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Details, datasheet, quote on part number:UPD4992
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Datasheet text preview:
PRELIMINARY DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4992
8-Bit Parallel I/O Calendar Clock
The µPD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in which a microprocessor is employed. The µPD4992 operates at 32.768 kHz and provides year, month, day of month, day of week, hour, minute, and second data to a system. The µPD4992 internally contains a voltage regulator so that low power consumption operation and high accuracy are realized even if the supply voltage varies. The µPD4992 uses the 8-bit bus to facilitate interfacing with a microprocessor.
FEATURES:
· Internal counter for time (hour, minute, second), and calendar (leap year, year, month, day of month, day of week) · Super low power consumption (IDD = 2 µA MAX. at VDD = 2.4 V) · Automatic determination of leap year, manual setting possible · 12 hour/24 hour mode selectable · 8-bit parallel input/output in BCD data format · 12 kinds of interval timer output (can be used as watchdog timer) · Internal voltage detection circuit for automatic determination of battery run-down · High accuracy
ORDERING INFORMATION:
Order Code Package 20-pin plastic DIP (300 mil) 20-pin plastic SOP (300 mil) 20-pin plastic SOP (300 mil) Provided on adhesive tape 20-pin plastic SOP (300 mil) Provided on embossed carrier tape
µP D 4 9 9 2 C X µP D 4 9 9 2 G S µPD4992GS-T1, T2 µP D 4 9 9 2 G S - E 2
The information in this document is subject to change without notice. Document No. ID-3084 (1st edition) (O.D. No. ID-8222) Date Published March 1997 P Printed in Japan
©
5 1992
µPD4992
PIN CONFIGURATION
TP
1
20
VDD
CS1
2
19
XIN
WR
3
18
XOUT
A0
4
17
CS2
A1
5
16
D7
A2
6
15
D6
RD
7
14
D5
D0
8
13
D4
D1
9
12
D3
VSS
10
11
D2
BLOCK DIAGRAM
OSC 15 Stage Binary Divider Time Counter
t Day of he week
Second
Minute
Time
XOUT
Clock Stop
Day
CS1 CS2 TP Generator
TP
RD
WR
8 D0 to D7
Data Bus Controller
Mode Registor Control Registor
3 A0 to A2
Address Bus Controller
D Address ecoder
2
Year
XIN
1 / 215
Month
µPD4992
ABSOLUTE MAXIMUM RATINGS (VSS = 0 V)
Item Supply voltage Input voltage range Output pin withstand voltage Low level output current (N ch Open Drain) Operating temperature range Storage temperature range Symbol VD D VI N VO U T IOUT Topt Tstg Ratings 0.3 to 7.0 0.3 to VDD + 0.3 7.0 30 40 to +85 65 to +125 Unit V V V mA °C °C
ELECTRICAL CHARACTERISTICS (VSS = 0 V, f = 32.768 kHz, CG = CD = 20 pF, Ci = 20k ohms, Ta = 40 to +85 °C)
Item Operating voltage range High level input voltage Low level input voltage Supply current Supply current Input leakage current High level output voltage Low level output voltage Low level output voltage High level leakage current Symbol VD D VI H VI L IDD IDD IL I V OH V OL1 V OL2 IL O H VDD = 5.5 V, VIN = VSS VDD = 2.4 V, VIN = VSS VDD = 5.5 V, VIN = VDD or VSS IOH = 1.0 mA IOL = 2.0 mA IOL = 1.0 mA (N ch Open Drain) TPout = VDD (N ch Open Drain) 4 × 105 2.4 Condition MIN. 2.4 0.7 VDD V SS 2 0.6 ±1 × 105 4.3 0.1 0.4 0.4 1.0 TYP.* MAX. 5.5 VDD 0.3 VDD 6 2 ± 1.0 Unit V V V
µA µA µA
V V V
µA
*: Ta = +25 °C
SWITCHING CHARACTERISTICS
WRITE CYCLE (unless otherwise specified VDD = 5 V ± 10 %, Ta = 40 to +85 °C)
Item Cycle time CS-WR reset time Address - WR reset time Address - WR set up time Write pulse width Address hold time Input data set up time Input data hold time WR - output floating time Symbol t WC t CW tAW tAS t WP t WR t DW tD H t WHZ Condition MIN. 150 120 120 0 90 20 50 0 50 ns TYP. MAX. Unit
3
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