DS1670 Datasheet, PDF (14/17 Pages) Dallas Semiconductor – Portable System Controller

AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
Data to Clock Setup
t_DC
100
CLK to Data Hold
CLK to Data Delay
t_CDH
140
t_CDD
CLK to Low Time
CLK to High Time
t_CL
500
t_CH
500
CLK Frequency
t_CLK
CLK Rise and Fall
t_R, t_F
CS to CLK Setup
t_CC
2
CLK to CS Hold
t_CCH
120
CS Inactive Time
t_CWH
2
CS to I/O High Z
t_CDZ
SCLK to I/O High Z
t_CCZ
V_CC Slew Rate (2.85V to
t_F
300
2.3V)
V_CC Slew Rate (2.3V to
t_R
0
2.85V)
V_CC Detect to RST
t_RPD
(V_CC Falling)
Reset Active Time
Pushbutton Debounce
t_RST
PB_DB
V_CC Detect to RST
(V_CC Rising)
ST Pulse Width
t_RPU
t_ST
20
Chip Enable Propagation
t_CED
Delay to External SRAM
Nominal Voltage to V_CC
Switchover Fall Time
t_FB
200
DS1670
(0°C to 70°C; V_CC = 3.3V ± 10%)
TYP
MAX UNITS NOTES
ns
8
ns
8
400
ns
8, 9, 10
ns
8
ns
8
1.0
MHz
8
1000
ns
µs
8
ns
8
µs
8
140
ns
8
140
ns
8
µs
ns
100
ns
250
ms
15
250
ms
15
250
ms
15, 16
ns
8
15
ns
µs
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