Philips Semiconductors FAST Products
Prroduct specification
Fiber optic LED driver
74F5300
FEATURES
•
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
PIN CONFIGURATION
V
CC
1
ENABLE 2
INPUT 3
GND 4
8 V
CC
7 GND
6
OUTPUT
5 GND
SF01312
LOGIC DIAGRAM (ONE DRIVER)
V
CC
•
High speed serial data communication
•
Fiber optic data links
•
Local area and metropolitan area networks
•
Digital Television
•
PBX systems
ASSOCIATED PRODUCTS
3
INPUT
TTL
input
buffer
Linearizing
circuit
Output
driver
amp
6
OUTPUT
2
ENABLE
•
NE5210/11/12 transimpedance amplifiers
•
NE5214/5217 postamplifiers with link status indicator
•
74F5300 fiber optic LED driver
TYPE
TYPICAL
PROPAGATION
DELAY
2.5ns
TYPICAL SUPPLY
CURRENT( TOTAL)
8mA
GND
V
CC
= Pin 1, 8
GND = Pin 4, 5, 7
SF01313
DESCRIPTION
The 74F5300 is a LED driver designed for use in fiber optic links.
The 74F5300 is ideally suited for use in high speed optical high
transmitter systems.
The TTL input buffer accepts TTL data. A logic high on the enable
pin enables the buffer to drive the output driver amplifier. The
linearizing circuits ensures a constant propagation delay for t
PLH
and t
PHL,
and controls 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
PLH
and t
PHL
) and symmetrical rise
and fall times. The resulting optical 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
NE5210/5211/5212 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.
74F5300
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL
RANGE
V
CC
= 5V
±
10%,
T
amb
= 0°C to +70°C
N74F5300N
N74F5300D
DWG. PKG. #
8–pin plastic DIP
8–pin plastic SO
SOT97-1
SOT96-1
INPUT AND OUTPUT LOADING
AND FAN OUT TABLE
PINS
Input
Enable
DESCRIPTION
Data input
Enable input
74F (U.L.)
HIGH/LOW
1.0/1.0
1.0/1.0
LOAD VALUE
HIGH/LOW
20µA/0.6mA
20µA/0.6mA
Output Current driver output
8000/266.6 160mA/160m
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the high
state and 0.6mA in the low state.
1989 Dec 13
2
853-1409 98304
Philips Semiconductors FAST Products
Prroduct specification
Fiber optic LED driver
74F5300
APPLICATION FOR 50Mb/s OPTICAL TRANSMITTER
+5V
0.1
µF
10
µF
1
8
+5V
120pF
INPUT
3
90
Ω
TTL
input
buffer
Linearizing
circuit
Output
driver
amp
6
14
Ω
4
Ω
10
µF
ENABLE
2
LED
4
5
7
SF01314
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
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in high output state
Current applied to output in low output state
Operating free air temperature range
Storage temperature range
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to V
CC
240
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°
C
°
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
MIN
V
CC
V
IH
V
IL
I
Ik
I
OH
I
OL
T
amb
Supply voltage
High–level input voltage
Low–level input voltage
Input clamp current
High–level output current
Low–level output current
Operating free air temperature range
0
4.5
2.0
0.8
–18
–160
160
+70
LIMITS
NOM
5.0
MAX
5.5
T
A
= –40 to +85
°
C
UNIT
V
V
V
mA
mA
mA
°
C
1989 Dec 13
3
Philips Semiconductors FAST Products
Prroduct specification
Fiber optic LED driver
74F5300
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
MIN
V
CC
= MIN,
V
OH
High-level output voltage
V
IL
= MAX,
V
IH
= MIN
I
OH
= –160mA
V
CC
= MIN,
V
OL
Low-level output voltage
V
IL
= MAX,
V
IH
= MIN
V
IK
I
I
I
IH
I
IL
I
CC
Input clamp voltage
Input current at maximum input voltage
High–level input current
Low–level input current
Supply current (total)
I
CCH
I
CCL
V
CC
= MIN, I
I
= I
IK
V
CC
= MAX, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX
V
CC
= MAX
4.0
10.5
I
OL
= 100mA
I
OL
= 120mA
I
OL
= 160mA
I
OH
= –80mA
LIMITS
TYP
2
MAX
V
3.3
3.3
3.9
3.6
V
V
V
0.42
0.45
0.55
-0.73
0.55
0.60
0.80
-1.2
100
20
-0.6
12
22
V
V
V
V
µA
µA
mA
mA
mA
UNIT
±
10%V
CC
±
5%V
CC
V
CC
= 5V
2.5
2.8
3.0
2.0
±
10%V
CC
±
10%V
CC
±
10%V
CC
±
10%V
CC
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. The device is not short circuit protected.
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= +25
°
C
SYMBOL
PARAMETER
TEST CONDITION
MIN
t
PLH
t
PHL
D
tpw
t
PS
t
RFS
t
THL
t
TLH
Propagation delay
Input or Enable to Output
Pulse width distortion
1
Propagation delay skew
2, 4
Rise and fall time skew
3, 4
Fall time 90% to 10%
Rise time 10% to 90%
Test circuits and
Waveforms
0.5
1.0
Waveform 1
Frequency = 10MHz
Waveform 2
1.0
1.0
C
L
= 50pF, R
L
= 100
Ω
TYP
2.5
2.5
0.8
0.7
0.6
1.4
2.0
MAX
5.0
5.0
1.2
1.2
1.5
3.5
4.0
0.5
1.0
V
CC
= +5.0V
T
amb
= 0
°
C to +70
°
C
C
L
= 50pF, R
L
= 100
Ω
MIN
1.0
1.0
MAX
5.0
5.0
1.8
1.3
1.5
4.0
4.5
ns
ns
ns
ns
ns
V
CC
= +5.0V
±
10%
UNIT
NOTES:
1. D
tpw
is defined as the difference between input pulse width and output pulse width (0 to 3 volt swing and 50% duty cycle).
2. | t
PLH
actual – t
PHL
actual|.
3. | t
TLH
actual – t
THL
actual|.
4. Skew times are valid only under same test conditions (temperature, V
CC
, loading, etc.,).
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
OUTPUT
INPUT OR
ENABLE
V
M
t
PLH
V
M
t
PHL
V
M
t
PS
OUTPUT
V
M
V
M
OUTPUT
V
M
SF01315
SF01316
Waveform 1. Propagation delay for input to output
1989 Dec 13
4
Waveform 2. Propagation delay skew
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