as27c256 Austin Semiconductor, Inc., as27c256 Datasheet - Page 8

• Manufacturer Part Number: as27c256
• Description: Uv Erasable Programmable Read-only Memory
• Manufacturer: Austin Semiconductor, Inc.

RECOMMENDED TIMING REQUIREMENTS FOR PROGRAMMING: V
12.75V (AMD FLASHRITE ALGO), T
NOTES:
1. C
The AC testing inputs are driven at 2.4V for logic high and 0.4V for logic low. Timing measurements are made
at 2V for logic high and 0.8V for logic low for both inputs and outputs.
AS27C256
Rev. 2.0 7/06
t
t
t
L
su(VCC)
su(VPP)
w(E)PR
t
t
t
t
includes probe and fixture capacitance.
t
t
su(G)
su(D)
su(A)
su(E)
h(A)
h(D)
Hold Time, Address
Hold Time, Data
Pulse Duration, Initial Program
Setup Time, Address
Setup Time, G\
Setup Time, E\
Setup Time, Data
Setup Time, V
Setup Time, V
FIGURE 2. LOAD CIRCUIT AND VOLTAGE WAVEFORMS
PP
CC
PARAMETER MEASUREMENT INFORMATION
Austin Semiconductor, Inc.
Output Under Test
A
CL = 100 pF
= 25°C (See Figure 2)
1
8
2.08V
R
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
L
= 800Ω
MIN
95
0
2
2
2
2
2
2
2
CC
TYP
UVEPROM
UVEPROM
UVEPROM
100
UVEPROM
UVEPROM
= 6.5 and V
AS27C256
MAX
105
PP
=
UNIT
µs
µs
µs
µs
µs
µs
µs
µs
µs