IN1705

TECHNICAL DATA
IN1705
Micro Monitor Supply Control
The IN1705 is designed to control power supply and to start microcontroller and microprocessor systems. It is used for securing stable functioning of the system when starting and halting the device as
well as in the case of the supply voltage drops.
Manufactured in 8-pin SOIC/DIP package MS-012AA.
LSI features:





rated supply voltage 5.0 V;
generation of reset signal when power supply is on for
correct start of microprocessor;
generation of reset signal when power supply drops below
the operating one to avoid incorrect functioning of
microprocessor;
generation of reset signal when pushing reset button;
possibility to program threashold voltage
at which reset signal is generated.
ORDERING INFORMATION
IL1705N Plastic
IL1705D
SOIC
TA = -40 to 85 C for all packages.
The IN1705 contains a source of reference voltage,
two analog comparators, watchdog timer, digital sampler,
digital delay.
Functions:




generation of reset signal per fixed level of supply
voltage;
generation of reset signal from external “Reset” button;
generation of signal of watchdog timer status;
emergency interruption of primary power source.
PBRST 1
8
WDS
7
RST
3
6
ST
IN 4
5
NMI
1
1
Vcc 21
GND
Fig. 2 – Pin assignment
2011, February, Rev. 01
IN1705
Industrial temperature range
Industrial temperature range - 40С to + 85С.
Table 1 – Recommended operating conditions
Symbol
Parameter
VСС
Supply voltage
VIH
VIL
ТA
Input voltage, high level
Input voltage, low level
Operating temperature range
Typical
Units
min
max
1.2
5.5
V
2.0
-0.03
-40
VСС+0.3
0.5
85
V
V
С
Table 2 – Absolute maximum ratings
Symbol
Parameter
Typical
Units
min
max
VСС
Supply voltage
-0.5
7.0
V
VIH
VIL
Tstg
Input voltage, high level
Input voltage, low level
Storage temperature
-0.5
-60
VСС+0.5
125
V
V
С
Exposure to absolute maximum rating conditions may affect reliability of IC and its functional operation.
Upon removing the absolute maximum ratings conditions, functional operation is guaranteed in recommended operating
conditions.
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
2011, February, Rev. 01
IN1705
Table 3 – DC electrical characteristics (TA = - 40 to + 85С)
Symbol
VIL
VIH
IOL
IOH
IOH1
VOH
ILIL1
ILIL2
ILIL3
ILIH
IСС
VCCTP
VTP
Parameter
Input voltage, low level
Typical
Test conditions
VСС=from 2.4 to 5.5V
Input voltage, high level
VСС=from 2.4 to 5.5V
Output current, low
VСС=from 2.4 to 5.5V
level (NMI, RST)
VOL= 0.4V
Output current, high
VСС=from 4.5 to 5.5V
level (WDS, NMI)
VOH= 2.4V
Output current, high
VCC =from 5.0 to 5.5V
level, (RST)
VOH=2.4V
Output voltage, high level VСС=from 5.0 to 5.5V
(RST)
IOH= -500мкА
Input leakage current,
VСС=from 1.2 to 5.5V
low level (IN)
VIL= 0 V
Input leakage current,
VСС= 5.5V
low level (ST)
VIL= 0 V
Input leakage current,
VСС= 5.5V
low level (PBRST)
VIL= 0 V
Input leakage current,
VСС=from 1.2 to 5.5V
high level
VIH = VСС
Operating current
VСС=from 1.2 to 5.5V
VIL=0 V, VIH=VCC
VCC trip point
VIL= 0 V, VIH=VCC
IN input trip point
VСС=5.0 V
VIL= 0 V, VIH=VCC
Units
min
max
2.0
10.0
0.5
-
V
V
mA
-100
-1000
A
-10
-
mA
VСС-0.3
-
V
-
-1.0
A
-10
-100
A
-50
-450
A
-
1.0
A
-
60
A
4.5
1.2
4.75
1.3
V
V
2011, February, Rev. 01
IN1705
Table 4 – AC electrical characteristics (VСС= 5.0 V, ТA = - 40 to + 85С)
Symbol
Parameter
Typical
Units
min
max
Watchdog timeout
PBRST stable low to RST and RST
Reset active time
VСС detect to RST and RST
VСС detect to RST and RST
VIN detect to NMI
1.0
130
130
-
2.2
250
285
8.0
285
8.0
s
ns
ms
s
ms
s
tPB
(PBRST= VIL)
150
-
ns
tST
ST Pulse Width
10
-
ns
tTD
tPDLY
tRST
tRPD
tRPU
tIPD
2011, February, Rev. 01
IN1705
Timing diagrams
tPB
______
PBRST
tPDLY
VIH
VIL
tRST
____
RST
VOH
Fig. 3 – Timing diagram of forming reset signal from external PBRST control button
___
ST
Invalid
strobe
t ST
Valid
strobe
Indeterminate
strobe
MIN
MAX
t TD
____
WDS
Reset initiated
by pushbutton
___
RST
Fig. 4 – Timing diagram: strobe input
2011, February, Rev. 01
IN1705
tF
VCC
VCCTP (MAX)
VCCTP
VCCTP (MIN)
t RPD
____
RST
V OL
____
WDS
____
WDS slews with VCC
Fig. 5 – Timing diagram: power down to VCCTP
2011, February, Rev. 01
IN1705
tR
VCCTP (MAX)
VCCTP
VCCTP (MIN)
VCC
t RPU
V OH
____
RST
____
WDS
Fig. 6 – Timing diagram: Power-Up
2011, February, Rev. 01
IN1705
V I > 1,25 B
VTP (MAX)
VTP
VTP (MIN)
t IPD
VTP (MIN)
VTP (MAX)
VTP
t IPD
____
NMI
VOH
V OL
Fig. 7 – Timing diagram: Non-Maskable Interrupt
2011, February, Rev. 01
IN1705
IN
Digital
Sampler
+
Reference
voltage source
-
Digital
Sampler
Vcc
____
NMI
+
______
PBRST
Digital
delay
____
RST
Watchdog
Timer
____
WDS
Schmitt
Trigger
__
ST
GND
Fig. 8 – Block Diagram
Table 5 – Pin description
Pin
Symbol
Description
01
PBRST
02
Vcc
Power supply
-
03
GND
Ground
-
04
IN
05
NMI
Non-maskable interrupt
Output
06
ST
Watchdog timer strobe
Input
07
RST
Active low reset
Output
08
WDS
Watchdog status
Output
Pushbutton reset input
Input
Type
Input
Input
2011, February, Rev. 01
IN1705
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
8
B
1
4
F
Symbol
MIN
MAX
A
8.51
10.16
B
6.1
7.11
C
L
C
5.33
D
0.36
0.56
F
1.14
1.78
-T- SEATING
PLANE
N
G
M
K
0.25 (0.010) M
J
H
D
T
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
G
2.54
H
7.62
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
A
8
5
B
H
1
G
P
4
D
K
MIN
MAX
A
4.8
5
B
3.8
4
C
1.35
1.75
D
0.33
0.51
F
0.4
1.27
R x 45
C
-T-
Symbol
SEATING
PLANE
J
F
0.25 (0.010) M T C M
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B ‑ 0.25 mm (0.010) per side.
M
G
1.27
H
5.72
J
0°
8°
K
0.1
0.25
M
0.19
0.25
P
5.8
6.2
R
0.25
0.5
2011, February, Rev. 01