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參數(shù)資料
| 型號： | SN74F2245DB |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | NiCd/NiMH Charge Controller with Negative dV and Peak Voltage Detection Termination 8-SOIC 0 to 70 |
| 中文描述： | 25歐姆八路總線收發(fā)器具有三態(tài)輸出 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 84K |
| 代理商： | SN74F2245DB |
SN74F2245
25-
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SDFS099 – MAY 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
R1
CL
(see Note A)
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
LOAD CIRCUIT FOR
3-STATE AND OPEN-COLLECTOR OUTPUTS
R1
S1
7 V (tPZL, tPLZ)
Open
(all others)
From Output
Under Test
Test
Point
R2
CL
(see Note A)
RL = R1 = R2
1.5 V
1.5 V
1.5 V
3 V
3 V
0 V
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing Input
(see Note C)
Data Input
(see Note C)
1.5 V
1.5 V
3 V
3 V
0 V
0 V
High-Level
Pulse
(see Note C)
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATION
1.5 V
1.5 V
tPHL
tPLH
tPLH
tPHL
Input
(see Note C)
Out-of-Phase
Output
(see Note E)
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0 V
VOL
VOH
VOH
VOL
In-Phase
Output
(see Note E)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (see Note D)
tPHZ
tPLZ
0.3 V
tPZL
tPZH
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0 V
Output
Control
(low-level enable)
Waveform 1
(see Notes B and E)
Waveform 2
(see Notes B and E)
0 V
VOH
VOL
3.5 V
0.3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A. CL includes probe and jig 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. All input pulses are supplied by generators having the following characteristics: PRR
≤
1 MHz, tr = tf
≤
2.5 ns, duty cycle = 50%.
D. When measuring propagation delay times of 3-state outputs, switch S1 is open.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74F2245DBLE | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74F2245DBR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74F2245DW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74F2245DWR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74F2245N | 制造商:Texas Instruments 功能描述: |
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