Rainbow Electronics DS1677 - Manual (Page 13)

DS1677
13 of 17
CAPACITANCE (t
A
=25 °C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
I
10 pF
I/O Capacitance C
I/O
15 pF
Crystal Capacitance C
X
6 pF
AC ELECTRICAL CHARACTERISTICS (0 °C to 70°C; V
CC
=5.0V ±10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Data to Clock Setup t
DC
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
CL
250 ns 6
CLK to High Time t
CH
250 ns 6
CLK Frequency t
CLK
2.0 MHz 6
CLK Rise and Fall t
R
, t
F
500 ns
CS to CLK Setup t
CC
1 µs 6
CLK to CS Hold t
CCH
60 ns 6
CS Inactive Time t
CWH
1 µs 6
CS to I/O High-Z t
CDZ
70 ns 6
V
CC
Slew Rate (4.5V to 2.3V) t
F
1 ms
V
CC
Slew Rate (2.3V to 4.5V) t
R
0 ns
V
CC
Detect to RST (V
CC
Falling) t
RPD
100 ns
Reset Active Time t
RST
250 ms 13
Pushbutton Debounce PB
DB
250 ms 13
V
CC
Detect to RST (V
CC
Rising) t
RPU
250 ms 13, 14
ST Pulse Width t
ST
20 ns
Chip Enable Propagation Delay to
External SRAM t
CED
8 15 ns
Nominal Voltage to V
CC
Switchover
Fall Time
t
FB
200 µs
PFI Low to PFO Low t
PFD
2 µs
PFI High to PFO High t
PFU
2 µs