STM6778 STMicroelectronics, STM6778 Datasheet - Page 18

• 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)

DC and AC parameters
5
18/30
DC and AC parameters
This section summarizes the operating measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC characteristics tables that
follow, are derived from tests performed under the measurement conditions summarized in
Table 5: Operating and AC measurement
operating conditions in their circuit match the operating conditions when relying on the
quoted parameters.
Table 5.
Figure 25. AC testing input/output waveforms
Figure 26. MR timing waveform (STM6717/18/19/20)
Figure 27. MR timing waveform (STM6777/78/79/80)
1. By connecting a certain capacitor between the MRC pin and V
V
Ambient operating temperature (T
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
CC
RST
more (t
RST
MR
MR
supply voltage
MLMH
t
MLMH
Operating and AC measurement conditions
, see
Table 7 on page
Parameter
t
MLRL
0.8V CC
0.2V CC
t
MLMH
(1)
Doc ID 11469 Rev 8
A
21).
)
t
MLRL
STM6717/6718/6719/6720/STM6777/6778/6779/6780
conditions. Designers should check that the
t
rec
SS
t rec
, the RST can be delayed from 6 µs or
0.2 to 0.8V
0.3 to 0.7V
STM67xx
0.8 to 5.5
–40 to 85
≤ 5
0.7V CC
0.3V CC
CC
CC
Unit
°C
ns
V
V
V
AI10423a
AI10424c
AI02568