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PDF A5191HRT Data sheet ( Hoja de datos )
| Número de pieza | A5191HRT | |
| Descripción | HART Modem | |
| Fabricantes | ON Semiconductor | |
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A5191HRT
HART Modem
Description
The A5191HRT is a single−chip, CMOS modem for use in highway
addressable remote transducer (HART) field instruments and masters.
The modem and a few external passive components provide all of the
functions needed to satisfy HART physical layer requirements
including modulation, demodulation, receive filtering, carrier detect,
and transmit−signal shaping.
The A5191HRT uses phase continuous frequency shift keying
(FSK) at 1200 bits per second. To conserve power the receive circuits
are disabled during transmit operations and vice versa. This provides
the half−duplex operation used in HART communications.
Features
• Single−chip, Half−duplex 1200 Bits per Second FSK Modem
• Bell 202 Shift Frequencies of 1200 Hz and 2200 Hz
• 3.0 V − 5.5 V Power Supply
• Transmit−signal Wave Shaping
• Receive Band−pass Filter
• Low Power: Optimal for Intrinsically Safe Applications
• Compatible with 3.3 V or 5 V Microcontroller
• Internal Oscillator Requires 460.8 kHz Crystal or Ceramic Resonator
• Meets HART Physical Layer Requirements
• Industrial Temperature Range of −40°C to +85°C
• Available in 28−pin PLCC, 32−pin QFN and 32−pin LQFP Packages
• These are Pb−Free Devices
Applications
• HART Multiplexers
• HART Modem Interfaces
• 4 − 20 mA Loop Powered Transmitters
www.onsemi.com
PLCC−28
P SUFFIX
CASE 776AA
QFN−32
N SUFFIX
CASE 488AM
LQFP−32
L SUFFIX
CASE 561AB
MARKING DIAGRAMS
(Top Views)
1 28
A5191HRTPG
AWLYYWW
A5191
HRTL
AWLYYWWG
32
1
1
A5191
HRTNG
AWLYYWW
G
A5191HRTxx = Specific Device Code
xx = P (PLCC), L (LQFP) or N (QFN)
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G or G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
September, 2016 − Rev. 9
1
Publication Order Number:
A5191HRT/D
1 page  
A5191HRT
4 3 2 1 28 27 26
TEST5 5
RESET 6
TEST7 7
TEST8 8
TEST9 9
TxA 10
AREF 11
A5191HRT
25 TEST11
24 TxD
23 RTS
22 VDD
21 VSS
20 XIN
19 XOUT
12 13 14 15 16 17 18
Figure 3. Pin Out A5191HRT in 28-pin PLCC
Table 6. PIN OUT SUMMARY 28−PIN PLCC
Pin No.
Signal Name
Type
1
TEST1
Input
2, 3, 4
TEST2, 3, 4
−
5
TEST5
Input
6
RESETB
Input
7, 8, 9
TEST7, 8, 9
Input
10 TxA Output
11
AREF
Input
12
CDREF
Input
13
CBIAS
Output
14
TEST10
Input
15
VDDA
Power
16 RxA Input
17
RxAF
Output
18
RxAFI
Input
19
XOUT
Output
20 XIN Input
21
VSS
Ground
22
VDD
Power
23
RTSB
Input
24 TxD Input
25 TEST11
−
26 RxD Output
27 CD Output
28 TEST12
−
Pin Description
Connect to VSS
Do Not Connect
Connect to VSS
Reset all digital logic when low
Connect to VSS
Transmit Data Modulator output
Analog reference voltage
Carrier detect reference voltage
Comparator bias current
Connect to VSS
Analog supply voltage
Receive Data Modulator input
Analog receive filter output
Analog receive comparator input
Crystal oscillator output
Crystal oscillator input
Ground
Digital supply voltage
Request to send
Input transmit date, transmitted HART data stream from microcontroller
Do Not Connect
Received demodulated HART data to microcontroller
Carrier detect output
Do Not Connect
www.onsemi.com
5
5 Page 
A5191HRT
PACKAGE DIMENSIONS
PLCC 28 LEAD
CASE 776AA
ISSUE O
www.onsemi.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet A5191HRT.PDF ] | |
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