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SM8580 Datenblatt(PDF) 1 Page - Nippon Precision Circuits Inc

Teilenummer SM8580
Bauteilbeschribung  Real-time Clock IC with 4-bit Interface and Built-in Temperature Sensor
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Hersteller  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

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SM8580AM
NIPPON PRECISION CIRCUITS—1
NIPPON PRECISION CIRCUITS INC.
Real-time Clock IC with 4-bit Interface
and Built-in Temperature Sensor
OVERVIEW
The SM8580AM is a real-time clock IC based on a 32.768 kHz crystal oscillator, which features a 4-bit paral-
lel interface for communication with an external microcontroller.
It comprises second-counter to year-counter clock and calendar circuits that feature automatic leap-year adjust-
ment up to year 2099, alarm and timer interrupt functions, clock counter change detect functions, ±30-second
correction function, time error correction function, and built-in temperature sensor.
The 4-bit parallel interface is compatible with general-purpose SRAM over a high-speed bus.
FEATURES
s
High-speed bus 4-bit parallel interface
s
Date, day, hour, minute, and second-counter pre-
settable alarm interrupt
s
1/4096 seconds to 255 minutes presettable interval
timer interrupt function
s
2 software-maskable alarm and timer interrupt
outputs
s
Clock counter change detect functions
s
4-digit western calendar display
s
Automatic leap year correction up to year 2099
s
±30-second adjust function
s
−195 to +192ppm time error correction range
s
Built-in temperature sensor (analog voltage out-
put)
s
2.4 to 5.5V interface voltage range
s
1.6 to 5.5V clock voltage range
s
0.6µA/3V (typ) current consumption
ORDERING INFORMATION
PINOUT
(Top view)
D e vice
P a ck ag e
SM8580AM
24-pin SSOP
1
13
24
12
CE0N
FCON
FOUT
VTEMP
AIRQN
TIRQN
A0
VDD
XT
XTN
N.C.
N.C.
N.C.
CE1
A1
A2
A3
RDN
VSS
D0
D1
D2
D3
WRN


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