DS1670 Datasheet, PDF (13/16 Pages) Dallas Semiconductor – Portable System Controller

DS1670
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
CLK to High Time
t_CL
500
t_CH
500
ns
8
ns
8
CLK Frequency
t_CLK
CLK Rise and Fall
t_R, t_F
1.0
MHz
8
1000
ns
CS to CLK Setup
t_CC
2
ms
8
CLK to CS Hold
t_CCH
120
ns
8
CS Inactive Time
t_CWH
2
ms
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
ms
V_CC Slew Rate (2.3V to
2.85V)
t_R
0
ns
V_CC Detect to RST
(V_CC Falling)
Reset Active Time
Pushbutton Debounce
V_CC Detect to RST
(V_CC Rising)
ST Pulse Width
t_RPD
t_RST
PB_DB
t_RPU
t_ST
20
100
250
250
250
ns
ms
15
ms
15
ms
15, 16
ns
Chip Enable Propagation
Delay to External SRAM
t_CED
8
Nominal Voltage to V_CC
Switchover Fall Time
t_FB
200
15
ns
ms
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