PEF81912 Datasheet, PDF (258/276 Pages) Infineon Technologies AG – Q-SMINT®IX 2B1Q Second Gen. Modular ISDN NT (Intelligent eXtended)

PEF 81912/81913
Electrical Characteristics
V_DD= 3.3 V ± 5 %; V_SS= 0 V; T_A = -40 to 85 °C
Parameter
Symbol
Limit Values
Unit Test Condition
min. typ. max.
Delay for activation
t_ACT
of RSTO
10
µs
Delay for deactivation t_DEACT
64
ms
of RSTO
1)
The Detection
Q-SMINT^®IX.
Threshold
Therefore,
V_DET is far below the specified supply voltage range of analog and digital parts of the
the board designer must take into account that a range of voltages is existing, where
neither performance and functionality of the Q-SMINT^®IX are guaranteed, nor a reset is generated.
2) _{If the integrated Power-On Reset of the Q-SMINTIX is selected (VDDDET = ’0’) and the supply voltage VDD is}
ramped up from 0V to 3.3V +/- 5%, then the Q-SMINTIX is kept in reset during V_DDmin < V_DD < V_DET + V_Hys.
V_DD must be ramped up so slowly that the Q-SMINTIX leaves the reset state after the oscillator circuit has
already finished start-up. The start-up time of the oscillator circuit is typically in the range between 3ms and
12ms.
Data Sheet
242
2001-03-30