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