Philips Semiconductors

Product specification

82S191/82S191A

16K-bit TTL bipolar PROM (2048 x 8)

March 14, 1989

3

AC ELECTRICAL CHARACTERISTICS

R1 = 2=470Ω, R2 = 1kΩ, CL = 30pF, 0°C ≤ Tamb ≤ +75°C, 4.75V ≤ VCC ≤ 5.25V

SYMBOL

PARAMETER

TO

FROM

LIMITS

LIMITS

UNIT

MIN

TYP1

MAX

MIN

TYP1

MAX

Access time2

tAA

Output

Address

50

80

50

55

ns

tCE

Output

Chip Enable

30

40

20

30

ns

Disable time3

tCD

Output

Chip Disable

30

40

20

30

ns

NOTES:

1. Typical values are VCC = 5V, Tamb = +25°C.

2. Tested at an address cycle time of 1

µs.

3. Measured at a delta of 0.5V from Logic Level with R1 = 750Ω, R2 = 750Ω and CL = 5pF.

TEST LOAD CIRCUIT

A1

A0

A2

A4

A5

CE1

GND

VCC

VCC

R1

R2

CL

(INCLUDES SCOPE AND

JIG CAPACITANCE)

DUT

O1

O8

A3

A6

A7

A9

A10

A8

CE2 CE3

VOLTAGE WAVEFORMS

tCE

+3.0V

0V

+3.0V

0V

1.5V

1.5V

1.5V

ADDRESS

CE1

tCD

tAA

All inputs tr = tf = 5ns (10% to 90%).

All AC parameters are measured at 1.5V unless otherwise specified.

VOH

VOL

Hi-Z

O1 - O8

CE2, CE3