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ZHCSFL8C October 2016 – August 2021 TPS65983B

PRODUCTION DATA

封裝選項

機械數據 (封裝 | 引腳)

ZBH|96
- MPBGAL7A

散熱焊盤機械數據 (封裝 | 引腳)

訂購信息

7.9 USB-PD Baseband Signal Requirements and Characteristics

Recommended operating conditions; T_A = –10 to +85°C unless otherwise noted

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
COMMON
PD_BITRATE	PD data bit rate		270	300	330	Kbps
UI⁽¹⁾	Unit interval (1/PD_BITRATE)		3.03	3.33	3.7	μs
CCBLPLUG⁽²⁾	Capacitance for a cable plug (each plug on a cable may have up to this value)				25	pF
ZCABLE	Cable characteristic impedance		32		65	Ω
CRECEIVER⁽³⁾	Receiver capacitance. Capacitance looking into C_CCn pin when in receiver mode.		70		120	pF
TRANSMITTER
ZDRIVER	TX output impedance. Source output impedance at the Nyquist frequency of USB2.0 low speed (750kHz) while the source is driving the C_CCn line.		33		75	Ω
TRISE	Rise Time. 10% to 90% amplitude points, minimum is under an unloaded condition. Maximum set by TX mask.		300			ns
TFALL	Fall Time. 90% to 10% amplitude points, minimum is under an unloaded condition. Maximum set by TX mask.		300			ns
RECEIVER
VRXTR	Rx Receive Rising Input threshold		605	630	655	mV
VRXTF	Rx Receive Falling Input threshold		450	470	490	mV
NCOUNT⁽⁴⁾	Number of transitions for signal detection (number to count to detect non-idle bus).		3
TTRANWIN⁽⁴⁾	Time window for detecting non-idle bus.		12		20	μs
ZBMCRX	Receiver input impedance	Does not include pullup or pulldown resistance from cable detect. Transmitter is Hi-Z.	10			MΩ
TRXFILTER⁽⁵⁾	Rx bandwidth limiting filter. Time constant of a single pole filter to limit broadband noise ingression		100			ns

(1) UI denotes the time to transmit an un-encoded 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.

(2) The capacitance of the bulk cable is not included in the CCBLPLUG definition. It is modeled as a transmission line.

(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. It is recommended to add capacitance to bring the total pin capacitance to 300 pF for improved TX behavior.

(4) BMC packet collision is avoided by the detection of signal transitions at the receiver. Detection is active when a minimum of NCOUNT transitions occur at the receiver within a time window of TTRANWIN. After waiting TTRANWIN without detecting NCOUNT transitions, the bus is declared idle.

(5) Broadband noise ingression is due to coupling in the cable interconnect.