Datasheet

TFBR4650
www.vishay.com
Vishay Semiconductors
Rev. 1.4, 08-Apr-2019
4
Document Number: 84597
For technical questions within your region: [e-mail]
, [e-mail], [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Notes
• Typical values are for design aid only, not guaranteed nor subject to production testing
(1)
Sensitivity definition: minimum irradiance E
e
in angular range, power per unit area. The receiver must meet the BER specification while the
source is operating at the minimum intensity in angular range into the minimum half-angular range at the maximum link length
(2)
Maximum irradiance E
e
in angular range, power per unit area. The optical delivered to the detector by a source operating at the maximum
intensity in angular range at minimum link length must not cause receiver overdrive distortion and possible related link errors. If placed at
the active output interface reference plane of the transmitter, the receiver must meet its bit error ratio (BER) specification. For more
definitions see the document “Symbols and Terminology” on the Vishay website
(3)
This parameter reflects the backlight test of the IrDA physical layer specification to guarantee immunity against light from fluorescent lamps
(4)
RXD output is edge triggered by the rising edge of the optical input signal. The output pulse duration is independent of the input pulse
duration
(5)
The radiant intensity can be adjusted by the external current limiting resistor to adapt the intensity to the desired value. The given value is
for minimum current consumption. This transceiver can be adapted to > 50 cm operation by increasing the current to > 200 mA, e.g.
operating the transceiver without current control resistor (i.e. R1 = 0 Ω) and using the internal current control
OPTOELECTRONIC CHARACTERISTICS (T
amb
= 25 °C, V
CC
= 2.4 V to 3.6 V unless otherwise noted)
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
RECEIVER
Sensitivity:
minimum irradiance E
e
in
angular range
(1)
9.6 kbit/s to 115.2 kbit/s
λ = 850 nm to 900 nm
E
e
-
40
(4)
81
(8.1)
mW/m
2
(μW/cm
2
)
Maximum irradiance E
e
in
angular range
(2)
λ = 850 nm to 900 nm E
e
5
(500)
--
kW/m
2
(mW/cm
2
)
No receiver output input
irradiance
(3)
According to IrDA IrPHY 1.4,
appendix A1, fluorescent light
specification
E
e
4
(0.4)
--
mW/m
2
(μW/cm
2
)
Rise time of output signal 10 % to 90 %, C
L
= 15 pF t
r (RXD)
20 - 100 ns
Fall time of output signal 90 % to 10 %, C
L
= 15 pF t
f (RXD)
20 - 100 ns
RXD pulse width of output
signal, 50 %
(4)
Input pulse width
1.63 μs
t
PW
1.7 2 2.9 μs
Receiver start up time Power on delay - 100 150 μs
Latency t
L
- 50 200 μs
TRANSMITTER
IRED operating current, current
controlled
The IRED current is internally
controlled but also can be
reduced by an external resistor R1
I
D
200 300 400 mA
Forward voltage of
built-in IRED
I
F
= 300 mA V
F
1.4 1.8 1.9 V
Output leakage IRED current T
amb
= 85 °C I
IRED
--1μA
Output radiant intensity
(5)
α = 0°, 15°, TXD = high, SD = low,
V
CC1
= 3 V, V
CC2
= 3 V, R1 = 30 Ω
(resulting in about 50 mA drive
current)
I
e
51025mW/sr
Output radiant intensity
(5)
α = 0°, 15°, TXD = high, SD = low,
V
CC1
= 3 V, V
CC2
= 3 V, R1 = 0 Ω,
I
F
= 300 mA
I
e
30 65 150 mW/sr
Output radiant intensity
(5)
V
CC1
= 5 V, α = 0°, 15°
TXD = low or SD = high
(receiver is inactive as long as
SD = high)
I
e
- - 0.04 mW/sr
Saturation voltage of IRED
driver
V
CC
= 3 V, I
F
= 50 mA V
CEsat
-0.4- V
Peak - emission wavelength λ
p
880 886 900 nm
Spectral bandwidth Δλ -45-nm
Optical rise time,
optical fall time
t
ropt
,
t
fopt
20 - 100 ns
Optical output pulse duration
Input pulse width t < 30 μs
Input pulse width t ≥ 30 μs
t
opt
t
opt
30
t
50 300
μs
μs
Optical output pulse duration Input pulse width t = 1.63 μs t
opt
1.45 1.61 2.2 μs
Optical overshoot --20%