DS1284_06 Datasheet, PDF (10/18 Pages) Dallas Semiconductor – Watchdog Timekeepers

DS1284/DS1286
CAPACITANCE
(T_A = +25°C)
PARAMETER
Input Capacitance
Output Capacitance
Input/Output Capacitance
SYMBOL
C_IN
C_OUT
C_I/O
MIN
TYP
7
7
7
MAX
10
10
10
UNITS
pF
pF
pF
NOTES
AC ELECTRICAL CHARACTERISTICS
(V_CC = 4.5V to 5.5V, T_A = -40°C to +85°C or 0°C to +70°C.)
PARAMETER
SYMBOL MIN
Read Cycle Time
t_RC
150
Address Access Time
CE Access Time
OE Access Time
OE or CE to Output Active
t_ACC
t_CO
t_OE
t_COE
10
Output High-Z from Deselect
t_OD
Output Hold from Address Change
t_OH
10
Write Cycle Time
t_WC
150
Write Pulse Width
t_WP
140
Address Setup Time
t_AW
0
Write Recovery Time
Output High-Z from WE
Output Active from WE
t_WR
10
t_ODW
t_OEW
10
Data Setup Time
t_DS
45
Data Hold Time
INTA, INTB Pulse Width
t_DH
0
t_IPW
3
TYP
MAX
150
150
60
60
50
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
NOTES
1
3
4
4,5
11,12
10 of 18