Rainbow-electronics DS1677 Bedienungsanleitung PDF herunterladen (Seite 13)

DS1677

13 of 17

CAPACITANCE (t

=25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Capacitance C

10 pF

I/O Capacitance C

I/O

15 pF

Crystal Capacitance C

6pF

AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; V

=5.0V±10%)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Data to Clock Setup t

50 ns 6

CLK to Data Hold t

CDH

70 ns 6

CLK to Data Delay t

CDD

200 ns 6,7,8

CLK to Low Time t

250 ns 6

CLK to High Time t

250 ns 6

CLK Frequency t

CLK

2.0 MHz 6

CLK Rise and Fall t

, t

500 ns

CS to CLK Setup t

µs

CLK to CS Hold t

CCH

60 ns 6

CS Inactive Time t

CWH

µs

CS to I/O High-Z t

CDZ

70 ns 6

Slew Rate (4.5V to 2.3V) t

1ms

Slew Rate (2.3V to 4.5V) t

0ns

Detect to RST (V

Falling)

RPD

100 ns

Reset Active Time t

RST

250 ms 13

Pushbutton Debounce PB

250 ms 13

Detect to RST (V

Rising)

RPU

250 ms 13, 14

ST Pulse Width

20 ns

Chip Enable Propagation Delay to

External SRAM

CED

815 ns

Nominal Voltage to V

Switchover

Fall Time

200

µs

PFI Low to PFO Low

PFD

µs

PFI High to PFO High

PFU

µs

1 2 ... 8 9 10 11 12 13 14 15 16 17

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