For surface mount Schottky diodes (HSMS prefix) and surface mount PIN diodes (HSMP prefix), the last digit of the part number indicates the packaging configuration. Available options include:
code	configuration	package
0	single diode	SOT-23	, , ,
2	series pair	SOT-23	,
3	common anode pair	SOT-23
4	common cathode pair	SOT-23
5	unconnected pair	SOT-143	,
7	ring quad	SOT-143
8	bridge quad	SOT-143
9	crossover quad	SOT-143
B	single diode	SOT-323
C	series pair	SOT-323
E	common anode pair	SOT-323
F	common cathode pair	SOT-323
L	unconnected trio	SOT-363
M	common cathode quad	SOT-363
N	common anode quad	SOT-363
P	bridge quad	SOT-363
R	ring quad	SOT-363
T	low inductance single	SOT-363
U	series-shunt pair	SOT-363

The code 1 option shown below is now obsolete:

1

single diode (obsolete)

SOT-23