Datasheet

DS1670
13 of 16
AC ELECTRICAL CHARACTERISTICS (V
CC
= 3.3V ±10%, T
A
= 0C to +70C.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Data to Clock Setup t
DC
100 ns 8
CLK to Data Hold t
CDH
140 ns 8
CLK to Data Delay t
CDD
400 ns 8, 9, 10
CLK to Low Time t
CL
500 ns 8
CLK to High Time t
CH
500 ns 8
CLK Frequency t
CLK
1.0 MHz 8
CLK Rise and Fall t
R,
t
F
1000 ns
CS to CLK Setup
t
CC
2
s
8
CLK to CS Hold t
CCH
120 ns 8
CS Inactive Time
t
CWH
2
s
8
CS to I/O High-Z t
CDZ
140 ns 8
SCLK to I/O High-Z t
CCZ
140 ns 8
V
CC
Slew Rate (2.85V to
2.3V)
t
F
300
s
V
CC
Slew Rate (2.3V to
2.85V)
t
R
0 ns
V
CC
Detect to
RST
(V
CC
Falling)
t
RPD
100 ns
Reset Active Time t
RST
250 ms 15
Pushbutton Debounce PB
DB
250 ms 15
V
CC
Detect to RST
(V
CC
Rising)
t
RPU
250 ms 15, 16
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
s