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參數(shù)資料
| 型號(hào)： | MAX6817EUT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 標(biāo)準(zhǔn)邏輯 |
| 英文描述： | 8-Bit Binary Counters With Input Registers 20-LCCC -55 to 125 |
| 中文描述： | SPECIALTY LOGIC CIRCUIT, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 188K |
| 代理商： | MAX6817EUT-T |
_______________Detailed Desc ription
T heory of Operation
The MAX6816/MAX6817/MAX6818 are designed to
eliminate the extraneous level changes that result from
interfacing with mechanical switches (switch bounce).
Virtually all mechanical switches bounce upon opening
or closing. These switch debouncers remove bounce
when a switch opens or closes by requiring that
sequentially clocked inputs remain in the same state for
a number of sampling periods. The output does not
change until the input is stable for a duration of 40ms.
The circuit block diagram (Figure 1) shows the func-
tional blocks consisting of an on-chip oscillator,
counter, exclusive-NOR gate, and D flip-flop. When the
input does not equal the output, the XNOR gate issues
a counter reset. When the switch input state is stable
for the full qualification period, the counter clocks the
flip-flop, updating the output. Figure 2 shows the typical
opening and closing switch debounce operation. On
the MAX6818, the change output (
CH)
is updated
simultaneously with the switch outputs.
Undervoltage Loc kout
The undervoltage lockout circuitry ensures that the out-
puts are at the correct state on power-up. While the sup-
ply voltage is below the undervoltage threshold
(typically 1.9V), the debounce circuitry remains trans-
parent. Switch states are present at the logic outputs
without delay.
M
±15kV ES D-Protec ted, S ingle/Dual/Oc tal,
CMOS S witc h Debounc ers
4
_______________________________________________________________________________________
PIN
2
—
—
—
1, 3
—
—
—
12–19
—
4, 6
—
3
—
—
—
—
2–9
—
—
11
—
—
1
4
5
20
Pin Desc ription
FUNCTION
Switch Input
Switch Inputs
CMOS Debounced Outputs
CMOS Debounced Outputs
CMOS Debounced Output
Switch Inputs
Change-of-State Output. Goes low on switch input change of
state. Resets on
EN
. Leave unconnected if not used.
Active-Low, Three-State Enable Input for outputs. Resets
CH
.
Tie to GND to “always enable” outputs.
+2.7V to +5.5V Supply Voltage
NAME
IN
IN1, IN2
OUT8–OUT1
OUT2, OUT1
OUT
IN1–IN8
CH
EN
V
CC
V
CC
V
CC
V
CC
R
PU
D
Q
R
Q
D
COUNTER
LOAD
OUT
IN
ESD
PROTECTION
UNDER-
VOLTAGE
LOCKOUT
OSC.
MAX6816
MAX6817
MAX6818
Figure 1. Block Diagram
1
2
10
Ground
GND
MAX6816
MAX6817
MAX6818
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6818EAP | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6818EAP/GG8 | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6818EAP+ | 功能描述:監(jiān)控電路 Octal Switch Debouncer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6818EAP+ | 制造商:Maxim Integrated Products 功能描述:SWITCH ANALOG ((NW)) |
| MAX6818EAP+T | 功能描述:監(jiān)控電路 Octal Switch Debouncer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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