MIL-M-38510-207 Microcircuit, Digital, 256-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, tungsten W, titanium tungsten TiW, or zapped vertical emitter ZVE as the fusible link or programming element. Two product assurance classes and a choice of case outlines and lead material and 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 For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.

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Parameter

Symbol

Conditions

Limits   1/

Unit

Min

Recommended

Max

Current into output during programming before the fuse

has programmed

IOUT1

VCC = 5.5 V, VOUT = 9.0 V

0.1

mA

VCC = 5.5 V, VOUT = 25 V

35

Current into output during programming after the fuse has programmed

IOUT2

VCC = 5.5 V, VOUT = 20 V

3

mA

Rise time of program pulse applied to the data out from

10% to 90%

tTLH

50

60

70

µs

Chip enable ( CE ) pin pulse width

tPP

Chip disabled

VCC = 5.5 V

80

95

110

µs

Pulse width of programming voltage

tP

Chip disabled

VCC = 5.5 V

1

40

µs

Fall time of the pulse applied to the CE from 90% to 10%

tTHL

50

1000

ns

Required time delay between disabling memory output and

application of output programming pulse

tD1

Measured at 1.5 V levels

70

80

90

µs

Required time delay between removal of programming

pulse and enabling memory output

tD2

Measured at 1.5 V levels

100

ns

VCC required during programming

VCCP

5.40

5.50

5.60

V

Output current required during verification

IOLV1

TC = 25°C, VCC = 4.20 V

chip enabled

11

12

13

mA

Output current required during verification

IOLV2

TC = 25°C, VCC = 6.0 V

chip enabled

0.19

0.2

0.21

mA

Maximum duty cycle during automatic programming of enable and output pin

DC

TP / TC

25

%

Required programming voltage on the output pin

VOUT

20

20

26

V

Required current limit of the power supply feeding the output during programming

IL

VOUT = 25 V, VCC = 5.5 0 V

150

mA