ICM7170 Datasheet, PDF (5/14 Pages) Intersil Corporation – Microprocessor-Compatible, Real-Time Clock

ICM7170
ICM7170
AC Electrical Specifications T_A = -40^oC to 85^oC, V_DD = +5V ± 10%, V_BACKUP = V_DD,
D0 - D7 Load Capacitance = 150pF, V_IL = 0.4V, V_lH = 2.8V, Unless Otherwise Specified
PARAMETER
MIN
MAX
UNITS
READ CYCLE TIMING
READ to DATA Valid, t_RD
ADDRESS Valid to DATA Valid, t_ACC
READ Cycle Time, t_CYC
Read High Time, t_RH
RD High to Bus Three-State, t_RH
ADDRESS to READ Set Up Time, t_AS
ADDRESS HOLD Time After READ, t_AR
WRITE CYCLE TIMING
-
250
ns
-
300
ns
400
-
ns
150
-
ns
-
25
ns
50
-
ns
0
-
ns
ADDRESS Valid to WRITE Strobe, t_AD
ADDRESS Hold Time for WRITE, t_WA
WRITE Pulse Width, Low, t_WL
WRITE High Time, t_WH
DATA IN to WRITE Set Up Time, t_DW
DATA IN Hold Time After WRITE, t_WD
WRITE Cycle Time, t_CYC
MULTIPLEXED MODE TIMING
50
-
ns
0
-
ns
100
-
ns
300
-
ns
100
-
ns
30
-
ns
400
-
ns
ALE Pulse Width, High, t_LL
ADDRESS to ALE Set Up Time, t_AL
ADDRESS Hold Time After ALE, t_LA
50
-
ns
30
-
ns
30
-
ns
Timing Diagrams
A0 - A4, CS
RD
ADDRESS VALID, CS LOW
t_AS
t_AR
t_CYC
t_RD
D0 - D7
t_ACC
OUTPUT DATA VALID
t_RX
FIGURE 1. READ CYCLE TIMING FOR NON-MULTIPLEXED BUS (ALE = V_IH, WR = V_IH)
Specification Number ICM7170_IM (IL) REV -
4
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