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參數(shù)資料
| 型號： | 7LVC1284D |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 3.3V Parallel printer interface transceiver/buffer |
| 中文描述： | 7 I/O, PIA-PRINTER INTERFACE, PDSO20 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 100K |
| 代理商： | 7LVC1284D |
Philips Semiconductors
Product specification
74LVC1284
3.3V Parallel printer interface transceiver/buffer
2
1995 Nov 10
853-1819 16000
FEATURES
Asynchronous operation
4-Bit transceivers
3 additional buffer/driver lines
TTL compatible inputs
ESD protection exceeds 1000V 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 74LVC1284 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 300mV of input hysteresis at V
CC
= 3.3V.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
T
amb
= 25
°
C; GND = 0V
TYPICAL
UNIT
R
D
B/Y Side output resistance
V
CC
= 3.3V; V
O
= 1.65V
0.2V (See Figure 2)
45
SR
B/Y Side slew rate
R
L
= 62
; C
L
= 50pF (See Waveform 4)
0.2
V/ns
I
CC
Total static current
V
I
= V
CC
/GND; I
O
= 0
5
μ
A
V
HYS
Input hysteresis
V
CC
= 3.3V
0.4
V
t
PLH
/t
PHL
Propagation delay
to the B/Y side outputs
V
CC
= 3.3V
12.6/12.4
ns
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DRAWING NUMBER
20-pin plastic SO
0
°
C to +70
°
C
7LVC1284 D
SOT163-1
20-pin plastic SSOP Type II
0
°
C to +70
°
C
74LVC1284 DB
SOT339-1
20-pin plastic TSSOP Type I
0
°
C to +70
°
C
74LVC1284 PW
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
LOGIC SYMBOL
DIR
HD
Y7
A7
A
Y
Y6
A6
A
Y
Y5
A5
A
Y
B4
A4
A
B
A
B
B2
A2
A
B
A
B
B3
A3
B1
A1
SK00009
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