UVEPROM
AS27C256
Austin Semiconductor, Inc.
RECOMMENDED TIMING REQUIREMENTS FOR PROGRAMMING:VCC = 6.5 and VPP
12.75V (AMD FLASHRITE ALGO),TA = 25°C (See Figure 2)
=
MIN
TYP
MAX
UNIT
Hold Time, Address
Hold Time, Data
0
µs
µs
µs
µs
µs
µs
µs
µs
µs
th(A)
th(D)
tw(E)PR
tsu(A)
2
95
2
Pulse Duration, Initial Program
Setup Time, Address
Setup Time, G\
100
105
2
tsu(G)
Setup Time, E\
2
tsu(E)
Setup Time, Data
Setup Time, VPP
2
tsu(D)
2
tsu(VPP)
Setup Time, VCC
2
tsu(VCC)
PARAMETER MEASUREMENT INFORMATION
2.08V
RL = 800Ω
Output Under Test
CL = 100 pF1
NOTES:
1. CL includes probe and fixture capacitance.
TheAC 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
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS27C256
Rev. 2.0 7/06
8
AUSTIN [ AUSTIN SEMICONDUCTOR ]
