DS12885N datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > semiconductor> The embedded processor and controller> DS12885N

DS12885N: Description1 TIMER(S), REAL TIME CLOCK, PDIP24; Categorysemiconductor The embedded processor and controller; File Size128KB，4 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

Download Datasheet Compare View All

DS12885N Online Shopping

Suppliers	Part Number	Price	MOQ	In stock
	DS12885N	-	-	View	Buy Now

DS12885N Overview

1 TIMER(S), REAL TIME CLOCK, PDIP24

Preview

Download Datasheet

View All

www.maxim-ic.com

DS12885/DS12885Q/DS12885T

Real-Time Clock

PIN ASSIGNMENT (Top View)

DS12885, 24 DIP

DS12885S, 24 SO 300mil

www.maxim-ic.com

FEATURES

Drop- in replacement for IBM AT computer

clock/calendar

Pin configuration closely matches

MC146818B and DS1285

Counts seconds, minutes, hours, days, day of

the week, date, month, and year with leap-

year compensation valid up to 2100

Binary or BCD representation of time,

calendar, and alarm

12-hour or 24-hour clock with AM and PM in

12-hour mode

Daylight Savings Time option

Selectable between Motorola and Intel bus

timing

Multiplex bus for pin efficiency

Interfaced with software as 128 RAM

locations

14 bytes of clock and control registers

114 bytes of general purpose RAM

Programmable square-wave output signal

bus-compatible interrupt signals (

IRQ

)

Three interrupts are separately software-

maskable and testable

Time-of-day alarm once/second to once/day

Periodic rates from 122µs to 500ms

End-of-clock update cycle

Optional 28-pin PLCC surface mount package

or 32-pin TQFP

Optional industrial temperature range

available

Underwriters Laboratory (UL) recognized

DS12885Q

28 PLCC

DS12885T

32 TQFP

Package Dimension Information

http://www.maxim-ic.com/TechSupport/DallasPackInfo.htm

Note:

Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here:

http://www.maxim-ic.com/errata.

1 of 6

072902

DS12885N Related Products

	DS12885N	DS12885	DS12885Q	DS12885Q/TR	DS12885S	DS12885T	DS12885QN	DS12885T/TR	DS12885TN
Description	1 TIMER(S), REAL TIME CLOCK, PDIP24	1 TIMER(S), REAL TIME CLOCK, PDIP24	1 TIMER(S), REAL TIME CLOCK, PQCC28	Real-Time Clock	1 TIMER(S), REAL TIME CLOCK, PDSO24	1 TIMER(S), REAL TIME CLOCK, PQFP32	1 TIMER(S), REAL TIME CLOCK, PQCC28	Real-Time Clock	1 TIMER(S), REAL TIME CLOCK, PDIP24
Is it Rohs certified?	-	incompatible	incompatible	-	incompatible	incompatible	incompatible	-	-
Maker	-	DALLAS	DALLAS	DALLAS	DALLAS	DALLAS	DALLAS	DALLAS	-
package instruction	-	DIP-24	PLASTIC, LCC-28	-	SOIC-24	TQFP-32	PLASTIC, LCC-28	-	-
Reach Compliance Code	-	unknow	unknown	unknown	unknown	unknown	unknown	unknown	-
Other features	-	DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING	DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING	-	DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING	DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING	DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING	-	-
External data bus width	-	8	8	-	8	8	8	-	-
Information access methods	-	PARALLEL, MUXED BUS	PARALLEL, MUXED BUS	-	PARALLEL, MUXED BUS	PARALLEL, MUXED BUS	PARALLEL, MUXED BUS	-	-
interrupt capability	-	Y	Y	-	Y	Y	Y	-	-
JESD-30 code	-	R-PDIP-T24	S-PQCC-J28	-	R-PDSO-G24	S-PQFP-G32	S-PQCC-J28	-	-
JESD-609 code	-	e0	e0	-	e0	e0	e0	-	-
Number of terminals	-	24	28	-	24	32	28	-	-
Number of timers	-	1	1	-	1	1	1	-	-
On-chip data RAM width	-	8	8	-	8	8	8	-	-
Maximum operating temperature	-	70 °C	70 °C	-	70 °C	70 °C	85 °C	-	-
Maximum output clock frequency	-	0.008192 MHz	0.008192 MHz	-	0.008192 MHz	0.008192 MHz	0.008192 MHz	-	-
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	-
encapsulated code	-	DIP	QCCJ	-	SOP	QFP	QCCJ	-	-
Encapsulate equivalent code	-	DIP24,.6	LDCC28,.5SQ	-	SOP24,.4	TQFP32,.35SQ,32	LDCC28,.5SQ	-	-
Package shape	-	RECTANGULAR	SQUARE	-	RECTANGULAR	SQUARE	SQUARE	-	-
Package form	-	IN-LINE	CHIP CARRIER	-	SMALL OUTLINE	FLATPACK	CHIP CARRIER	-	-
power supply	-	5 V	5 V	-	5 V	5 V	5 V	-	-
Certification status	-	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	-	-
RAM (number of words)	-	114	114	-	114	114	114	-	-
Maximum supply voltage	-	5.5 V	5.5 V	-	5.5 V	5.5 V	5.5 V	-	-
Minimum supply voltage	-	4.5 V	4.5 V	-	4.5 V	4.5 V	4.5 V	-	-
Nominal supply voltage	-	5 V	5 V	-	5 V	5 V	5 V	-	-
surface mount	-	NO	YES	-	YES	YES	YES	-	-
technology	-	CMOS	CMOS	-	CMOS	CMOS	CMOS	-	-
Temperature level	-	COMMERCIAL	COMMERCIAL	-	COMMERCIAL	COMMERCIAL	INDUSTRIAL	-	-
Terminal surface	-	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	-	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	-	-
Terminal form	-	THROUGH-HOLE	J BEND	-	GULL WING	GULL WING	J BEND	-	-
Terminal pitch	-	2.54 mm	1.27 mm	-	1.27 mm	0.8 mm	1.27 mm	-	-
Terminal location	-	DUAL	QUAD	-	DUAL	QUAD	QUAD	-	-
shortest time	-	SECONDS	SECONDS	-	SECONDS	SECONDS	SECONDS	-	-
Volatile	-	YES	YES	-	YES	YES	YES	-	-
uPs/uCs/peripheral integrated circuit type	-	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	-	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	-	-
Base Number Matches	-	-	1	1	1	1	1	1	-

Recommended Resources

Alarm circuit of a typical electromagnetic stove

Current transformer secondary open circuit alarm circuit

Voice controlled music generator circuit

Automobile cab delayed lighting control circuit

Motor overheat protector circuit diagram

Computer motherboard circuit diagram 810 3_34

Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

Popular Components