參數(shù)資料
型號(hào)： SAA3008T
廠商： NXP SEMICONDUCTORS
元件分類： 搖控器
英文描述： Infrared remote control transmitter RECS 80 low voltage
中文描述： INFRARED, TRANSMITTER IC, PDSO20
封裝： PLASTIC, SO-20
文件頁(yè)數(shù)： 9/17頁(yè)
文件大小： 110K
代理商： SAA3008T
December 1988
9
Philips Semiconductors
Preliminary specification
Infrared remote control transmitter
(RECS 80 low voltage)
SAA3008
Table 3
Pulse timing
PARAMETER
SYMBOL
DURATION
DURATION at f
OSC
= 455 kHz;
t
OSC
= 2.2
μ
s
26.4
μ
s
17.6
μ
s
8.8
μ
s
140.8
μ
s
2.53 ms
Modulation period
Modulation LOW time
Modulation HIGH time
Modulation pulse width
Basic unit of pulse spacing
Word length for subsystem
addresses
0 to 7
8 to 20
Pulse separation for
logic 0
logic 1
reference time
toggle bit
t
M
t
ML
t
MH
t
PW
t
o
12t
osc
8t
osc
4t
osc
5t
M
+
t
MH
1152tosc
t
W
t
W
55296t
osc
59904t
osc
121.44 ms
132.56 ms
t
b
t
b
t
b
t
b
2t
o
3t
o
3t
o
2t
o
3t
o
2
×
1.5t
o
5.06 ms
7.59 ms
7.59 ms
5.06 ms
7.59 ms
2
×
3.79 ms
Start pattern
t
b
OPERATION
Keyboard
In the standby mode all drivers DRV0N-DRV6N are ON
but are non-conducting due to their open drain
configuration. When a key is pressed, a completed drain
connection pulls down one or more of the sense lines to
ground. Referring to Fig.5, the power-up sequence for the
IC commences as a key is pressed. The oscillator
becomes active and then, following the debounce time
(t
DB
), the output drivers become active successively.
Within the first scan cycle the transmission mode,
subsystem address and the selected command code are
sensed and loaded into an internal data latch. In a multiple
keystroke sequence (Fig.6) the command code is always
altered according to the sensed key.
Multiple keystroke protection
The keyboard is protected against multiple keystrokes.
If more than one key is pressed the circuit will not generate
a new REMO sequence (Fig.6).
In a multiple keystroke sequence the scan repetition rate
is increased to detect the release of the key as soon as
possible.
There are two restrictions caused by the special structure
of the keyboard matrix:
The keys switching directly to ground (codes 7, 15, 23,
31, 39, 47, 55, 63) are not completely covered by
multiple keystroke protection. If one sense input is
switched to ground, other keys on that sense line are
ignored.
The sense lines SEN5N and SEN6N are not protected
against multiple keystrokes on the same driver line
because this has been used to define codes 56 to 63.
Output sequence
The output operation starts when the code of the selected
key has been loaded into the internal command register.
A burst of pulses, including the latched address and
command codes, is generated at the output REMO for as
long as the key is pressed. The format of the output pulse
train is as shown in Figs 3 and 4. The operation is
terminated by releasing the key, or by pressing more than
one key at the same time. Once a sequence has been
started, the transmitted words will always be completed
after the key has been released.
The toggle bit T0 is incremented if the key is released for
a minimum time t
REL
(Fig.5). In a multiple keystroke
sequence the toggle bit remains unchanged.
相關(guān)PDF資料
PDF描述
SAA3010 Infrared remote control transmitter RC-5
SAA3027 INFRARED REMOTE CONTROL TRANSMITTER
SAA3049AT Infrared remote control decoder
SAA3049 Infrared remote control decoder
SAA3049A Infrared remote control decoder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA3009 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
SAA3010 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Infrared remote control transmitter RC-5
SAA3010T 制造商:Misc 功能描述:
SAA-301100 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:Single-Mode FC D-Shape ADAPTOR supplied
SAA-301200 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:Single-Mode FC D-Shape ADAPTOR supplied
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*