# Mechanical information
Source: [https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html)
## Device physical dimensions
Source: [https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html)
### QCC748 QFN-56 device physical dimensions
Source: [https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html)
Figure : QCC748 QFN-56 package drawing
| Symbol | Unit of measure = millimeter | Unit of measure = millimeter | Unit of measure = millimeter |
| --- | --- | --- | --- |
| Symbol | Min | Nom | Max |
| A | 0.80 | 0.85 | 0.90 |
| A1 | 0.00 | 0.02 | 0.05 |
| A2 | 0.60 | 0.65 | 0.70 |
| A3 | 0.20 REF | 0.20 REF | 0.20 REF |
| b | 0.15 | 0.20 | 0.25 |
| D | 6.90 | 7.00 | 7.10 |
| E | 6.90 | 7.00 | 7.10 |
| D2 | 5.10 | 5.20 | 5.30 |
| E2 | 5.10 | 5.20 | 5.30 |
| e | 0.30 | 0.40 | 0.50 |
| H | 0.35 REF | 0.35 REF | 0.35 REF |
| K | 0.50 REF | 0.50 REF | 0.50 REF |
| L | 0.35 | 0.40 | 0.45 |
| R | 0.09 | - | - |
| | | | |
## Part marking
Source: [https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html)
### QCC748 part marking
Source: [https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html)
Figure : QCC748 device marking
| Line | Marking | Description |
| --- | --- | --- |
| C1 | Qualcomm | Qualcomm name |
| P1 | PRODUCT | Qualcomm Technologies, Inc. (QTI) product name |
| P2 | VARIANT | Variant code (PRR) |
| T1 | FAYWWXXX | F = supply source codeA = S (SPIL, Suzhou) A = 1 (TFME)
Page-1 Sheet.1 Sheet.2 Sheet.3 Sheet.4 Sheet.5 Example Sheet.6 Device ID code code Sheet.7 Symbol definition definition Sheet.8 Product name name Sheet.9 AAA-AAAA Sheet.10 Config code code Sheet.11 P Sheet.12 Sheet.13 Sheet.14 Sheet.15 Sheet.16 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Sheet.21 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Sheet.27 Sheet.28 Sheet.29 Sheet.30 Sheet.31 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.41 Sheet.42 Sheet.43 Sheet.44 Sheet.45 Sheet.46 Sheet.47 Number of pins of pins Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Package type type Sheet.56 Sheet.57 Sheet.58 Sheet.59 Sheet.60 Sheet.61 Sheet.62 Sheet.63 Shipping package package Sheet.64 Sheet.65 Sheet.66 Sheet.67 Sheet.68 Sheet.69 Sheet.70 Sheet.71 Product revision revision Sheet.72 Sheet.73 Sheet.74 Sheet.75 Sheet.76 Sheet.77 Sheet.78 Sheet.79 Source code code Sheet.80 Sheet.81 Sheet.82 Sheet.83 Sheet.84 Sheet.85 Sheet.86 Sheet.87 BBB Sheet.88 CCC Sheet.89 EE Sheet.90 RR Sheet.91 S Sheet.92 — Sheet.93 — Sheet.94 — Sheet.95 — Sheet.96 — Sheet.97 WCN-7881 8 Sheet.98 1 Sheet.99 NSP Sheet.100 377 Sheet.101 TR or MT Sheet.102 00 1 Sheet.103 0 Sheet.104 — Sheet.105 — Sheet.106 — Sheet.107 — Sheet.108 — Sheet.109 Sheet.110 Sheet.111 Sheet.112 Sheet.113 Sheet.114 Sheet.115 Sheet.116 Sheet.117 Sheet.118 Sheet.119 CCC is not a fixed length; it depends on the # of pins in the... the # of pins in the package. Sheet.120 Sheet.121 Package type varies in the # of characters. the # of characters. Sheet.122 Sheet.123 Feature or PID Code PID Code Sheet.124 BB Sheet.125 —
JA | Thermal resistance, J-to-A | Junction-to-ambient (still air) [^1^](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html#fntarg_1_thermal-characteristics) | 38 | °C/W |
[^1^](https://docs.qualcomm.com/doc/80-WL748-1/topic/mechanical-information.html#fnsrc_1_thermal-characteristics) Package mounted on 4LPCB using
Finite Differential Modeling (FDM) method.
Last Published: Apr 22, 2026
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