
VCx_USB_N
_2.7V
Cx_USB_N Output Voltage No load on Cx_USB_N 2.57 2.7 2.79 V
RCx_USB_P
_30k
Cx_USB_P Output Impedance 5µA pulled from Cx_USB_P pin 24 30 36
kΩ
RCx_USB_N
_30k
Cx_USB_N Output Impedance 5µA pulled from Cx_USB_N pin 24 30 36
kΩ
1.2V MODE
RCx_USB_N
_102k
Cx_USB_N Output Impedance 5µA pulled from Cx_USB_N pin 80 102 130
kΩ
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TPS65987DDJ
ZHCSJP1A – MAY 2019 – REVISED AUGUST 2021
Copyright © 2021 Texas Instruments Incorporated
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