A5191HRT
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6
A5191HRT
1
2
3
4
5
6
7
8
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
24
23
22
21
20
19
18
17
TEST5
TEST7
TEST8
TEST9
TxA
AREF
RESET
VSS
CDREF
CBIAS
TEST10
VDDA
RxA
RxAF
RxAFI
VSSA
TEST11
TxD
RTS
VDD
VSS
XIN
XOUT
VSSA
TEST4
TEST3
TEST2
TEST1
TEST12
CD
RxD
VDD
A5191HRT
1
2
3
4
5
6
7
8
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
24
23
22
21
20
19
18
17
TEST5
TEST7
TEST8
TEST9
TxA
AREF
RESET
VSS
CDREF
CBIAS
TEST10
VDDA
RxA
RxAF
RxAFI
VSSA
TEST11
TxD
RTS
VDD
VSS
XIN
XOUT
VSSA
TEST4
TEST3
TEST2
TEST1
TEST12
CD
RxD
VDD
Figure 4. Pin Out A5191HRT in 32-pin QFN and LQFP (top view)
Table 7. PIN OUT SUMMARY 32−PIN QFN AND LQFP
Pin No. Signal Name Type Pin Description
1 TEST5 Input Connect to VSS
2 RESETB Input Reset all logic when low, connect to VDD for normal operation
3, 4, 5 TEST7, 8, 9 Input Connect to VSS
6 VSS Ground Digital ground
7 TxA Output Transmit Data Modulator output
8 AREF Input Analog reference voltage
9 CDREF Input Carrier detect reference voltage
10 CBIAS Output Comparator bias current
11 TEST10 Input Connect to VSS
12 VSSA Ground Analog ground
13 VDDA Power Analog supply voltage
14 RxA Input Receive Data Modulator input
15 RxAF Output Analog receive filter output
16 RxAFI Input Analog receive comparator input
17 XOUT Output Crystal oscillator output
18 XIN Input Crystal oscillator input
19 VSSA Ground Analog ground
20 VSS Ground Digital ground
21 VDD Power Digital supply voltage
22 RTSB Input Request to send
23 TxD Input Input transmit data, transmit HART data stream from microcontroller
24 TEST11 − Do Not Connect
25 RxD Output Received demodulated HART data to microcontroller
26 CD Output Carrier detect output
27 TEST12 − Do Not Connect
28 TEST1 Input Connect to VSS
29 TEST2 − Do Not Connect
30 VDD Power Digital supply voltage
31, 32 TEST3, 4 − Do Not Connect
EP Exposed Pad Power Connect to VSS (QFN only)
