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參數(shù)資料
| 型號： | SN74HCT645PWRG4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| 中文描述： | 八路總線收發(fā)器與三態(tài)輸出 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 412K |
| 代理商： | SN74HCT645PWRG4 |
SCLS019D MARCH 1984 REVISED AUGUST 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
RL
VCC
S1
S2
LOAD CIRCUIT
PARAMETER
CL
tPZH
tpd or tt
tdis
ten
tPZL
tPHZ
tPLZ
1 k
1 k
50 pF
or
150 pF
50 pF
Open
Closed
RL
S1
Closed
Open
S2
Open
Closed
Closed
Open
50 pF
or
150 pF
Open
Open
NOTES: A. CL includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤
1 MHz, ZO = 50
, tr = 6 ns, tf = 6 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
CL
(see Note A)
Test
Point
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
1.3 V
0.3 V
1.3 V
0.3 V
2.7 V
2.7 V
3 V
0 V
tr
tf
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
1.3 V
1.3 V
10%
1.3 V
10%
90%
90%
3 V
VOH
VOL
0 V
tr
tf
Input
In-Phase
Output
1.3 V
tPLH
tPHL
1.3 V
10%
1.3 V
10%
90%
90%
VOH
VOL
tr
tf
tPHL
tPLH
Out-of-
Phase
Output
1.3 V
10%
90%
3 V
≈
VCC
VOL
0 V
Output
Control
(Low-Level
Enabling)
Output
Waveform 1
(See Note B)
1.3 V
tPZL
tPLZ
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOH
≈
0 V
1.3 V
1.3 V
tPZH
tPHZ
Output
Waveform 2
(See Note B)
Figure 1. Load Circuit and Voltage Waveforms
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| SN74HCT645PWT | 功能描述:總線收發(fā)器 Octal Bus Trnscvrs With 3-State Outputs 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 |
| SN74HCT645PWTE4 | 功能描述:總線收發(fā)器 Octal Bus Trnscvrs With 3-State Outputs 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 |
| SN74HCT645PWTG4 | 功能描述:總線收發(fā)器 Octal Bus Transceivr 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 |
| SN74HCT646DW | 功能描述:總線收發(fā)器 Tri-State Octal Bus 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 |
| SN74HCT646DWE4 | 功能描述:總線收發(fā)器 Octal Bus Trncvr/Reg W/3-State 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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