sri4k STMicroelectronics, sri4k Datasheet - Page 41

• Manufacturer Part Number: sri4k
• Description: 13.56 Mhz Short-range Contactless Memory Chip With 4096-bit Eeprom And Anticollision Functions
• Manufacturer: STMicroelectronics

SRI4K
11
Package mechanical
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second-level interconnect. The category of
Second-Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97.
The maximum ratings related to soldering conditions are also marked on the inner box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 52. A3 antenna specification
1. Drawing is not to scale.
Table 10.
Symbol
F
A1
B1
NOM
P
Q
A
B
A
Coil width
Coil length
Inlay width
Inlay length
Overall thickness of copper antenna coil
Silicon thickness
Unloaded Q value
Unloaded free-air resonance
H-field energy for device operation
A3 antenna specification
Parameter
B1
B
Type
15.1
110
180
38
38
43
43
40
A
A1
37.5
42.5
37.5
42.5
Min
165
114
0.5
90
Package mechanical
Max
38.5
38.5
43.5
43.5
130
195
AI09046B
dbµA/m
MHz
Unit
A/m
mm
mm
mm
mm
µm
µm
41/49