IMP1832
Absolute Maximum Ratings
Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V
Voltage on ST, TD . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V
Voltage on PBRST, RESET, RESET . . . . . . . . –0.5V to VCC + 0.5V
Operating Temperature Range . . . . . . . . . . . –40°C to 85°C
Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds
Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C
Voltages measured with respect to ground.
These are stress ratings only and functional operation is not implied.
Electrical Characteristics
Unless otherwise stated, 1.2V ≤ VCC ≤ 5.5V and over the operating temperature range of –40°C to +85°C . All voltages are referenced
to ground.
Parameter
Supply Voltage (VCC
Symbol
VCC
VIH
Conditions
Min
1.0
Typ
Max
5.5
Units
V
)
ST and PBRST Input High Level
ST and PBRST Input High Level
ST and PBRST Input Low Level
VCC Trip Point (TOL = GND)
VCC ≥ 2.7V
VCC < 2.7V
2
VCC + 0.3V
V
VIH
VCC - 0.4V
–0.3
2.80
2.47
62.5
500
V
VIL
0.5
2.97
2.64
250
V
VCCTP
VCCTP
tTD
2.88
2.55
150
V
VCC Trip Point (TOL = VCC
)
V
Watchdog Time-Out Period
Watchdog Time-Out Period
Watchdog Time-Out Period
Output Voltage
TD = GND
ms
ms
ms
V
tTD
TD = VCC
1200
610
2000
1000
tTD
TD floating
250
VOH
IOH
I = –500µA, VCC < 2.7V
Output = 2.4V, VCC ≥ 2.7V
Output = 0.4V, VCC ≥ 2.7V
VCC - 0.3V VCC - 0.1V
Output Current
350
µA
mA
µA
V
Output Current
IOL
10
Input Leakage
IIL
–1.0
1.0
0.4
RESET Low Level
Internal Pull-Up Resistor
Operating Current
VOL
PBRST pin
40
kΩ
µA
ICC1
Outputs open. VCC ≤ 3.6V
20
and all inputs at VCC or GND
Input Capacitance
Output Capacitance
CIN
COUT
tPB
5
7
pF
pF
ms
PBRST Manual Reset
Minimum Low Time
PBRST = VIL
20
Reset Active Time
ST Pulse Width
tRST
tST
250
20
610
5
1000
8
ms
ns
Must not exceed tRD minimum.
Watchdog cannot be disabled.
VCC Fail Detect to
RESET or RESET
tRPD
Pulses < 2µs at VCCTP
µs
minimum will not cause reset.
VCC Slew Rate
tF
20
µs
PBRST Stable LOW to
tPDLY
20
ms
RESET and RESET Active
VCC Detect to RESET or
RESET Inactive
tRPU
tR
trise = 5µs
250
0
610
1000
ms
ns
VCC Slew Rate
©
1999 IMP, Inc.
408-432-9100/ www.impweb.com
3
IMP [ IMP, INC ]
