CY7C261 Datasheet, PDF (4/14 Pages) Cypress Semiconductor – 8K x 8 Power-Switched and Reprogrammable PROM

CY7C261
CY7C263/CY7C264
AC Test Loads and Waveforms^[4]
Test Load for -20 through -30 speeds
5V
OUTPUT
R1 500
(658Ω MIL)
5V
OUTPUT
R1 500Ω
(658Ω MIL)
30 pF
INCLUDING
JIG AND
SCOPE
R2 333Ω
(403Ω MIL)
5 pF
INCLUDING
JIG AND
SCOPE
R2 333Ω
(403Ω MIL)
(a) Normal Load
(b) High Z Load
3.0V
GND
≤ 5 ns
90%
10%
90%
10%
≤ 5 ns
Equivalent to: THÉVENIN EQUIVALENT
OUTPUT
R_TH 200Ω (250Ω MIL)
2.0V(1.9VMIL)
Test Load for -35 through -55 speeds
R1250 Ω
5V
5V
OUTPUT
OUTPUT
R1 250Ω
30pF
R2167 Ω
INCLUDING
JIG AND
SCOPE
(c) Normal Load
5 pF
R2167 Ω
INCLUDING
JIG AND
SCOPE
(d) High Z Load
Equivalent to: THÉVENIN EQUIVALENT
OUTPUT
R_TH 100Ω
2.0V
Switching Characteristics Over the Operating Range ^[1,3,4]
Parameter
Description
t_AA
t_HZCS1
Address to Output Valid
Chip Select Inactive to High Z
(7C263 and 7C264)
t_HZCS2
Chip Select Inactive to High Z
(7C261)
t_ACS1
Chip Select Active to Output Valid
(7C263 and 7C264)
t_ACS2
Chip Select Active to Output Valid
(7C261)
t_PU
Chip Select Active to Power-Up
(7C261)
t_PD
Chip Select Inactive to
Power-Down (7C261)
7C261-20
7C263-20
7C264-20
7C261-25
7C263-25
7C264-25
7C261-35
7C263-35
7C264-35
7C261-45
7C263-45
7C264-45
7C261-55
7C263-55
7C264-55
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit
20
25
35
45
55 ns
12
12
20
30
35 ns
20
25
35
45
55 ns
12
12
20
30
35 ns
20
25
35
45
55 ns
0
0
0
0
0
ns
20
25
35
45
55 ns
Document #: 38-04010 Rev. *B
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