SMJ27C040 Datasheet, PDF (6/11 Pages) Austin Semiconductor – UV Erasable Programmable Read-Only Memory

Austin Semiconductor, Inc.
UVEPROM
SMJ27C040
CAPACITANCE OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING
FREE-AIR TEMPERATURE, f = 1MHz (V_CC = V_PP = 5V ±0.5V)*
PARAMETER
TEST CONDITIONS TYP** MAX
UNIT
C_i Input capacitance
V_I = 0V
4
8
pF
C_o Output capacitance
V_O = 0V
8
12
pF
* Capacitance is sampled only at initial design and after any major change.
** All typical values are at T_A = 25°C and nominal voltages.
SWITCHING CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE^1,2
PARAMETER
TEST
-12
-15
CONDITIONS^{2, 3} MIN MAX MIN MAX ^UNIT
t_a(A) Access time from address
120
150 ns
t_a(E) Access time from chip enable
120
150 ns
t_en(G) Output enable time from G\
Output disable time from G\ or E\, whichever
(see Figure 2)
Input t_r < 20ns
50
50 ns
t_{dis occurs first1}
Input t_f < 20ns ^{0 50 0 50}
ns
Output data valid time after change of
t_{v(A) address, E\, or G\, whichever occurs first1}
0
0
ns
NOTES:
1. Value calculated from 0.5V delta to measured output level. This parameter is only sampled and not 100% tested.
2. Common test conditions apply for t_dis except during programming.
3. For all switching characteristics the input pulse levels are 0.4V to 2.4V. Timing measurements are made at 2V for logic high and 0.8V for logic low. (Figure 2)
SWITCHING CHARACTERISTICS FOR PROGRAMMING: V_CC = 6.5V and V_PP = 13V (SNAP!
Pulse), T_A = 25°C
PARAMETER
MIN
MAX UNIT
t_dis(G) Output disable time from G\
0
100
ns
t_en(G) Output enable time from G\
150
ns
TIMING REQUIREMENTS FOR PROGRAMMING
MIN
t_h(A) Hold Time, Address
0
t_h(D) Hold Time, Data
2
t_w(PGM) Pulse Duration, Program SNAP! Pulse Programming Algorithm 95
t_su(A) Setup Time, Address
2
t_su(E) Setup Time, E\
2
t_su(G) Setup Time, G\
2
t_su(D) Setup Time, Data
2
t_su(Vpp) Setup Time, V_PP
2
t_su(Vcc) Setup Time, V_CC
2
TYP
100
MAX
105
UNIT
µs
µs
µs
µs
µs
µs
µs
µs
µs
SMJ27C040
Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
6