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參數(shù)資料
| 型號： | ST7538P |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | POWER LINE FSK TRANSCEIVER |
| 中文描述： | 電力線FSK收發(fā)器 |
| 文件頁數(shù)： | 25/30頁 |
| 文件大?。?/td> | 264K |
| 代理商： | ST7538P |
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ST7538
Zero Crossing Detection
The Mains Voltage Zero Crossing can be detected, through a proper connection of ZCIN to the Mains.
ZCIN comparator has a threshold fixed at SGND. ZCOUT is a TTL Output forced High after a positive
zero-crossing transition, and low after a negative one.
Setting the Bit 11 inside the Control Register to “1” the transmission is automatically synchronized to the
mains positive zero-crossing transition. This function is achieved turning on the PLI when RX/TX is low
and delaying the CLR/T first transition until the first zero-crossing event. The automatic synchronization
procedure can work only if the synchronous interface is programmed. If asynchronous interface is in use
the Zero Crossing synchronization can be achieved managing the ZCOUT line.
Figure 19. Synchronous Zero-Crossing Transmission
Output Clock
MCLK is the master clock output. The clock frequency sourced can be programed through the control reg-
ister to be a ratio of the crystal oscillator frequency (Fosc, Fosc/2 Fosc/4). The transition between one fre-
quency and another is done only at the end of the ongoing cycle.
Reg OK
REGOK allows to detect an undesired modification of the control register content. REGOK function is dis-
abled during a control register writing session.
Under Voltage Lock Out
The UVLO function turns off the device if the PAVdd voltage falls under 4V. Hysteresis is 340mV typically.
Thermal Shutdown
The ST7538 is provided of a thermal protection which turn off the PLI when the junction temperature ex-
ceeds 170°C ±10% . Hysteresis is around 30°C.
When shutdown threshold is overcome, PLI interface is switched OFF.
Thermal Shutdown event is notified to the HOST controller using TIMEOUT line. When TIMEOUT line is
High, ST7538 junction temperature exceed the shutdown threshold (Not Lached).
5V Voltage Regulator and Power Good Function
ST7538 has an embedded 5V linear regulator externally available to supply the application circuitry.
The linear regulator has a very low quiescent current (50
μ
A) and a current capability of 100mA. The reg-
ulator is protected against short circuitry events.
When the regulator Voltage is above the power good threshold (V
PG)
, Power Good line is forced high,
while is forced low at startup and when VDC falls below V
PG
- V
PGHYS
Voltage.
t
ZCIN
RxTx
CLR/T
TxD
ZCOUT
ZC
DEL
D03IN1423
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST7538P013TR | 功能描述:電信集成電路 1/2 Duplex FSK Modem RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| ST7538Q | 功能描述:電信線路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| ST7538QTR | 功能描述:電信線路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| ST7540 | 功能描述:電信線路管理 IC FSK powerline transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| ST7540TR | 功能描述:電信線路管理 IC FSK powerline transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
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