Rainbow-electronics AT77C105A Bedienungsanleitung PDF herunterladen (Seite 8)

AT77C105A [Preliminary]

5419A–BIOM–01/05

Switching Performances

The following characteristics are applicable to the operating temperature -40°C ≤ T ≤ +85°C.

Typical conditions are: nominal value; T

amb

= 25°C; F

SCK

= 12 MHz; duty cycle = 50%; C

LOAD

120 pF in digital output unless

specified otherwise.

Note: 1. T

SCK

= 1/F

CTRL

(clock period)

Note: All power supplies = +3.3V

Note: All power supplies = +2.5V

Table 12. Timings

Parameter Symbol Test Level Min Typ Max Unit

Clock frequency acquisition

mode

ACQ

IV 8 16 MHz

Clock frequency navigation

mode and chip control

CTRL

I- 0.2MHz

Duty cycle (clock SCK) DC IV 20 50 80 %

Reset setup time T

RSTSU

I½ T

SCK

(1)

Slave select setup time T

SSSU

I½ T

SCK

(1)

Slave select hold time T

SSHD

I½ T

SCK

(1)

Table 13. 3.3V ±10% Power Supply

Parameter Symbol Test Level Min Typ Max Unit

Data in setup time T

IV 3 ns

Data in hold time T

IV 1 ns

Data out valid T

I30ns

Data out disable time from SS

high

DIS

IV 3.8 ns

IRQ hold time T

IRQ

IV 3 µs

Table 14. 2.5V ±5% Power Supply

Parameter Symbol Test Level Min Typ Max Unit

Data in setup time T

IV 3 ns

Data in hold time T

IV 1 ns

Data out valid T

I30ns

Data out disable time from SS

high

DIS

IV 3.8 ns

IRQ hold time T

IRQ

IV 3 µs

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 38 39

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