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參數(shù)資料
| 型號： | TFBS6712 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Fast IrDA with Smallest Footprint; Low Profile; |
| 中文描述： | 快速紅外線，最小尺寸，低外形; |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 228K |
| 代理商： | TFBS6712 |
TFBS6712
Document Number
8
4674
Rev. 1.2, 21-Feb-07
Vishay Semiconductors
www.vishay.com
277
Mode Switching
The TFBS6712 is in the SIR mode after power on as
a default mode, therefore the FIR data transfer rate
has to be set by a programming sequence using the
TXD and SD inputs as described below. The low fre-
quency mode covers speeds up to 115.2 kbit/s. Sig-
nals with higher data rates should be detected in the
high frequency mode. Lower frequency data can also
be received in the high frequency mode but with
reduced sensitivity. To switch the transceivers from
low frequency mode to the high frequency mode and
vice versa, the programming sequences described
below are required.
Setting to the High Bandwidth Mode
(0.576 Mbit/s to 4 Mbit/s)
1. Set SD input to logic "HIGH".
2. Set TXD input to logic "HIGH". Wait t
s
≥
200 ns.
3. Set SD to logic "LOW" (this negative edge latches
state of TXD, which determines speed setting).
4. After waiting t
h
≥
200 ns TXD can be set to logic
“LOW”. The hold time of TXD is limited by the maxi-
mum allowed pulse length.
TXD is now enabled as normal TXD input for the high
bandwidth mode.
Setting to the Lower Bandwidth Mode
(2.4 kbit/s to 115.2 kbit/s)
1. Set SD input to logic "HIGH".
2. Set TXD input to logic "LOW". Wait t
s
≥
200 ns.
3. Set SD to logic "LOW" (this negative edge latches
state of TXD, which determines speed setting).
4. TXD must be held for t
h
≥
200 ns.
TXD is now enabled as normal TXDinput for the lower
bandwidth mode.
Truth table
Figure 4. Mode Switching Timing Diagram
TXD
SD
t
s
t
h
50 %
High: FIR
Low: SIR
50 %
50 %
14
8
73
Inputs
Outputs
SD
TXD
Optical input Irradiance [mW/m
2
]
x
RXD
Transmitter
high
x
weakly pulled
(500 k
Ω
)
high
low active (echo)
0
low
high
x
I
e
0
0
0
low
low
low
high >
8
0
μs
low
low
x
high
high
< 4
> Min. irradiance
E
e
in angular range
< Max. irradiance
E
e
in angular range
> Max. irradiance
E
e
in angular range
low (active)
low
low
x
0
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| TFBS6712-TR1 | 制造商:Vishay Intertechnologies 功能描述:4 Mbps 1.8 V 50 cm Side View SMT IrDA Low Profile Fast Infrared Transceiver |
| TFBS6712-TR3 | 功能描述:紅外收發(fā)器 FIR 4Mbit/s 2.4-3.6V Op Voltage RoHS:否 制造商:Vishay Semiconductors 波長:900 nm 連續(xù)數(shù)據(jù)傳輸:115.2 Kbit/s 傳輸距離:1 m 輻射強度:60 mW/sr 半強度角度:44 deg 脈沖寬度:2 us 最大上升時間:100 ns 最大下降時間:100 ns LED 電源電壓:- 0.5 V to 6 V 最大正向電流:80 mA 工作電壓:2.4 V to 5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 尺寸:6 mm x 3.1 mm x 1.9 mm 封裝 / 箱體: 封裝:Reel |
| TFBS6712-TT3 | 功能描述:紅外收發(fā)器 FIR 4Mbit/s 2.4-3.6V Op Voltage RoHS:否 制造商:Vishay Semiconductors 波長:900 nm 連續(xù)數(shù)據(jù)傳輸:115.2 Kbit/s 傳輸距離:1 m 輻射強度:60 mW/sr 半強度角度:44 deg 脈沖寬度:2 us 最大上升時間:100 ns 最大下降時間:100 ns LED 電源電壓:- 0.5 V to 6 V 最大正向電流:80 mA 工作電壓:2.4 V to 5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 尺寸:6 mm x 3.1 mm x 1.9 mm 封裝 / 箱體: 封裝:Reel |
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| TFC-105-01-F-D | 制造商:Samtec Inc 功能描述:CONN SHRD HDR HDR 10 POS 1.27MM SLDR ST TH - Bulk |
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