SN75186

QUADRUPLE DRIVER/RECEIVER WITH LOOPBACK

SLLS068C – FEBRUARY 1990 – REVISED MAY 1995

5

POST OFFICE BOX 655303

DRIVER SECTION

electrical characteristics over full recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

RL = 3 kΩ,

VIL = 0.8 V,

See Figure 1

7

V

VOL

Low-level output voltage‡

RL = 3 kΩ,

VIH = 2 V,

See Figure 1

–7

V

VOH(LB)

High-level output voltage in

loopback modeद

RL = 3 kΩ,

LB at 0.8 V,

VIL = 0.8 V

–7

V

IIH

High-level input current

(driver and loopback inputs)#

VI = 5 V,

See Figure 2

100

µA

IIL

Low-level input current

(driver and loopback inputs)#

– 100

µA

VOS(H)

High-level short-circuit output

current

VI = 0.8 V,

VO = 0,

See Note 3 and Figure 1

–10

–20

–35

mA

VOS(L)

Low-level short-circuit output

current

VI = 2 V,

VO = 0,

See Note 3 and Figure 1

10

20

35

mA

ICC1

Supply current from VCC1

No load

2.5

4

mA

ICC1(LB)

Supply current from VCC1 with

loopback on

No load,

LB at 0.8 V

10

mA

IEE

Supply current from VEE

No load

– 2.5

–4

mA

IEE(LB)

Supply current from VEE with

loopback on

No load,

LB at 0.8 V

–10

mA

ICC2

Supply current from VCC2

No load,

VI = 0,

See Note 5

–10

– 100

µA

ICC2(LB)

Supply current from VCC2 with

loopback on

No load,

See Note 5

LB at 0.8 V,

VI = 0,

–10

– 100

µA

ro

Output resistance

VCC1 = VEE = VCC2 = 0,

See Note 4

VO = – 2 V to 2 V,

0.3

5

k

Ω

† All typical values are at TA = 25°C.

‡ The algebraic convention, where the more positive (less negative) limit is designated as maximum, is used in this data sheet for logic levels only.

§ This is the most positive level to which the driver output rises when the device is in the loopback mode and the driver input is at a low level.

¶ The loopback mode should be entered only when the driver output is in the low (marking) state.

# Unused driver inputs should be tied to 0 V or VCC2; unused loopback inputs should be tied to VCC2.

NOTES:

3. Minimum IOS(H) and IOS(L) are specified at VO = 0, as this more accurately describes the output current needed to dynamically drive

capacitive lines. A minimum of

±10 mA is sufficient to drive 2500 pF in parallel with 3 kΩ at a slew rate of 4 V/µs ( in accordance

with EIA / TIA-232-E and V.28).

4. Test conditions are those specified by EIA / TIA-232-E.

5. Without a load and VI = 0, the worst-case conditions, VCC2 sources a small current originating from VCC1 giving ICC2 supply current

a negative sign. When a receiver has an output load, VCC2 sinks static and dynamic supply currents to meet load requirements.