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參數(shù)資料
| 型號(hào)： | SN74LVC4245APWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大?。?/td> | 383K |
| 代理商： | SN74LVC4245APWR |
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Switching Characteristics
Operating Characteristics
Power-Up Considerations(1)
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375H – MARCH 1994 – REVISED MARCH 2005
over recommended operating free-air temperature range, C
VCCA = 5 V ± 0.5 V,
FROM
TO
VCCB = 2.7 V to 3.6 V
PARAMETER
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
tPHL
1
6.3
A
B
ns
tPLH
1
6.7
tPHL
1
6.1
B
A
ns
tPLH
1
5
tPZL
1
9
OE
A
ns
tPZH
1
8.1
tPZL
1
8.8
OE
B
ns
tPZH
1
9.8
tPLZ
1
7
OE
A
ns
tPHZ
1
5.8
tPLZ
1
7.7
OE
B
ns
tPHZ
1
7.8
V
CCA = 4.5 V to 5.5 V, VCCB = 2.7 V to 3.6 V, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Outputs enabled
39.5
Cpd
Power dissipation capacitance per transceiver
CL = 0,
f = 10 MHz
pF
Outputs disabled
5
TI level-translation devices offer an opportunity for successful mixed-voltage signal design. A proper power-up
sequence always should be followed to avoid excessive supply current, bus contention, oscillations, or other
anomalies caused by improperly biased device pins. Take these precautions to guard against such power-up
problems:
1. Connect ground before any supply voltage is applied.
2. Power up the control side of the device (VCCA for all four of these devices).
3. Tie OE to VCCA with a pullup resistor so that it ramps with VCCA.
4. Depending on the direction of the data path, DIR can be high or low. If DIR high is needed (A data to B bus),
ramp it with VCCA. Otherwise, keep DIR low.
(1)
Refer to the TI application report, Texas Instruments Voltage-Level-Translation Devices, literature number SCEA021.
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LVC4245APWR | 制造商:Texas Instruments 功能描述:Transceiver Logic IC |
| SN74LVC4245APWRE4 | 功能描述:總線收發(fā)器 Octal FET Bus Switch RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVC4245APWRG4 | 功能描述:總線收發(fā)器 Octal FET Bus Switch RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVC4245APWT | 功能描述:總線收發(fā)器 Octal Bus Trncvr & 3.3-5V W/3-St Otpt RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVC4245APWTE4 | 功能描述:總線收發(fā)器 OCTAL FET BUS SWITCH RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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