LM81CIMT-3/NOPB National Semiconductor, LM81CIMT-3/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM81CIMT-3/NOPB
• Description: IC MONITOR SYS HARDWAR 24-TSSOP
• Manufacturer: National Semiconductor

Specifications of LM81CIMT-3/NOPB

• Function: Hardware Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.8 V ~ 3.8 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Supply Voltage Range: 2.8V To 3.8V
• Reset Type: Active-Low
• Supply Current: 1.4mA
• Digital Ic Case Style: TSSOP
• No. Of Pins: 24
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• Monitored Voltage: 2.5 V , 3.3 V , 5 V , 12 V
• Manual Reset: Not Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No
• Supply Voltage (max): 3.8 V
• Supply Voltage (min): 2.8 V
• Supply Current (typ): 400 uA (Typ)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM81CIMT-3; *LM81CIMT-3/NOPB; LM81CIMT-3

www.national.com
SERIAL BUS TIMING CHARACTERISTICS
AC Electrical Characteristics
The following specifications apply for +2.8V
face limits apply for T
t
Symbol
TIMEOUT
t
t
C
rise
t
fall
t
t
t
t
1
2
3
4
5
L
SMBCLK (Clock) Period
SMBCLK and SMBData Rise Time
SMBCLK and SMBData Fall Time
Data In Setup Time to SMBCLK High
Data Out Stable After SMBCLK Low
SMBData Low Setup Time to SMBCLK Low
(start)
SMBData High Hold Time After SMBCLK
High (stop)
SMBData or SMBCLK low time required to
reset the Serial Bus Interface to the Idle
State
Capacitive Load on SMBCLK and SMBData
A
= T
J
= T
MIN
Parameter
to T
MAX
FIGURE 1. Serial Bus Timing Diagram
DC
; all other limits T
V
+
+3.8V
DC
8
on SMBCLK and SMBData, unless otherwise specified. Bold-
A
= T
Conditions
J
= 25˚C. (Note 15)
(Note 9)
Typical
31
(Note 10)
Limits
300
100
100
100
400
2.5
25
35
1
0
DS100072-4
ms (max)
pF (max)
µs (max)
ns (max)
ms (min)
µs (min)
ns (min)
ns (min)
ns (min)
ns (min)
(Limits)
Units
ms