M38510/20909BKA E2V, M38510/20909BKA Datasheet - Page 54

• Manufacturer Part Number: M38510/20909BKA
• Manufacturer: E2V

Specifications of M38510/20909BKA

• Lead Free Status / RoHS Status: Supplier Unconfirmed

4.10 Programming procedure for circuit D. The waveforms on figure 5D, the programming characteristics in
table IVD and the following procedures shall apply for programming the device:
a. Connect the device in the electrical configuration for programming.
b. Select the word to be programmed by applying the appropriate voltages to the address pins as well as the
c. Apply the proper power, V
d. Verify that the bit to be programmed is in the “0” logic state.
e. Enable the chip for programming by application of the chip enable voltage, V
f. Apply I
g. Verify that the programmed bits is in the “1” logic state. Lower V
h. Lower V
i. If the bit verifies as not having been programmed at V
j. If the bit verifies as having been programmed at V
k. Repeat 4.10a through 4.10j for all other bits to be programmed.
l. For class S and B devices, if any bit does not verify as programmed, it shall be considered a programming
required voltages to chip enable pins to select the device.
and CE
open. Only one output may be programmed at a time. During the rise of the current ramp, the required
current will be achieved to program the junction. As programming occurs, a drop in voltage can be sensed
at the output of the device. Upon detection of V
Note that the PROM is supplied with fuses generating a low level logic output. Programming a fuse will
cause the output to go to a high level logic in the verify mode.
up to 15 times until the bit is programmed. If after 16 programming attempts, the bit does not program, the
device shall be considered a reject.
followed:
(1)
(2)
reject.
If the current required to program was less than I
If the current required to program was equal to or greater than I
considered a reject and no further attempts at programming other bits shall be attempted.
OP
4
CC
should be left high, and CE
programming current ramp to the output to be programmed. The other outputs shall be left
to 0 V. The power supply duty cycle shall be equal to or less than 50 percent.
CC
= 6.5 V, GND = 0 V.
1
MIL-M-38510/209E
should remain low.
54
ps
, the current shall be held for t
CC
= 6.5 V, one of the following two conditions shall be
CC
OP
= 6.5 V, repeat the programming ramp sequence
(max), proceed to 4.10 k.
P
(CE
OP
1
) to 0 V and read the output.
(max), the device shall be
P(CE)
hap
= 21.0 V, CE
and then shut off.
2
, CE
3
,