- 您现在的位置：买卖IC网 > PDF目录98116 > SN74LS245DWG4 (TEXAS INSTRUMENTS INC) LS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 PDF资料下载
参数资料
| 型号： | SN74LS245DWG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | LS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
| 封装： | GREEN, PLASTIC, SOIC-20 |
| 文件页数： | 14/18页 |
| 文件大小： | 714K |
| 代理商： | SN74LS245DWG4 |
SN54LS245, SN74LS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
SERIES 54LS/ 74LS DEVICES
tPHL
tPLH
tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
High-Level
Pulse
Low-Level
Pulse
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note D)
3 V
0 V
VOL
VOH
VOL
In-Phase
Output
(see Note D)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VCC
RL
Test
Point
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT
FOR 2-STATE TOTEM-POLE OUTPUTS
(see Note B)
VCC
RL
From Output
Under Test
CL
(see Note A)
Test
Point
(see Note B)
VCC
RL
From Output
Under Test
CL
(see Note A)
Test
Point
5 k
NOTES: A. CL includes probe and jig capacitance.
B. All diodes are 1N3064 or equivalent.
C. 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.
D. S1 and S2 are closed for tPLH, tPHL, tPHZ, and tPLZ; S1 is open and S2 is closed for tPZH; S1 is closed and S2 is open for tPZL.
E. Phase relationships between inputs and outputs have been chosen arbitrarily for these examples.
F. All input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, ZO ≈ 50 , tr ≤ 1.5 ns, tf ≤ 2.6 ns.
G. The outputs are measured one at a time with one input transition per measurement.
S1
S2
tPHZ
tPLZ
tPZL
tPZH
3 V
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
3 V
0 V
Output
Control
(low-level
enabling)
Waveform 1
(see Notes C
and D)
Waveform 2
(see Notes C
and D)
≈1.5 V
VOH – 0.5 V
VOL + 0.5 V
≈1.5 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
1.3 V
tw
1.3 V
VOL
VOH
Figure 1. Load Circuits and Voltage Waveforms
相关PDF资料 |
PDF描述 |
|---|---|
| SN54LS245FK | LS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, CQCC20 |
| SN74LS247NSRE4 | LS SERIES, SEVEN SEGMENT DECODER/DRIVER, INVERTED OUTPUT, PDSO16 |
| SN74LS247NSRG4 | LS SERIES, SEVEN SEGMENT DECODER/DRIVER, INVERTED OUTPUT, PDSO16 |
| SN74LS251NSRG4 | LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16 |
| SNJ54LS251FK | LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, CQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS245DWR | 功能描述:总线收发器 Octal Bus RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74LS245DWR2 | 制造商:ON Semiconductor 功能描述:Bus XCVR Single 8-CH 3-ST 20-Pin SOIC W T/R |
| SN74LS245DWRG4 | 功能描述:总线收发器 Octal bus Transceiver RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74LS245M | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| SN74LS245ML1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。