Philips 74f5302 DATASHEETS

INTEGRATED CIRCUITS

74F5302

Fiber optic dual LED/clock driver

Product specification
IC15 Data Handbook




1990 Jul 24

Philips Semiconductors Product specification

74F5302Fiber optic dual LED/clock driver

FEA TURES

•TTL inputs

•Output enable control

•High current source and sink capability

•Matched propagation delay times (t

PLH

, t

)

PHL

•Symmetrical rise and fall times

•ESD protection greater than 2000 volts

•Single +5V supply

•Surface mount package

APPLICATIONS

•High speed serial data communication

•Fiber optic data links

•Local area and metropolitan area networks

•Digital Television

•PBX systems

ASSOCIATED PRODUCTS

•NE5210/1 1/12 transimpedance amplifiers

•NE5214/5217 postamplifiers with link status indicator

•74F5300 fiber optic LED driver

PIN CONFIGURATION

NC

Q0

GND
GND
GND

Q1

NC

1
2
3
4
5
6

14
13
12
11
10

9
87

SF00591

LOGIC DIAGRAM (ONE DRIVER)

V

CC

14

D0

E0

VCC = Pin 10, 11, 12
GND = Pin 3, 4, 5

TTL
input
buffer

13

Linearizing
circuit

GND

D0

E0

V

CC

V

CC

V

CC

D1
E1

Output
driver

2

Q0

amp

SF00592SF00592

TYPE

TYPICAL

PROPAGATION

TYPICAL SUPPL Y

CURRENT( TOTAL)

DELA Y

74F5302 2.5ns 8mA

ORDERING INFORMATION

ORDER CODE

DESCRIPTION COMMERCIAL RANGE

= 5V ±10%,

V

CC

= 0°C to +70°C

T

amb

PKG DWG #

14–pin plastic DIP N74F5302N SOT27-1
14–pin plastic SO N74F5302D SOT108-1

INPUT AND OUTPUT LOADING AND FAN OUT TABLE

PINS DESCRIPTION

74F (U.L.)

HIGH/LOW

Dn Data inputs 1.0/1.0 20µA/0.6mA
En Enable inputs 1.0/1.0 20µA/0.6mA
Qn Current driver output 8000/266.6 160mA/160mA

NOTE: One (1.0) FAST unit load is defined as: 20µA in the high
state and 0.6mA in the low state.

LOAD VALUE

HIGH/LOW

DESCRIPTION

The 74F5302 is a dual LED/clock driver designed for use in fiber
optic links. The 74F5302 is ideally suited for use in high speed
optical high transmitter systems. It is also ideal for use as a clock
driver.

The TTL input buffer accepts TTL data. The linearizing circuits
ensures a constant propagation delay for t

PLH

and t
the rise and fall times. The output driver amplifier is capable of
sourcing more than 160mA and sinking more than 160mA at low
impedances. The high current output driver has been designed to
deal with transmission line effects of high speed switching systems
with fast rising and falling edges. The performance of the system
can be enhanced by matching impedance at the output for proper
termination. It exhibits closely matched propagation delays (t

) and symmetrical rise and fall times. The resulting optical

t

PHL

waveform has minimal duty cycle distortion (DCD). When used with
the external pre–bias and pre–charging circuits, the response can
be tailored to a specific LED to eliminate any overshoot and to
minimize the long fall response.

Additionally, this part can be used as the transmitter in a complete
fiber optic system when combined with any of the
NE5210/521 1/5212 preamplifiers and NE5214/5217 postamplifiers
for the optical receiver. Please refer to applications note AN1121 in
the Philips Semiconductors Fiber Optic Communication Data Book
for more specific applications information.

and controls

PHL,

PLH

and

July 24, 1990 853-1410 00037

2

Philips Semiconductors Product specification

74F5302Fiber optic dual LED/clock driver

APPLICATION FOR 50Mb/s OPTICAL TRANSMITTER

0.1 µF

11 12

14

D0

13

E0

TTL
input
buffer

Linearizing
circuit

74F5302 (one driver)

+5V

Output
driver
amp

10 µF

120pF

2

4 Ω14 Ω

LED

543

90 Ω

+5V

10 µF

SF00593

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the
operating free air temperature range.)

SYMBOL PARAMETER RATING UNIT

V
V
I

IN

V
I

OUT

T
T

CC
IN

OUT

amb

stg

Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA

Voltage applied to output in high output state –0.5 to V

CC

Current applied to output in low output state 240 mA
Operating free air temperature range 0 to +70
Storage temperature range –65 to +150

V

°C
°C

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS

MIN NOM MAX UNIT

V

CC

V

IH

V

IL

I

Ik

I

OH

I

OL

T

amb

July 24, 1990

Supply voltage 4.5 5.0 5.5 V
High–level input voltage 2.0 V
Low–level input voltage 0.8 V
Input clamp current –18 mA
High–level output current –160 mA
Low–level output current 160 mA
Operating free air temperature range 0 +70

3

T

= –40 to +85°C

A

°C