TMS27C128 131 072-BIT UV ERASABLE PROGRAMMABLE READ-ONLY MEMORY

TMS27PC128 131 072-BIT PROGRAMMABLE READ-ONLY MEMORY

SMLS128E–OCTOBER 1984–REVISED JANUARY 1993

POST OFFICE BOX 1443

77251–1443

10

PARAMETER MEASUREMENT INFORMATION

2.08 V

RL = 800 Ω

Output

Under Test

CL = 100 pF

Figure 2. AC Testing Output Load Circuit

AC testing input/output wave forms

2.4 V

0.4 V

2 V

0.8 V

2 V

0.8 V

AC testing inputs are driven at 2.4 V for logic high and 0.4 V for logic low. Timing measurements are made at

2 V for logic high and 0.8 V for logic low for both inputs and outputs.

A0–A13

E

G

DQ0–DQ7

Addresses Valid

VIH

VIL

VIH

VIL

VIH

VIL

VOH

VOL

ta(A)

ta(E)

ten(G)

tdis

tv(A)

HI-Z

HI-Z

Output Valid

Figure 3. Read Cycle Timing