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參數資料
| 型號： | 74LV245 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal bus transceiver (3-State)(八總線收發(fā)器（三態(tài)）) |
| 中文描述： | 八路總線收發(fā)器（3態(tài)）（八總線收發(fā)器（三態(tài)）） |
| 文件頁數： | 2/12頁 |
| 文件大小： | 117K |
| 代理商： | 74LV245 |
Philips Semiconductors
Product specification
74LV245
Octal bus transceiver (3-State)
2
1998 Apr 20
853–1931 19258
FEATURES
Wide operating voltage: 1.0 to 5.5 V
Optimized for low voltage applications: 1.0 to 3.6 V
Accepts TTL input levels between V
CC
= 2.7 V and V
CC
= 3.6 V
Typical V
OLP
(output ground bounce) < 0.8 V at V
CC
= 3.3 V,
T
amb
= 25
°
C
Typical V
OHV
(output V
OH
undershoot) > 2 V at V
CC
= 3.3 V,
T
amb
= 25
°
C
Output capability: bus driver
I
CC
category: MSI
DESCRIPTION
The 74LV245 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT245.
The 74LV245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
74LV245 features an output enable (OE) input for easy cascading
and a send/receive (DIR) input for direction control. OE controls the
outputs so that the buses are effectively isolated.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
≤
2.5 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
Propagation delay
A
n
to B
n
; B
n
to A
n
Input capacitance
C
L
= 15 pF;
V
CC
= 3.3 V
7.0
ns
C
I
C
I/O
3.5
pF
Input/output capacitance
10
pF
C
PD
Power dissipation capacitance per buffer
V
CC
= 3.3 V
V
I
CC
, note 1
40
pF
NOTE:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W)
P
D
= C
PD
V
CC2
f
i
(C
L
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
V
CC2
f
o
) = sum of the outputs.
V
CC2
f
o
) where:
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
20-Pin Plastic DIL
–40
°
C to +125
°
C
74LV245 N
74LV245 N
SOT146-1
20-Pin Plastic SO
–40
°
C to +125
°
C
74LV245 D
74LV245 D
SOT163-1
20-Pin Plastic SSOP Type II
–40
°
C to +125
°
C
74LV245 DB
74LV245 DB
SOT339-1
20-Pin Plastic TSSOP Type I
–40
°
C to +125
°
C
74LV245 PW
74LV245PW DH
SOT360-1
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
1
DIR
Direction
2, 3, 4, 5,
6, 7, 8, 9
A
0
to A
7
Data inputs/outputs
10
GND
Ground (0 V)
18, 17, 16, 15,
14, 13, 12, 11
B
0
to B
7
Data inputs/outputs
19
OE
Output enable input (active LOW)
20
V
CC
Positive supply voltage
FUNCTION TABLE
INPUTS
INPUTS/OUTPUT
OE
DIR
A
n
B
n
L
L
A = B
Inputs
L
H
Inputs
B = A
H
X
Z
Z
NOTES:
H =
L
=
X =
Z
=
HIGH voltage level
LOW voltage level
don’t care
high impedance OFF-state
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| 74LV251PWDH | 8-input multiplexer 3-State |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 74LV245A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS |
| 74LV245APWJ | 功能描述:74LV245APW/SOT360/TSSOP20 制造商:nexperia usa inc. 系列:* 零件狀態(tài):在售 標準包裝:2,500 |
| 74LV245ATELL-E | 制造商:Renesas Electronics Corporation 功能描述:Bus XCVR Single 8-CH 3-ST 20-Pin TSSOP T/R Cut Tape |
| 74LV245ATPWJ | 功能描述:74LV245ATPW/SOT360/TSSOP20 制造商:nexperia usa inc. 系列:* 零件狀態(tài):在售 標準包裝:2,500 |
| 74LV245D | 功能描述:總線收發(fā)器 3.3V OCTAL BUS XCVR 3-S RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數量: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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