74F5300 Datasheet, PDF (2/10 Pages) NXP Semiconductors – Fiber optic LED driver

Philips Semiconductors FAST Products
Fiber optic LED driver
Prroduct specification
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
• High speed serial data communication
• Fiber optic data links
• Local area and metropolitan area networks
• Digital Television
• PBX systems
ASSOCIATED PRODUCTS
• NE5210/11/12 transimpedance amplifiers
• NE5214/5217 postamplifiers with link status indicator
• 74F5300 fiber optic LED driver
TYPE
74F5300
TYPICAL
PROPAGATION
DELAY
2.5ns
TYPICAL SUPPLY
CURRENT( TOTAL)
8mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
8–pin plastic DIP
COMMERCIAL
RANGE
V_CC = 5V ±10%,
T_amb = 0°C to +70°C
N74F5300N
8–pin plastic SO
N74F5300D
DWG. PKG. #
SOT97-1
SOT96-1
INPUT AND OUTPUT LOADING
AND FAN OUT TABLE
PINS
DESCRIPTION
74F (U.L.) LOAD VALUE
HIGH/LOW HIGH/LOW
Input Data input
1.0/1.0
20µA/0.6mA
Enable Enable input
1.0/1.0
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.
PIN CONFIGURATION
V_CC 1
ENABLE 2
INPUT 3
GND 4
8 _VCC
7 _GND
6 OUTPUT
5 GND
LOGIC DIAGRAM (ONE DRIVER)
V_CC
SF01312
3
INPUT
TTL
input
buffer
2
ENABLE
V_CC = Pin 1, 8
GND = Pin 4, 5, 7
Linearizing
circuit
Output
driver
amp
6
OUTPUT
GND
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.
1989 Dec 13
2
853-1409 98304