N8T14, SN55122, SN75122

TRIPLE LINE RECEIVERS

SLLS075B – D1334, SEPTEMBER 1973 – REVISED FEBRUARY 1993

POST OFFICE BOX 655303

2–4

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

V

High-level input voltage, VIH

A, B, R, or S

2

V

Low-level input voltage, VIL

A, B, R, or S

0.8

V

High-level output current, IOH

– 500

µA

Low-level output current, IOL

16

mA

Operating free air temperature TA

SN55122

–55

125

°C

Operating free-air temperature, TA

SN75122

0

70

°C

5.25 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Vhys

Hysteresis (VT+ – VT–)

R

VCC = 5 V,

TA = 25°C,

See Figures 2 and 4

0.3

0.6

V

VIK

Input clamp voltage

A, B, or S

VCC = 5 V,

II = –12 mA

–1.5

V

VI(BR)

Input breakdown voltage

A, B, or S

VCC = 5 V,

II = 10 mA

5.5

V

VIH = 2 V,

VIL = 0.8 V,

IOH = – 500 µA

2.6

VOH

High-level output voltage

VI(A) = 0,

VI(B) = 0,

VI(S) = 2 V,

VI(R) = 1.45 V, IOH = – 500 µA, See Note 3

2.6

V

VIH = 2 V,

VIL = 0.8 V,

IOL = 16 mA

0.4

VOL

Low-level output voltage

VI(A) = 0,

VI(B) = 0,

VI(S) = 2 V,

VI(R) = 1.45 V, IOL = 16 mA,

See Note 4

0.4

V

IIH

High level input current

A, B, or S

VI = 4.5 V

40

µA

IIH

High-level input current

R

VI = 3.8 V

170

µA

IIL

Low-level input current

A, B, or S

VI = 0.4 V,

VIR = 0.8 V

– 0.1

–1.6

mA

IOS‡

Short-circuit output current

VCC = 5 V,

TA = 25°C

–50

–100

mA

ICCH

High-level supply current

VCC = MAX,

All inputs at 0.8 V,

Outputs open

72

mA

ICCL

Low-level supply current

VCC = MAX,

All inputs at 2 V,

Outputs open

100

mA

† All typical values are at VCC = 5 V and TA = 25°C.

‡ Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second.

NOTES: 3. The receiver input is high immediately before being reduced to 1.45 V.

4. The receiver input is low immediately before being increased to 1.45 V.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Propagation delay time, low-to-high-level output from R input

See Figure 1

20

30

ns

tPHL

Propagation delay time, high-to-low-level output from R input

See Figure 1

20

30

ns