Rainbow-electronics DS1215 Manual do Utilizador descarregar pdf (Página 8)

DS1215

032697 8/15

AC ELECTRICAL CHARACTERISTICS ROM/RAM = GND (0°C to 70°C; V

= 4.5 to 5.5V)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Read Cycle Time t

120 ns

CEI Access Time t

100 ns

OE Access Time t

100 ns

CEI to Output Low Z t

COE

10 ns

OE to Output Low Z t

OEE

10 ns

CEI to Output High Z t

40 ns

OE to Output High Z t

ODO

40 ns

Read Recovery t

20 ns

Write Cycle t

120 ns

Write Pulse Width t

100 ns

Write Recovery t

20 ns 4

Data Setup t

40 ns 5

Data Hold Time t

10 ns 5

CEI Pulse Width t

100 ns

RST Pulse Width t

RST

200 ns

CEI Propagation Delay t

5 10 20 ns 2, 3

CEI High to Power–Fail t

0 ns

AC ELECTRICAL CHARACTERISTICS ROM/RAM = GND (0°C to 70°C; V

> 4.5V)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Recovery at Power–Up t

REC

2 ms

Slew Rate 4.5 – 3.0V t

0 ms

CAPACITANCE (t

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Capacitance C

5 10 pF

Output Capacitance C

OUT

5 10 pF

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Phantom Time Chip 1
OPERATION 2
TIMING BLOCK DIAGRAM Figure 1 2
OSCILLATOR AND RESET BITS 4
ZERO BITS 4
AM–PM/12/24 MODE 4
°C to 70°C) 7
°C to 70°C; V 7
TIMING DIAGRAM: POWER DOWN 12
TIMING DIAGRAM: POWER UP 12
OUTPUT LOAD Figure 6 13
DS1215 TIME CHIP 14
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