CAT705 Datasheet, PDF (5/14 Pages) Catalyst Semiconductor – μP Supervisory Circuits

CAT705, CAT706, CAT813
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Typical values at T_A = 25°C and V_CC = 5V for CAT705, CAT706, and CAT813 versions;
V_CC = 3.3V for the CAT706 T/S versions; V_CC = 3.0V for the CAT706 R version.
Symbol Parameter
WATCHDOG INPUT
t_WD Watchdog Timeout Period
t_WP WDI Pulse Width
V_IL
WDI Input Voltage⁽³⁾
V_IH
WDI Input Current⁽⁴⁾
Conditions
V_IL = 0.4 V, V_IH = 0.8 x V_CC
WDI = V_CC, Time Average
WDI = 0V, Time Average
Min
1.00
50
0.7 x V_CC
-150
Typ
Max Units
1.6
2.25
s
ns
0.3 x V_{CC V}
50
150
µA
-50
V_{W_OH}
WDO Output Voltage
V_{W_OL}
MANUAL RESET INPUT
V_IL
¯M¯R¯ Input Voltage
V_IH
¯M¯R¯ Pull-up Current
t_PB
t_PDLY
¯M¯R¯ Pulse Width
¯M¯R¯ low to Reset Delay⁽⁵⁾
POWER-FAIL INPUT
PFI Input Threshold
PFI Input Current
V_{RST (max)} < V_CC < 3.6 V
I_SOURCE = -500 µA
4.5 V < V_CC < 5.5 V,
I_SOURCE = -800 µA
V_{RST (max)} < V_CC < 3.6 V,
I_SINK = +500 µA
4.5 V < V_CC < 5.5 V,
I_SINK = 1.2 mA
¯M¯R¯ = 0 V
V_CC = 5 V
0.8 x V_CC
V_CC – 1.5 V_CC – 0.25
V
0.3
0.1
0.4
0.7 x V_CC
40
1
1.2
-25
0.3 x V_{CC V}
70
140
µA
µs
5
µs
1.25
1.3
V
0.01
25
nA
V_{P_OH}
¯P¯F¯O¯ Output Voltage
V_{P_OL}
V_{RST (max)} < V_CC < 3.6 V,
I_SOURCE = -500 µA
4.5 V < V_CC < 5.5 V,
I_SOURCE = -800 µA
V_{RST (max)} < V_CC < 3.6 V,
I_SINK = +1.2 mA
4.5 V < V_CC < 5.5 V,
I_SINK = 3.2 mA
0.8 x V_CC
V_CC - 1.5V
0.4
V
0.3
0.4
Notes:
(3) WDI is internally serviced within the watchdog period if WDI is left open.
(4) The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to a
three-stated output device can be disabled in the tristate mode as long as the leakage current is less than 10µA and a maximum
capacitance of less than 200pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200µA
when active.
(5) R¯¯E¯S¯E¯T¯ for CAT705 & CAT706 & RESET for CAT813.
© 2010 SCILLC. All rights reserved.
5
Characteristics subject to change without notice
Doc. No. MD-3030, Rev. D