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TPS2074 Datasheet(PDF) 3 Page - Texas Instruments

Part No. TPS2074
Description  FOUR-PORT USB HUB POWER CONTROLLERS
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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TPS2074 Datasheet(HTML) 3 Page - Texas Instruments

 
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TPS2074, TPS2075
FOUR-PORT USB HUB POWER CONTROLLERS
SLVS288A – SEPTEMBER 2000 – REVISED FEBRUARY 2001
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
PG_DLY†
1
Adjusts the PG time delay with a capacitor to ground. Adjust the pulse width to fit the application.
EN1
2
I
Active-low enable for OUT1
AGND
3
Analog ground
PG
4
O
Logic output, power good
SP
5
I
Self-power voltage input, connects to local power supply
SP
6
I
Self-power voltage input, connects to local power supply
NC
7
No internal connection
3.3V_OUT
8
O
3.3-V internal voltage regulator output
BPMODE‡
9
O
A logic signal that indicates if the outputs source from the bus-powered supply, BPMODE (TPS2074) or BPMODE
(TPS2075), can be used to signal the hub controller.
DP0_RST
10
O
Connects to DP signal from upstream hub/host through an external 1.5-k
Ω resistor
EN2
11
I
Active-low enable for OUT2
DGND
12
Digital ground
EN3
13
I
Active-low enable for OUT3
EN4
14
I
Active-low enable for OUT4
OC1
15
O
Logic output, overcurrent response for OUT1
OC2
16
O
Logic output, overcurrent response for OUT2
OC3
17
O
Logic output, overcurrent response for OUT3
OC4
18
O
Logic output, overcurrent response for OUT4
OUT4
19
O
Power switch output for downstream ports
OUT3
20
O
Power switch output for downstream ports
OUT2
21
O
Power switch output for downstream ports
OUT1
22
O
Power switch output for downstream ports
BP
23
I
Bus power voltage input, connect to VBUS
BP_DIS
24
I
Active-high logic input, disables autoswitch to bus power when self power is disconnected. Connect to BP or GND
† Use the following formula to calculate the capacitance needed;
C = (desired pulse width
× 3 × 10–6 / 1.22
‡ Pin 9 is active low for TPS2074 and active high for TPS2075.


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