BD87A28FVM-TR Rohm Semiconductor, BD87A28FVM-TR Datasheet - Page 3

• Manufacturer Part Number: BD87A28FVM-TR
• Description: IC, VOLTAGE DETECTION, MSOP8
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Watchdog Circuitr

Specifications of BD87A28FVM-TR

• Threshold Voltage: 2.8V
• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 1V To 10V
• Reset Type: Active-Low
• Supply Current: 5µA
• Digital Ic Case Style: MSOP
• No. Of Pins: 8
• Operating Temperature: RoHS Compliant
• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 2.8V
• Mounting Type: Surface Mount
• Package / Case: 8-VSSOP, 8-MSOP (0.110", 2.80mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●Electrical characteristics (Unless otherwise specified, Ta = −40℃ to 105℃, VDD = 5 V)
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[Overall]
Total supply current 1
(during WDT operation)
Total supply current 2
(when WDT stopped)
Output leak current
Output current capacity
[RESET]
Detection
voltage 1
Detection
voltage 2
Hysteresis
width
RESET transmission
delay time: low  high
Delay circuit resistance
Delay pin threshold voltage
Delay pin output current
Min. operating voltage
[WDT]
WDT monitor time
WDT reset time
Clock input pulse width
CLK high threshold voltage
CLK low threshold voltage
CLK high threshold voltage
CLK low threshold voltage
CTW charge current
CTW discharge current
*1
*2
*3
○
TPLH can be varied by changing the CT capacitance value.
TPLH (s)  0.69 × Rrst (MΩ) × CT (µF) Rrst = 10 MΩ
TwH can be varied by changing the CT capacitance value.
TwH (s)  (0.5 × CTW (µF))/ICTWC (µA) ICTWC = 0.5 µA
TwL can be varied by changing the CTW capacitance value.
TwL (s)  (0.5 × CTW (µF))/ICTWO (µA) ICTWO = 1.5 µA
Note: This IC is not designed to be radiation-resistant.
Parameter
1.9V Detect
2.8V Detect
2.9V Detect
3.4V Detect
4.1V Detect
1.9V Detect
2.8V Detect
2.9V Detect
3.4V Detect
4.1V Detect
1.9V Detect
2.8V Detect
2.9V Detect
3.4V Detect
4.1V Detect
TWCLK
Symbol
VCLKH
ICTWO
VDET1
VDET1
VDET1
VDET1
VDET1
VDET2
VDET2
VDET2
VDET2
VDET2
VCLKL
ICTWC
VINHH
VINHL
VCTH
VOPL
Vrhys
Vrhys
Vrhys
Vrhys
Vrhys
TPLH
IDD1
IDD2
Ileak
TwH
Rrst
TwL
IOL
ICT
VDET × 0.018 VDET × 0.045 VDET × 0.060
VDET × 0.018 VDET × 0.035 VDET × 0.050
VDET × 0.03 VDET × 0.13 VDET × 0.19
VDET × 0.02 VDET × 0.05 VDET × 0.06
VDET × 0.02 VDET × 0.05 VDET × 0.07
VDD × 0.3
VDD × 0.8
VDD × 0.8
1.871
2.758
2.886
3.349
4.039
1.852
2.730
2.857
3.315
4.007
Min.
0.25
0.75
150
500
0.7
3.9
5.8
1.0
7.0
2.4
—
—
—
0
0
VDD × 0.45
3/10
Limits
1.900
2.800
2.930
3.400
4.100
1.900
2.800
2.930
3.400
4.100
10.0
(Typ.)
(Typ.)
(Typ.)
Typ.
10.0
0.50
1.50
6.9
3.3
—
—
—
—
—
—
—
—
—
5
5
VDD × 0.6
VDD × 0.3
VDD × 0.3
1.929
2.842
2.974
3.451
4.162
1.948
2.870
3.003
3.485
4.202
Max.
VDD
VDD
10.1
14.5
20.0
0.75
2.00
7.0
14
14
—
—
—
—
1
Unit
MΩ
mA
µA
µA
µA
ms
µA
ms
ms
µA
µA
ns
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
INH : WDT ON Logic Input
CTW = 0.1 µF
INH : WDT OFF Logic Input
VDD = VDS = 10 V
VDD = 1.2 V, VDS = 0.5 V
Ta = 25℃
Ta = 25℃
Ta = 25℃
Ta = 25℃
Ta = 25℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
Ta = −40 to 105℃
CT = 0.001 µF
When VDD = VDET 0.5 V
VCT = GND
RL = 470 KΩ
VDD = 1.50 V, VCT = 0.5 V
VOL ≤ 0.4 V, RL = 470 KΩ
CTW = 0.01 µF
CTW = 0.01 µF
VCTW = 0.2 V
VCTW = 0.8 V
Conditions
Technical Note
2010.12 - Rev.A
*1
*2
*3