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TPS3128 Datasheet(PDF) 7 Page - Texas Instruments

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Part # TPS3128
Description  ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS3128 Datasheet(HTML) 7 Page - Texas Instruments

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TIMING REQUIREMENTS
SWITCHING CHARACTERISTICS
TPS3123-xx
TPS3124-xx, TPS3125-xx
TPS3126-xx, TPS3128-xx
SLVS227B – AUGUST 1999 – REVISED FEBRUARY 2004
ELECTRICAL CHARACTERISTICS (continued)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TPS3123-xx
VDD = 0.75 V
14
WDI = VDD,
TPS3124-xx
MR unconnected
VDD = 3.3 V
22
30
TPS3128-xx
IDD
Supply current
µA
VDD = 0.75 V
14
TPS3125-xx
MR unconnected
TPS3126-xx (2)
VDD = 3.3 V
18
25
Ci
Input capacitance at MR, WDI
VI = 0 V to 3.3 V
5
pF
(2)
The supply current during delay time td is typical 5 µA higher.
at R
L = 1 MΩ, CL = 50 pF, TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
At VDD
VIH = VIT- + 0.2 V,
VIL = VIT - -0.2 V
6
tw
Pulse width
At MR
1
µs
VDD ≥ VIT- + 0.2 V,
VIL = 0.3 x VDD,
VIH = 0.7 × VDD
At WDI
0.1
at R
L = 1 MΩ, CL = 50 pF, TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDD ≥ VIT- + 0.2 V,
ttout
Watchdog time out
0.8
1.4
2.1
s
See timing diagram
VDD > VIT- + 0.2 V,
td
Delay time
100
180
260
ms
See timing diagram
MR to RESET delay
tPHL
Propagation delay time, high-to-low-level output
0.1
VDD ≥ VIT-+ 0.2 V,
(TPS3123/5/6/8)
VIL = 0.2 × VDD,
µs
MR to RESET delay
VIH = 0.8 × VDD
tPLH
Propagation delay time, low-to-high-level output
0.1
(TPS3125/6)
tPHL
Propagation delay time, high-to-low-level output
VDD to RESET delay
10
VIL = VIT- - 0.2 V,
µs
VDD to RESET delay
VIH = VIT- + 0.2 V
tPLH
Propagation delay time, low-to-high-level output
10
(TPS3124/5/6)
7


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