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MIL-M-38510-209 Microcircuit, Digital, 8192-Bit, Schottky, Bipolar, Programmable Read-Only Memory Prom, Monolithic SiliconThis specification covers the detail requirements for monolithic silicon, PROM microcircuits which employ thin film nichrome NiCr resistors, zapped vertical emitter, tungsten W, titanium tungsten TiW, or platinum silicide as the fusible link or programming element. Two product assurance class and a choice of case outlines and lead finishes are provided for each type and are reflected in the complete part number. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.

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MIL-M-38510/209H


TABLE IVC.  Programming characteristics for circuit C and H.



Parameter


Symbol


Conditions

Limits   1/

Unit

Min

Recommended

Max


Programming voltage


VCCP  1/

ICCP = 375 ±75 mA

transient or steady-state


8.5


8.75


9.0


V

Verification upper limit


VCCH

5.3

5.5

5.7

V


Verification lower limit


VCCL


4.3


4.5


4.7


V


Verify threshold


VS  2/


1.4


1.5


1.6


V

Programming supply current


ICCP


VCCP = +8.75 ±0.25 V


300


350


400


mA

Input voltage high level

"1"


VIH


2.4


5.5


V

Input voltage low level

"O"


VIL


0


0.4


0.8


V


Input current


IIH


VIH = +5.5 V


50


µA


Input current


IIL


VIL = +0.4 V


-500


µA

Output programming voltage


VOUT   3/

IOUT = 200 ±20 mA, transient or steady-state


16


17


18


V

Output programming current


IOUT


VOUT = +17 ±1 V


180


200


220


mA

Programming voltage transition time


tTLH


10


50


µs


CE  programming pulse width


tP


0.3


0.4


0.5


ms


Pulse sequence delay


tD


10


µs


Programming duty cycle

tPR

tPR+tPS


50


%


1/  Bypass VCC to GND with a 0.01 µF capacitor to reduce voltage spikes.


2/  VS is the sensing threshold of the PROM output voltage for a programmed bit.  It normally constitutes the reference voltage applied to a comparator circuit to verify a successful fusing attempt.


3/  Care should be taken to insure the 17 ±1 V output voltage is maintained during the entire fusing cycle.

The recommended supply is a constant current source clamped at the specified voltage limit.

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