參數(shù)資料
型號(hào)： 7HCT1284D
廠商： NXP SEMICONDUCTORS
元件分類： 通用總線功能
英文描述： Parallel printer interface transceiver/buffer
中文描述： QUAD LINE TRANSCEIVER, PDSO20
封裝： 7.50 MM, PLASTIC, SOL-20
文件頁(yè)數(shù)： 2/12頁(yè)
文件大小： 138K
代理商： 7HCT1284D
Philips Semiconductors
Product specification
74HCT1284
Parallel printer interface transceiver/buffer
2
1998 Jul 10
853–1768 19693
FEATURES
Asynchronous operation
4-Bit transceivers
3 additional buffer/driver lines
TTL compatible inputs
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
Input Hysteresis
Low Noise Operation
Center Pin V
CC
& GND
IEEE 1284 Compliant Level 1 & 2
Overvoltage Protection on B side
DESCRIPTION
The 74HCT1284 parallel interface chip is designed to provide an
asynchronous, 4-bit, bi-directional, parallel printer interface for
personal computers. Three additional lines are included to provide
handshaking signals between the host and the peripheral. The part
is designed to match IEEE 1284 standard.
The 4 transceiver pins (A/B 1-4) allow data transmission from the A
bus to the B bus, or from the B bus to the A bus, depending on the
state of the direction pin DIR.
The B bus and the Y5-Y7 lines have totem pole or open drain style
outputs depending on the state of the high drive enable pin HD.
The A bus only has totem pole style outputs. All inputs are TTL
compatible with at least 400mV of input hysteresis at V
CC
= 5.0V.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
T
amb
= 25
°
C; GND = 0V
TYPICAL
UNIT
t
PLH
t
PHL
Propagation delay
Bn to An
C
L
= 50pF; V
CC
= 5V
5.3
5.6
ns
ns
C
IN
Input capacitance A
n
, DIR, HD
V
I
= 0V or V
CC
5
pF
C
OUT
Output capacitance B
n
, Y
n
V
O
= 0V or V
CC
; 3-State
14
pF
I
CC
Total supply current
V
CC
= 5.5V
500
nA
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DRAWING NUMBER
20-pin plastic DIP
0
°
C to +70
°
C
74HCT1284N
SOT146-1
20-pin plastic SOL
0
°
C to +70
°
C
7HCT1284D
SOT163-1
20-pin plastic SSOP Type II
0
°
C to +70
°
C
74HCT1284DB
SOT339-1
20-pin plastic TSSOP Type I
0
°
C to +70
°
C
74HCT1284PW
SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A1
A2
A3
A4
GND
GND
A5
A6
A7
DIR
B1
B2
B3
B4
V
CC
V
CC
Y5
Y7
Y6
HD
SK00001
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
1,2,3,4
20,19,18,17
A1 - A4
B1 - B4
Data inputs/outputs
7,8,9
14,13,12
A5 - A7
Y5 - Y7
Buffer/Driver lines
10,11
DIR,HIGH
DRIVE
Direction, Drive
5,6
GND
Ground (0V)
15,16
V
CC
Positive supply voltage
相關(guān)PDF資料
PDF描述
7LN115 Optoelectronic
7LVC125APWDH SC Series, 3 Ohms, 1.0 W, Fixed, Wirewound Resistor
7LVC1284D 3.3V Parallel printer interface transceiver/buffer
7LVC240APWDH Octal buffer/line driver with 5-volt tolerant inputs/outputs; inverting 3-State
7LVC241APWDH Octal buffer/line driver with 5-volt tolerant inputs/outputs 3-State
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
7HDD15SAR99E20X 功能描述:15P F HD PC WATER RES 制造商:conec 系列:* 零件狀態(tài):有效 標(biāo)準(zhǔn)包裝:30
7HG8 制造商:Misc 功能描述: 制造商:Tubes 功能描述:
7HI800013000 制造商:Eurotherm Inc 功能描述:DIGITAL PANEL INDICATOR WITH LINEAR DC THERMOCOUPLE & RTD INPUT100/240 VAC WITH
7HM5 功能描述:基本/快動(dòng)開關(guān) SPDT 1A 28VDC BASIC SWITCH RoHS:否 制造商:Omron Electronics 觸點(diǎn)形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級(jí):IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel
7HSNFRH14 制造商:KLIEN TOOLS 功能描述:Normalized Sledge Hammer - Pinned Fiberglass Rubber Grip Handle - 14 lb
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*