參數(shù)資料
型號： 74LV259
廠商： NXP Semiconductors N.V.
英文描述： 8-bit addressable latch
中文描述： 8位可尋址鎖存器
文件頁數(shù)： 2/14頁
文件大小： 126K
代理商： 74LV259
Philips Semiconductors
Product specification
74LV259
8-bit addressable latch
2
1998 May 20
853-1988 19420
FEATURES
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
Combines demultiplexer and 8-bit latch
Serial-to-parallel capability
Output from each storage bit available
Random (addressable) data entry
Easily expandable
Common reset input
Useful as a 3-to-8 active HIGH decoder
Output capability: standard
I
CC
category: MSI
DESCRIPTION
The 74LV259 is a low-voltage CMOS device and is pin and function
compatible with 74HC/HCT259.
The 74LV259 is a high-speed 8-bit addressable latch designed for
general purpose storage applications in digital systems. The
74LV259 is a multifunction device capable of storing single-line data
in eight addressable latches, and also 3-to-8 decoder and
demultiplexer, with active HIGH outputs (Q
0
to Q
7
), functions are
available. The 74LV259 also incorporate an active LOW common
reset (MR) for resetting all latches, as well as an active LOW enable
input (LE). The 74LV259 has four modes of operation as shown in
the mode select table. In the addressable latch mode, data on the
data line (D) is written into the addressed latch. The addressed latch
will follow the data input with all non-addressed latches remaining in
their previous states. In the memory mode, all latches remain in their
previous states and are unaffected by the data or address inputs.
In the 3-to-8 decoding or demultiplexing mode, the addressed output
follows the state of the D input with all other outputs in the LOW
state. In the reset mode all outputs are LOW and unaffected by the
address (A
0
to A
2
) and date (D) input. When operating the 74LV259
as an addressable latch, changing more than one bit of address
could impose a transient-wrong address. Therefore, this should only
be done while in the memory mode. The mode select table
summarizes the operations of the 74LV259.
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
D, A
to Q
n
LE to Q
n
MR to Q
n
Input capacitance
C
L
= 15 pF;
V
CC
= 3.3 V
17
16
14
ns
C
I
C
PD
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
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
3.5
pF
Power dissipation capacitance per latch
V
I
= GND to V
CC1
19
pF
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
16-Pin Plastic DIL
–40
°
C to +125
°
C
74LV259 N
74LV259 N
SOT38-4
16-Pin Plastic SO
–40
°
C to +125
°
C
74LV259 D
74LV259 D
SOT109-1
16-Pin Plastic SSOP Type II
–40
°
C to +125
°
C
74LV259 DB
74LV259 DB
SOT338-1
16-Pin Plastic TSSOP Type I
–40
°
C to +125
°
C
74LV259 PW
74LV259PW DH
SOT403-1
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參數(shù)描述
74LV259BQ 制造商:NXP Semiconductors 功能描述:IC 8BIT ADDRESS LATCH DHVQFN
74LV259BQ,115 功能描述:閉鎖 3.3V 8-BIT ADDRSSBLE RoHS:否 制造商:Micrel 電路數(shù)量:1 邏輯類型:CMOS 邏輯系列:TTL 極性:Non-Inverting 輸出線路數(shù)量:9 高電平輸出電流: 低電平輸出電流: 傳播延遲時間: 電源電壓-最大:12 V 電源電壓-最小:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-16 封裝:Reel
74LV259BQ-G 功能描述:閉鎖 3.3V 8-BIT ADDRSSBLE LATCH RoHS:否 制造商:Micrel 電路數(shù)量:1 邏輯類型:CMOS 邏輯系列:TTL 極性:Non-Inverting 輸出線路數(shù)量:9 高電平輸出電流: 低電平輸出電流: 傳播延遲時間: 電源電壓-最大:12 V 電源電壓-最小:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-16 封裝:Reel
74LV259D 功能描述:閉鎖 8BIT ADDRESSBL LATCH RoHS:否 制造商:Micrel 電路數(shù)量:1 邏輯類型:CMOS 邏輯系列:TTL 極性:Non-Inverting 輸出線路數(shù)量:9 高電平輸出電流: 低電平輸出電流: 傳播延遲時間: 電源電壓-最大:12 V 電源電壓-最小:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-16 封裝:Reel
74LV259D,112 功能描述:閉鎖 8BIT ADDRESSBL LATCH RoHS:否 制造商:Micrel 電路數(shù)量:1 邏輯類型:CMOS 邏輯系列:TTL 極性:Non-Inverting 輸出線路數(shù)量:9 高電平輸出電流: 低電平輸出電流: 傳播延遲時間: 電源電壓-最大:12 V 電源電壓-最小:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-16 封裝:Reel
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