TMS27C020 262144 BY 8-BIT UV ERASABLE

TMS27PC020 262144 BY 8-BIT

PROGRAMMABLE READ-ONLY MEMORIES

SMLS020C – NOVEMBER 1990 – REVISED SEPTEMBER 1997

7

POST OFFICE BOX 1443

– 0.6 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

– 0.6 V to 14 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range (see Note 1), All inputs except A9 :

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

A9 :

– 0.6 V to 13.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range (’27C020-_ _ JL, ’27PC020_ _FML) :

0

°C to 70°C

. . . . . . . . . . . . . . . . .

Operating free-air temperature range (’27C020-_ _JE, ’27PC020-_ _FME) :

– 40

°C to 85°C

. . . . . . . . . . . . . . .

– 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to GND.

recommended operating conditions

MIN

NOM

MAX

UNIT

VCC

Supply voltage

Read mode (see Note 2)

4.5

5

5.5

V

VCC

Supply voltage

SNAP! Pulse programming algorithm

6.25

6.5

6.75

V

VPP

Supply voltage

Read mode

VCC – 0.6

VCC

VCC + 0.6

V

VPP

Supply voltage

SNAP! Pulse programming algorithm

12.75

13

13.25

V

VIH

High level dc input voltage

TTL

2

VCC + 0.5

V

VIH

High-level dc input voltage

CMOS

VCC – 0.2

VCC + 0.5

V

VIL

Low level dc input voltage

TTL

– 0.5

0.8

V

VIL

Low-level dc input voltage

CMOS

– 0.5

GND + 0.2

V

TA

Operating free-air temperature

’27C020-_ _JL,

’27PC020-_ _FML

0

70

°C

TA

Operating free-air temperature

’27C020-_ _JE,

’27PC020-_ _FME

– 40

85

°C

NOTE 2: VCC must be applied before or at the same time as VPP and removed after or at the same time as VPP. The device must not be

inserted into or removed from the board when VPP or VCC is applied.

electrical characteristics over full ranges of operating conditions

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

VOH

High level dc output voltage

IOH = – 20 µA

VCC – 0.2

V

VOH

High-level dc output voltage

IOH = – 2 mA

2.4

V

VOL

Low level dc output voltage

IOL = 2.1 mA

0.4

V

VOL

Low-level dc output voltage

IOL = 20 µA

0.1

V

II

Input current (leakage)

VI = 0 V to 5.5 V

±1

µA

IO

Output current (leakage)

VO = 0 V to VCC

±1

µA

IPP1

VPP supply current

VPP = VCC = 5.5 V

10

µA

IPP2

VPP supply current (during program pulse)

VPP = 13 V

50

mA

ICC1

VCC supply current (standby)

TTL-input level

VCC = 5.5 V,

E = VIH

. . .

500

µA

ICC1

VCC supply current (standby)

CMOS-input level

VCC = 5.5 V,

E = VCC ± 0.2 V

100

µA

ICC2

VCC supply current (active)

VCC = 5.5 V,

E = VIL

tcycle = minimum cycle time,

outputs open†

30

mA

† Minimum cycle time = maximum access time.