MX66C256
AC TEST CONDITIONS
Input Pulse Levels
Input Rise and Fall Times
Input and Output
Timing Reference Level
5.0/V0V
5ns
2.5V
AC TEST LOADS AND WAVEFORMS
5.0V
1923 Ω
5.0V
1923 Ω
OUTPUT
OUTPUT
INCLUDING
JIG AND
SCOPE
100PF
1020Ω
FIGURE 1A
INCLUDING
JIG AND
SCOPE
5PF
1020 Ω
FIGURE 1B
OUTPUT
THEVENIN EQUIVALENT
667 Ω
1.73V
ALL INPUT PULSES
VCC
GND
10%
→
90% 90%
←
→
FIGURE 2
10%
← 5ns
KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
MUST BE
STEADY
MAY CHANGE
FROM H TO L
MAY CHANGE
FROM L TO H
,
DON T CARE:
ANY CHANGE
PERMITTED
DOES NOT
APPLY
OUTPUTS
MUST BE
STEADY
WILL BE
CHANGE
FROM H TO L
WILL BE
CHANGE
FROM L TO H
CHANGE :
STATE
UNKNOWN
CENTER
LINE IS HIGH
IMPEDANCE
¡¨OFF ¡¨STATE
AC ELECTRICAL CHARACTERISTICS (over the operating range)
READ CYCLE
JEDEC
PARAMETER PARAMETER
NAME
NAME
DESCRIPTION
t
AVAX
t
AVQV
t
ELQV
t
GLQV
t
ELQX
t
GLQX
t
EHQZ
t
GHQZ
t
AZQX
t
RC
Read Cycle Time
t
AA
Address Access Time
t
ACS
Chip Select Access Time
t
OE
Output Enable to Output Valid
t
CLZ
Chip Select to Output Low Z
t
OLZ
Output Enable to Output in Low Z
t
CHZ
Chip Deselect to Output in High Z
t
OHZ
Output Disable to Output in High Z
t
OH
Output Disable to Output Address Change
MX66C256-70
MX66C256-10
MIN. TYP. MAX. MIN. TYP. MAX.
70
100
70
100
70
100
50
50
10
10
10
10
0
35
0
35
0
30
0
30
10
10
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
1. Typical characteristics are at Vcc = 5.0V, TA = 25oC.
SWITCHING WAVEFORMS (READ CYCLE)
READ CYCLE1 (1,2,4)
t RC
ADDRESS
D OUT
t OH
t AA
P/N DS0035
4
Macronix America Inc. USA 1338 Ridder Park Dr., San Jose, CA 95131
Tel (408)453-8088 Fax (408)451-0876 www.macronix.com
t OH
Rev. 1.1, Jan., 2000