Ac operating characteristics (continued), Figure 1. read cycle timing – Rainbow Electronics DS1500 User Manual
Page 4
DS1500 Y2KC Watchdog RTC with Nonvolatile Control
4 of 19
AC OPERATING CHARACTERISTICS (continued)
(V
CCI
= 3.3V
±10%, T
A
= -40°C to +85°C.)
PARAMETER SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Read Cycle Time
t
RC
120 ns
Address Access Time
t
AA
120 ns
CS to DQ Low-Z
t
CSL
(Note
10)
5
ns
CS Access Time
t
CSA
120 ns
CS Data Off Time
t
CSZ
(Note
10)
40 ns
OE to DQ Low-Z (0°C to +85°C)
t
OEL
(Note
10)
5
ns
OE to DQ Low-Z (-40°C to 0°C)
t
OEL
(Note
10)
2
ns
OE Access Time
t
OEA
100 ns
OE Data Off Time
t
OEZ
(Note
10)
35 ns
Output Hold from Address
t
OH
5
ns
Write Cycle Time
t
WC
120 ns
Address Setup Time
t
AS
0
ns
WE Pulse Width
t
WEW
100 ns
CS Pulse Width
t
CSW
110 ns
Data Setup Time
t
DS
80
ns
Data Hold Time
t
DH
5
ns
Address Hold Time
t
AH
0
ns
WE Data Off Time
t
WEZ
(Note
10)
40 ns
Write Recovery Time
t
WR
15
ns
CEI to CEO Propagation Delay
t
CEPD
10
ns
Pulse Width,
OE, WE, or CS High
PW
HIGH
40
ns
Pulse Width,
OE, WE, or CS Low
PW
LOW
100 ns
Figure 1. Read Cycle Timing
t
RC
t
CSA
t
OEA
t
CSL
t
OEL
t
OH
t
O EZ
t
AA
VALID
DQ0-DQ7
OE
CS
A0-A4
t
CSZ