CAT28C64B

5

Doc. No. 25006-0A 2/98 P-1

A.C. CHARACTERISTICS, Read Cycle

±10%, unless otherwise specified.

28C64B-12

28C64B-15

Symbol

Parameter

Min.

Max.

Min.

Max.

Units

Read Cycle Time

120

150

ns

CE Access Time

120

150

ns

Address Access Time

120

150

ns

OE Access Time

60

70

ns

CE Low to Active Output

0

0

ns

OE Low to Active Output

0

0

ns

CE High to High-Z Output

50

50

ns

OE High to High-Z Output

50

50

ns

Output Hold from Address Change

0

0

ns

Figure 1. A.C. Testing Input/Output Waveform(3)

INPUT PULSE LEVELS

REFERENCE POINTS

2.0 V

0.8 V

2.4 V

0.45 V

5096 FHD F03

Figure 2. A.C. Testing Load Circuit (example)

5096 FHD F04

Note:

(1) This parameter is tested initially and after a design or process change that affects the parameter.

(2) Output floating (High-Z) is defined as the state when the external data line is no longer driven by the output buffer.

(3) Input rise and fall times (10% and 90%) < 10 ns.

1.3V

DEVICE

UNDER

TEST

1N914

3.3K

CL = 100 pF

OUT

CL INCLUDES JIG CAPACITANCE