SR1 Datasheet, PDF (14/21 Pages) STMicroelectronics – Integrated test mode

DC and AC parameters
SR1
Symbol
Parameter
Table 4. DC and AC characteristics
Test conditions⁽¹⁾
Min.
Typ.⁽²⁾
Max. Unit
V_CC Supply voltage
I_CC
Supply current
SR = V_CC, t_REC and t_SRC
counter is not running
2.0
5.5
V
0.4
1.0
µA
V_CC  4.5 V, sinking 3.2 mA
0.3
V
V_OL Reset output voltage low V_CC  3.3 V, sinking 2.5 mA
0.3
V
V_CC  2.0 V, sinking 1 mA
0.3
V
t_REC
Reset timeout delay,
factory-programmed
(device option)
140
210
280
ms
240
360
480
ms
R_PUO
Internal output pull-up
resistor on RST
(device option)
65
k
V_RST = 5.5 V, open drain
I_LO
Output leakage current device option without output
-0.1
pull-up resistor
0.1
µA
Smart Reset
t_SRC
V_IL
V_IH
R_PUI
I_LEAK
Smart Reset delay
SR input voltage low
T_A = -40 to +85 °C
T_A = 25 °C
SR input voltage high
Internal input pull-up
resistor on SR
(device option)
SR input leakage current
device option without input
pull-up resistor
Input glitch immunity
Test mode
0.8 x t_SRC
0.9 x t_SRC
V_SS-0.3
0.85
t_SRC(3)
65
1.2 x t_SRC
s
1.1 x t_SRC
0.3
V
5.5
V
k
-0.1
0.1
µA
t_SRC
s
V_TEST Test mode entry voltage
t_SRC-INI Initial test mode time
t_SRC-SHORT
Shortened Smart Reset
delay
V_CC +0.9 V_CC +1.1 V_CC +1.4 V
28
42
56
ms
t_SRC / 128
ms
1. Valid for ambient operating temperature T_A = -40 to +85 °C, V_CC = 2.0 to 5.5 V.
2. Typical values are at 25 °C and V_CC = 3.3 V unless otherwise noted.
3. Factory-programmable in the range of 0.5 s to 10 s typ. in 0.5 s steps.
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