STM6778 STMicroelectronics, STM6778 Datasheet - Page 21

• Manufacturer Part Number: STM6778
• Description: Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
• Manufacturer: STMicroelectronics

Specifications of STM6778

• Primary Supply (vcc1) Monitor. Fixed (factory-programmed) Reset Thresholds: 4.63 V to 1.58 V
• Fixed (factory-programmed) Reset Thresholds: 3.08 V to 0.79 V
• Tertiary Supply Monitor (using Externally Adjustable Rstin): 0.626 V internal reference
• Reset Delay Time (trec) On Power-up: 13.2 ms, 210 ms, 900 ms (typ)
• Operating Temperature: –40 °C to 85 °C (industrial grade)

STM6717/6718/6719/6720/STM6777/6778/6779/6780
Table 6.
1. Valid for ambient operating temperature: T
2. Input leakage for the MRC pin is not tested.
3. Guaranteed by design.
4. The leakage current measured on the RST pin is tested with the reset de-asserted (output high impedance).
Table 7.
1. At 25 °C (typical)
Manual (push-button) reset input
t
t
Sym
MLMH
MLRL
V
noted).
V
IH
IL
V
1.6 V
2.0 V
3.0 V
4.0 V
5.0 V
CC1
native
Alter-
t
t
MRD
MR
DC and AC characteristics (continued)
t
MLMH
MR minimum pulse width
MR minimum pulse width
MR to RST output delay
100 pF
120 µs
122 µs
125 µs
128 µs
130 µs
minimum pulse width
MR pull-up resistance
(STM6717/18/19/20)
(STM6777/78/79/80)
(STM6717/18/19/20)
MR glitch immunity
MR input voltage
Description
120 ms
122 ms
125 ms
129 ms
130 ms
0.1 µF
A
= –40 to 85 °C; V
Doc ID 11469 Rev 8
2.2 µF
MRC connected via
2.6 s
2.7 s
2.7 s
2.8 s
2.8 s
Test condition
Capacitor value
capacitor to V
CC1
= 0.8 to 5.5 V and V
SS
3.3 µF
(1)
4.0 s
4.0 s
4.1 s
4.2 s
4.3 s
(1)
CC2
= 0.8 to 3.6 V (except where
0.7V
Min
25
1
4.7 µF
DC and AC parameters
CC1
5.6 s
5.8 s
5.9 s
6.0 s
6.1 s
Typ
200
100
50
6
0.3V
Max
80
C1
6.8 µF
8.2 s
8.3 s
8.5 s
8.7 s
8.8 s
C
21/30
Unit
kΩ
µs
µs
ns
ns
V
V