AK2546 Datasheet, PDF (14/27 Pages) Asahi Kasei Microsystems – 7 channel T1 Transceiver

ASAHI KASEI
[AK2546]
AC CHARACTERISTICS (Parallel Port)
Parameter
Symbol Min
Typ
Max
Read/Write Cycle
tcyc
250
Motorola Mode
Address Setup Time
Address Hold Time
AS to DS Delay Time
DS to AS Delay Time
Read Data Delay Time
t1
10
—
—
t2
10
—
—
t3
20
—
—
t4
20
—
—
t5
—
—
40
Read Data Hold Time
R/W Setup Time
R/W Hold Time
CS Setup Time
CS Hold Time
Write Data Setup Time
Write Data Hold Time
t6
—
—
20
t7
10
—
—
t8
10
—
—
t9
10
—
—
t10
15
—
—
t11
40
—
—
t12
20
—
—
DS Pulse Width
t13
100
—
—
AS Pulse Width
t14
20
—
—
Address Invalid to DS Delay Time t15
0
—
—
Intel Mode
Address Setup Time
Address Hold Time
ALE to WR Delay Time
t21
10
—
—
t22
10
—
—
t23
20
—
—
WR to ALE Delay Time
RD to ALE Delay Time
Read Data Delay Time
Read Data Hold Time
CS Setup Time
CS Hold Time
Write Data Setup Time
t24
20
—
—
t25
20
—
—
t26
—
—
40
t27
—
—
20
t28
10
—
—
t29
15
—
—
t30
40
—
—
Write Data Hold Time
t31
20
—
—
RD Pulse Width
t32
100
—
—
WR Pulse Width
t33
100
—
—
ALE Pulse Width
t34
20
—
—
Address Invalid to RD Delay Time t35
0
—
—
Notes) CL= 50pF on AD0-AD7. All of the timing is specified at 50%VDD.
Units Condition
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C0019-E-01
14
1999/9