DS1384 Datasheet, PDF (12/17 Pages) Dallas Semiconductor – Watchdog Timekeeping Controller

AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
Read Cycle Time
Address Access Time
CE Access Time
t_RC
120
t_ACC
t_CO
CE Data Off Time
t_CEZ
Output Enable Access
t_OE
Time
Output Enable Data
t_OEZ
Off Time
Output Enable to DQ
Low-Z
t_OEL
5
CE to DQ Low-Z
t_CEL
10
Output Hold from Address
t_OH
5
CE to CEO Low or High
t_CEPD
OE Low to OER Low
t_OERL
A0-A16 > 00040h
OE High to OER High
t_RO
Time
Address 00040h-1FFFFh
t_AOEL
to OER Low
Address 00000h-0003Fh to
t_AOEH
OER High
Write Cycle Time
Address Setup Time
CE Pulse Width
t_WC
120
t_AW
0
t_CEW
120
Address Hold from
End of Write
t_AH
10
Write Pulse Width
CE Data Off Time
t_WP
80
t_CEZ
WE Data Off Time
t_WEZ
WE or CE Inactive Time
t_WR
10
Data Setup Time
Data Hold Time High
INTA and INTB Pulse
t_DS
45
t_DH
0
t_IPW
3
Width
AC TEST CONDITIONS
Input Levels:
0V to 3V
Transition Times:
5 ns
DS1384
(0°C to 70°C; V_CC = 5.0V ±10%)
TYP
MAX
UNITS NOTES
ns
120
ns
120
ns
40
ns
60
ns
40
ns
ns
ns
ns
25
ns
20
ns
20
ns
50
ns
40
ns
ns
ns
ns
ns
ns
40
ns
40
ns
ns
ns
ns
ms
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