A5191HRT_11 ONSEMI [ON Semiconductor], A5191HRT_11 Datasheet - Page 5

• Manufacturer Part Number: A5191HRT_11
• Description: HART Modem
• Manufacturer: ONSEMI [ON Semiconductor]

Table 6. PIN OUT SUMMARY 28−PIN PLCC
Pin No.
2, 3, 4
7, 8, 9
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
11
1
5
6
Signal Name
TEST2, 3, 4
TEST7, 8, 9
RESETB
TEST10
TEST11
TEST12
CDREF
TEST1
TEST5
CBIAS
VDDA
RxAFI
XOUT
AREF
RTSB
RxAF
VDD
VSS
RxD
RxA
TxD
TxA
XIN
CD
RESET
TEST5
TEST7
TEST8
TEST9
AREF
Figure 3. Pin Out A5191HRT in 28-pin PLCC
TxA
Ground
Output
Output
Output
Output
Output
Output
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
−
−
−
10
11
5
6
7
8
9
12
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4
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
A5191HRT
13
3
14
2
15
1
5
28
16
27
17
26
18
25
24
23
22
21
20
19
Pin Description
TEST11
TxD
RTS
VDD
VSS
XIN
XOUT