Maxim DS87C530 Clock User Manual

Open as PDF

of 47

DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock

34 of 47

DC ELECTRICAL CHARACTERISTICS (continued)

= 4.5V to 5.5V, T

= -40°C to +85°C.)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Leakage Port 0, EA, Pins, I/O Mode

-10 +10

Input Leakage Port 0, Bus Mode

-300 +300

RST Pulldown Resistance

RST

50 200

Note 1: Storage temperature is defined as the temperature of the device when V

= 0V and V

BAT

= 0V. In this state, the contents of

SRAM are not battery backed and are undefined.

Note 2:

All parameters apply to both commercial and industrial temperature operation unless otherwise noted.

Note 3:

All voltages are referenced to ground.

Note 4:

Active current measured with 33MHz clock source on XTAL1, V

= RST = 5.5V, other pins disconnected.

Note 5:

Idle mode current measured with 33MHz clock source on XTAL1, V

= 5.5V, RST at ground, other pins disconnected.

Note 6:

Stop mode current measured with XTAL1 and RST grounded, V

= 5.5V, all other pins disconnected.

Note 7:

= 0V, V

BAT

= 3.3V. 32.768kHz crystal with 12.5pF load capacitance between RTCX1 and RTCX2 pins. RTCE bit set to 1.

Note 8: RST = V

. This condition mimics operation of pins in I/O mode. Port 0 is tri-stated in reset and when at a logic high state during

I/O mode.

Note 9: During a 0-to-1 transition, a one-shot drives the ports hard for two clock cycles. This measurement reflects port in transition

mode.

Note 10:

When addressing external memory. This specification only applies to the first clock cycle following the transition.

Note 11: This is the current required from an external circuit to hold a logic low level on an I/O pin while the corresponding port latch bit is

set to 1. This is only the current required to hold the low level; transitions from 1 to 0 on an I/O pin will also have to overcome the

transition current.

Note 12:

Ports 1, 2, and 3 source transition current when being pulled down externally. It reaches its maximum at approximately 2V.

Note 13:

0.45 < V

< V

. RST = V

. This condition mimics operation of pins in I/O mode.

Note 14: 0.45 < V

< V

. Not a high-impedance input. This port is a weak address holding latch in Bus Mode. Peak current occurs near

the input transition point of the latch, approximately 2V.

TYPICAL I

vs. FREQUENCY

WWW.100Y.COM.TW WWW.100Y.COM.TW WWW.100Y.COM.TW

previous next

Top Automotive Device Types

Top Automotive Brands

Top Baby Care Device Types

Top Baby Care Brands

Top Car Audio & Video Device Types

Top Car Audio & Video Brands

Top Cellphone Device Types

Top Cellphone Brands

Top Communications Device Types

Top Communications Brands

Top Computer Device Types

Top Computer Brands

Top Fitness Device Types

Top Fitness Brands

Top Home Audio Device Types

Top Home Audio Brands

Top Household Appliance Device Types

Top Household Appliance Brands

Top Kitchen Appliance Device Types

Top Kitchen Appliance Brands

Top Laundry Appliance Device Types

Top Laundry Appliance Brands

Top Lawn & Garden Device Types

Top Lawn & Garden Brands

Top Marine Equipment Device Types

Top Marine Equipment Brands

Top Musical Instrument Device Types

Top Musical Instrument Brands

Top Outdoor Cooking Device Types

Top Outdoor Cooking Brands

Top Personal Care Device Types

Top Personal Care Brands

Top Photography Device Types

Top Photography Brands

Top Portable Media Device Types

Top Portable Media Brands

Top Power Tools Device Types

Top Power Tools Brands

Top TV and Video Device Types

Top TV and Video Brands

Top Videogame Device Types

Top Videogame Brands

Maxim DS87C530 Clock User Manual