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參數(shù)資料
| 型號(hào)： | TUSB2077 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 7-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE |
| 中文描述： | 7 -端口通用串行總線與可選的串行EEPROM接口集線器 |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大?。?/td> | 242K |
| 代理商： | TUSB2077 |
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TUSB2077A
7-PORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROMINTERFACE
SLLS414 – MARCH 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
BUSPWR
10
I
Power source indicator. BUSPWR is an active low input that indicates whether the downstream ports
source their power from the USB cable or a local power supply. For the bus-power mode, this pin should
be pulled low, and for the self–powered mode, this pin should be pulled to 3.3 V. Input must not change
dynamically during operation.
DM0
4
I/O
Root port USB differential data minus. DM0 paired with DP0 constitutes the upstream USB port.
DM1 – DM7
13, 17, 21, 26,
30, 34, 38
I/O
USB differential data minus. DM1 – DM7 paired with DP1 – DP7 support up to seven downstream USB
ports.
DP0
3
I/O
Root port USB differential data plus. DP0 paired with DM0 constitutes the upstream USB port.
DP1 – DP7
14, 18, 22, 27,
31, 35, 39
I/O
USB differential data plus. DP1 – DP7 paired with DM1 – DM7 support up to seven downstream USB
ports.
DP0PUR
2
O
Pull-up resistor connection. When a system reset happens (RESET being driven to low, but not USB
reset) or any logic level change on BUSPWR terminal, DP0PUR output is inactive (floating) until the
internal counter reaches a 15 ms time period. After the counter expires, DP0PUR is driven to the VCC
(3.3 V) level thereafter until the next system reset event occurs or there is a BUSPWR logic level
change.
EECLK
7
O
EEPROM serial clock. When EXTMEM is high, the EEPROM interface is disabled. The EECLK pin is
disabled and should be left floating (unconnected). When EXTMEM is low, EECLK acts as a 3-state
serial clock output to the EEPROM with a 100
μ
A internal pulldown.
EEPROM serial data/power management mode indicator. When EXTMEM is low, EEDATA/
GANGED acts as a serial data I/O for the EEPROM and is internally pulled down with a 100
μ
A
pulldown. When EXTMEM is high, EEDATA/GANGED selects between gang or per port power
over–current detection for the downstream ports. This standard TTL input must not change dynamically
during operation.
EEDATA/
GANGED
8
I/O
EXTMEM
47
I
EEPROM read enable. When EXTMEM is high, the serial EEPROM interface of the device is disabled.
When EXTMEM is low, terminals 7 and 8 are configured as the clock and data pins of the serial
EEPROM interface, respectively.
GND
HUBCFG
5, 24, 43
Ground. GND terminals must be tied to ground for proper operation.
40
O
Hub configured. Used to control LED indicator. When the hub is configured, HUBCFG is high, which
can be used to turn on a green LED. When the hub is not configured, HUBCFG is low, which can be
used to turn on a red LED.
MODE
48
I
Mode select. When MODE is low, the APLL output clock is selected as the clock source to drive the
internal core of the chip and 6-MHz crystal or oscillator can used. When MODE is high, the clock on
XTAL1/CLK48 is selected as the clock source and 48-MHz oscillator or other on-board clock source
can be used.
OVRCUR1 –
OVRCUR7
12, 16, 20, 25,
29, 33, 37
I
Over-current input. OVRCUR1 – OVRCUR7 are active low. For per-port over current detection, one
over-current input is available for each of the seven downstream ports. In the ganged mode, any
OVRCUR input may be used and all OVRCUR pins should be tied together. OVRCUR pins have noise
filtering logic.
PORTPWR
41
O
Any port powered. Used to control LED indicator. When any port is powered on, PORTPWR is high,
which can be used to turn on a green LED. When all ports are off, PORTPWR is low, which can be used
to turn on a red LED.
PORTDIS
42
O
No ports disabled. PORTDIS is used for LED indicator control. When no port is disabled, PORTDIS is
high, which can be used to turn on a green LED. When any port is disabled, PORTDIS is low, which
can be used to turn on a red LED.
PWRON1 –
PWRON7
11, 15, 19, 23,
28, 32, 36
O
Power-on/-off control signals. PWRON1 – PWRON7 are active low, push-pull outputs that enables the
external power switch device. Push-pull outputs eliminate the pull-up resistors which are required by
for open-drain outputs. However, the external power switches that connect to these pins must be able
to operate with 3.3-V inputs because these outputs cannot drive 5-V signals.
RESET
6
I
Reset. RESET is an active low TTL input with hysteresis and must be asserted at power up. When
RESET is asserted, all logic is initialized. Generally, a reset with a pulse width between 100
μ
s and 1
ms is recommended after 3.3-V VCC reaching its 90%. The clock signal must be active during the last
60
μ
s of the reset window.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TUSB2077A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:7-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE |
| TUSB2077APT | 功能描述:USB 接口集成電路 7-Port Hub W/Opt Ser EEPROM Ifc RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| TUSB2077APT | 制造商:Texas Instruments 功能描述:HUB UNI SERIAL BUS 7 PORT 48LQFP 制造商:Texas Instruments 功能描述:HUB, UNI SERIAL BUS, 7 PORT, 48LQFP 制造商:Texas Instruments 功能描述:HUB, UNI SERIAL BUS, 7 PORT, 48LQFP; USB Type:USB Transceiver; USB Version:1.1; Supply Voltage Min:3V; Supply Voltage Max:3.6V; Digital IC Case Style:LQFP; No. of Pins:48; Data Rate:12Mbps; No. of Ports:7; Operating Temperature ;RoHS Compliant: Yes |
| TUSB2077APTG4 | 功能描述:USB 接口集成電路 7-Port USB Hub RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| TUSB2077APTR | 功能描述:USB 接口集成電路 7-Port Hub W/Opt Ser EEPROM Ifc RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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