LTC491CS datasheet(3/12 Pages) LINER

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LTC491

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tPLH

Driver Input to Output

RDIFF = 54Ω, CL1 = CL2 = 100pF

tPHL

Driver Input to Output

tSKEW

Driver Output to Output

5ns

tr, tf

Driver Rise or Fall Time

515

tZH

Driver Enable to Output High

CL = 100pF (Figures 4, 6) S2 Closed

tZL

Driver Enable to Output Low

CL = 100pF (Figures 4, 6) S1 Closed

tLZ

Driver Disable Time From Low

CL = 15pF (Figures 4, 6) S1 Closed

tHZ

Driver Disable Time From High

CL = 15pF (Figures 4, 6) S2 Closed

tPLH

Receiver Input to Output

RDIFF = 54Ω, CL1 = CL2 = 100pF

150

tPHL

Receiver Input to Output

150

tSKD

 tPLH – tPHL Differential Receiver Skew

tZL

Receiver Enable to Output Low

CL = 15pF (Figures 3, 8) S1 Closed

tZH

Receiver Enable to Output High

CL = 15pF (Figures 3, 8) S2 Closed

tLZ

Receiver Disable From Low

CL = 15pF (Figures 3, 8) S1 Closed

tHZ

Receiver Disable From High

CL = 15pF (Figures 3, 8) S2 Closed

HARA TERISTICS

WITCHI

VCC = 5V ±5%

(Figures 2, 5)

(Figures 2, 7)

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to device ground unless

otherwise specified.

Note 3: All typicals are given for VCC = 5V and Temperature = 25°C.

The q denotes specifications which apply over the full operating

temperature range.

Note 1: “Absolute Maximum Ratings” are those beyond which the safety

of the device cannot be guaranteed.

NC (Pin 1): Not Connected.

R (Pin 2): Receiver output. If the receiver output is enabled

(REB low), then if A > B by 200mV, R will be high. If A < B

by 200mV, then R will be low.

REB (Pin 3): Receiver output enable. A low enables the

receiver output, R. A high input forces the receiver output

into a high impedance state.

DE (Pin 4): Driver output enable. A high on DE enables the

driver outputs, A and B. A low input forces the driver

outputs into a high impedance state.

D (Pin 5): Driver input. If the driver outputs are enabled

(DE high), then A low on D forces the driver outputs A low

and B high. A high on D will force A high and B low.

GND (Pin 6): Ground Connection.

GND (Pin 7): Ground Connection.

NC (Pin 8): Not Connected.

Y (Pin 9): Driver output.

Z (Pin 10): Driver output.

B (Pin 11): Receiver input.

A (Pin 12): Receiver input.

NC (Pin 13): Not Connected.

VCC (Pin 14): Positive supply; 4.75V ≤ VCC ≤ 5.25V.

FU C

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