K20P48M50SF0 Datasheet, PDF (21/60 Pages) Freescale Semiconductor, Inc – K20 Sub-Family

Symbol
Table 10. General switching specifications (continued)
Description
Port rise and fall time (low drive strength)
• Slew disabled
• 1.71 ≤ V_DD ≤ 2.7V
• 2.7 ≤ V_DD ≤ 3.6V
• Slew enabled
• 1.71 ≤ V_DD ≤ 2.7V
• 2.7 ≤ V_DD ≤ 3.6V
Min.
Max.
Unit
—
12
ns
—
6
ns
—
36
ns
—
24
ns
General
Notes
5
1. This is the minimum pulse width that is guaranteed to pass through the pin synchronization circuitry. Shorter pulses may or
may not be recognized. In Stop, VLPS, LLS, and VLLSx modes, the synchronizer is bypassed so shorter pulses can be
recognized in that case.
2. The greater synchronous and asynchronous timing must be met.
3. This is the minimum pulse width that is guaranteed to be recognized as a pin interrupt request in Stop, VLPS, LLS, and
VLLSx modes.
4. 75pF load
5. 15pF load
5.4 Thermal specifications
5.4.1 Thermal operating requirements
Table 11. Thermal operating requirements
Symbol
T_J
T_A
Description
Die junction temperature
Ambient temperature
Min.
Max.
Unit
–40
125
°C
–40
105
°C
5.4.2 Thermal attributes
Board type
Single-layer
(1s)
Symbol
R_θJA
Four-layer
(2s2p)
R_θJA
Description 48 LQFP
Thermal
70
resistance,
junction to
ambient (natural
convection)
Thermal
47
resistance,
junction to
ambient (natural
convection)
48 QFN
81
28
Table continues on the next page...
Unit
°C/W
°C/W
Freescale Semiconductor, Inc.
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
Notes
1, 2
1, 3
21