Capacitance (t, 25 °c), Ac electrical characteristics (0 °c to 70°c; v – Rainbow Electronics DS1677 User Manual
Page 13: 0v ±10%)
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