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V3021SO8A, V3022 28S, V3023

Table of contents:
Info of V3021SO8A
Info of V3022 28S
Info of V3023

V3021SO8A, V3022 28S, V3023 Selling Leads, Datasheet

MFG:EM Package Cooled:27390+ D/C:14700

V3021SO8A, V3022 28S, V3023 Datasheet download

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Part Number: V3021SO8A

MFG: EM

Package Cooled: 27390+

D/C: 14700

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V3023 General Description

The V3023 is a low power CMOS real time clock with a built-in crystal. Standby current is typically 1.2mA and the access time is 50ns. The interface is 8 bits with multiplexed address and data bus. The input line A/D handles multiplexing of address and data. There are no busy flags in the V3023, internal time update cycles are invisible to the user’s software. Time data can be read from the V3023 in 12 or 24 hour data formats. An external signal puts the V3023 in standby mode. Even in standby, the V3023 pulls the IRQ pin active low on an internal alarm interrupt. Calendar functions include leap year correction and week number calculation. Time precision can be achieved by digital trimming. The V3023 can be synchronized to an external 50Hz signal or to the nearest second or minute.

V3023 Maximum Ratings

Paramete	Symbol	Conditions
Maximum voltage at V_DD	V_DDmax	V_SS + 7.0V
Max. voltage at remaining pins	V_max	V_DD + 0.3V
Min. voltage on all pins	V_min	V_SS 0.3V
Maximum storage temperature	T_STOmax	+125
Minimum storage temperature	T_STOmin	-55
Maximum electrostatic discharge to MIL-STD-883C method 3015.7 with ref. to V_SS	V_Smax	1000V
Maximum soldering conditions	T_Smax	250 x 10s
Shock resistance		5000 g. 0.3ms, ½ sine

Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliabilit or cause malfunction.

V3023 Features

` Built-in crystal with digital trimming and temperature compensation facilities
` Can be synchronised to 50 Hz or nearest s/min
` 50 ns access time with 50 pF load capacitance
` Standby on power down typically 1.2 A
` Universal interface compatible with both Intel and Motorola
` Simple 8 bit interface with no delays or busy flags
` 16 bytes of user RAM
` Power fail input disables during power up / down of reset
` Bus can be in tri-state in power fail mode
` Wide voltage range: 2.0 V to 5.5 V
` 12 or 24 hour data formats
` Time to 1/100 of a second
` Leap year correction and week number calculation
` Alarm and timer interrupts
` Programmable interrupts: 10 ms, 100 ms, s or min
` Sleep mode capability
` Alarm programmable up to one month
` Timer measures elapsed time up to 24 hours
` Temperature range: -40 to +85
` Package SO28

V3023 Typical Application

· Industrial controllers
· Alarm systems with periodic wake up
· PABX and telephone systems
· Point of sale terminals
· Automotive electronics

V3023 Connection Diagram

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