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Data Sheet
Table 1: Pinout Summary 28-Pin PLCC, A5191HRTP/Pg (12197-504/508)
P
Piin
n N
No
o..
S
Siig
gn
na
all N
Na
am
me
e
T
Ty
yp
pe
e
P
Piin
n D
De
es
sc
crriip
pttiio
on
n
1
TEST1
Input
Connect to V
SS
2
TEST2
-
No connect
3
TEST3
-
No connect
4
TEST4
-
No connect
5
TEST5
Input
Connect to V
SS
6
INRESET
Input
Reset all digital logic when low
7
TEST7
Input
Connect to V
SS
8
TEST8
Input
Connect to V
SS
9
TEST9
Input
Connect to V
SS
10
OTXA
Output
Output transmit analog, FSK modulated HART
transmit signal to 4-20mA loop interface circuit
11
IAREF
Input
Analog reference voltage
12
ICDREF
Input
Carrier detect reference voltage
13
OCBIAS
Output
Comparator bias current
14
TEST10
Input
Connect to V
SS
15
VDDA
Power
Analog supply voltage
16
IRXA
Input
FSK modulated HART receive signal from
4-20mA loop interface circuit
17
ORXAF
Output
Analog receive filter output
18
IRXAC
Input
Analog receive comparator input
19
OXTL
Output
Crystal oscillator output
20
IXTL
Input
Crystal oscillator input
21
VSS
Ground
22
VDD
Power
Digital supply voltage
23
INRTS
Input
Request to sent
24
ITXD
Input
Input transmit date, transmitted HART data
stream from UART
25
TEST11
-
No connect
26
ORXD
Output
Received demodulated HART data to UART
27
OCD
Output
Carrier detect output
28
TEST12
-
No connect
Table 2: Pinout Summary 32-Pin LQFP, A5191HRTL/Lg (12197-503/507)
P
Piin
n N
No
o..
S
Siig
gn
na
all N
Na
am
me
e
T
Ty
yp
pe
e
P
Piin
n D
De
es
sc
crriip
pttiio
on
n
1
TEST5
Input
Connect to V
SS
2
INRESET
Input
Reset all digital logic when low, connect to VDD
for normal operation
3
TEST7
Input
Connect to V
SS
4
TEST8
Input
Connect to V
SS
5
TEST9
Input
Connect to V
SS
6
VSS
Ground Digital ground
7
OTXA
Output
Output transmit analog, FSK modulated HART
transmit signal to 4-20mA loop interface circuit
8
IAREF
Input
Analog reference voltage
9
ICDREF
Input
Carrier detect reference voltage
10
OCBIAS
Output Comparator bias current
11
TEST10
Input
Connect to V
SS
12
VSSA
Ground Analog ground
13
VDDA
Power
Analog supply voltage
14
IRXA
Input
FSK modulated HART receive signal from
4-20mA loop interface circuit
15
ORXAF
Output Analog receive filter output
16
IRXAC
Input
Analog receive comparator input
17
OXTL
Output Crystal oscillator output
18
IXTL
Input
Crystal oscillator input
19
VSSA
Ground Analog ground
20
VSS
Ground Digital ground
21
VDD
Power
Digital supply voltage
22
INRTS
Input
Request to send
23
ITXD
Input
Input transmit data, transmitted HART data
stream from UART
24
TEST11
-
No connect
25
ORXD
Output Received demodulated HART data to UART
26
OCD
Output Carrier detect output
27
TEST12
-
No connect
28
TEST1
Input
Connect to V
SS
29
TEST2
-
No connect
30
VDD
Power
Digital supply voltage
31
TEST3
-
No connect
32
TEST4
-
No connect