Datasheet

TPS65950
www.ti.com SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
Table 7-11 lists the parameters of the HS differential transmitter.
Table 7-11. HS Differential Transmitter
Parameter Comments Min Typ Max Unit
Output Levels for HS
HS TX idle level V
HSOI
Absolute voltage DP/DM – Both
–10 0 10 mV
internal/external 45 Ω
HS TX data signaling high V
HSOH
Absolute voltage DP/DM – Both
360 400 440 mV
internal/external 45 Ω
HS data signaling low V
HSOL
–10 0 10 mV
Chirp J level V
CHIRPJ
Differential voltage 700 800 1100 mV
Chirp K level V
CHIRPK
Differential voltage –900 –800 –500 mV
HS TX disconnect threshold V
DISCOUT
Absolute voltage DP/DM—No external 45 Ω 700 mV
Driver Characteristics
Rise time t
HSR
(10%–90%) 500 ps
Fall time t
HSF
(10%–90%) 500 ps
Driver output resistance Z
HSDRV
Also serves as HS termination 40.5 45 49.5 Ω
7.2.4.7 CEA/MCPC/UART Driver
Table 7-12 lists the parameters of the CEA/MCPC/UART driver.
Table 7-12. CEA/MCPC/UART Driver
Parameter Comments Min Typ Max Unit
UART Driver CEA
Phone UART edge rates t
PH_UART_EDGE
DP_PULLDOWN asserted 1 μs
Serial interface output high V
OH_SER
ISOURCE = 4 mA 2.4 3.3 3.6 V
Serial interface output low V
OL_SER
ISINK = –4 mA 0 0.1 0.4 V
UART Driver MCPC to DM.TX.
Input high level V
IH
(*) At DATA0 pin VIO – 0.45 V
Input low level V
IL
At DATA0 pin 0.45 V
MCPC DM external pullup R
MCPCDM
External pullup 4.7k 10k Ω
MCPC DM pullup supply MCPCVDDEXT External pullup supply 1.8 3.3 V
External pullup asserted
Open-drain output high level Z
OH
HiZ Ω
HiZ means high impedance equivalent to
open
With open-drain NMOS to ground is ON
Open-drain output low level V
OL
0 0.6 V
and external pullup is asserted.
Carkit Pulse Driver
Pulse match tolerance QPLS_MTCH ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 5%
Phone D– interrupt pulse
t
PH_PLS_POS
ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 200 600 ns
width
Phone positive pulse voltage V
PH_PLS_POS
ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 2.8 3.6 V
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