參數(shù)資料
型號(hào): 935221210005
廠商: NXP SEMICONDUCTORS
元件分類: 總線收發(fā)器
英文描述: LV/LV-A/LVX/H SERIES, OCTAL 1-BIT DRIVER, TRUE OUTPUT, UUC
封裝: CHIP ON WAFER
文件頁(yè)數(shù): 7/14頁(yè)
文件大?。?/td> 168K
代理商: 935221210005
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
2
1998 May 20
853–1924 19420
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 VCC = 3.6 V
Typical V
OLP (output ground bounce) < 0.8 V at VCC = 3.3 V,
Tamb = 25°C
Typical V
OHV (output VOH undershoot) > 2 V at VCC = 3.3 V,
Tamb = 25°C
Output capability: bus driver
I
CC category: MSI
DESCRIPTION
The 74LV244 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT244.
The 74LV244 is an octal non-inverting buffer/line driver with 3-State
outputs. The 3-State outputs are controlled by the output enable
inputs 1OE and 2OE. A HIGH on nOE causes the outputs to
assume a high impedance OFF-state. The 74LV244 is identical to
the 74LV240 but has non-inverting outputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
tPHL/tPLH
Propagation delay
1An to 1Yn;
2An to 2Yn
CL = 15 pF;
VCC = 3.3 V
8.0
ns
CI
Input capacitance
3.5
pF
CPD
Power dissipation capacitance per buffer
VCC = 3.3 V
VI = GND to VCC1
35
pF
NOTE:
1. CPD is used to determine the dynamic power dissipation (PD in W)
PD = CPD
VCC2
fi ) (CL
VCC2
fo) where:
fi = input frequency in MHz; CL = output load capacitance in pF;
fo = output frequency in MHz; VCC = supply voltage in V;
(CL
VCC2
fo) = sum of the outputs.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
20-Pin Plastic DIL
–40
°C to +125°C
74LV244 N
SOT146-1
20-Pin Plastic SO
–40
°C to +125°C
74LV244 D
SOT163-1
20-Pin Plastic SSOP Type II
–40
°C to +125°C
74LV244 DB
SOT339-1
20-Pin Plastic TSSOP Type I
–40
°C to +125°C
74LV244 PW
74LV244PW DH
SOT360-1
PIN CONFIGURATION
SV00620
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND
2A3
1Y3
2A2
1Y2
2A1
1Y1
2A0
1Y0
2OE
VCC
LOGIC SYMBOL
SV00621
1Y0
2Y0
18
3
1Y1
2Y1
16
5
1Y2
2Y2
14
7
1Y3
2Y3
12
9
1A0
2A0
2
17
1A1
2A1
4
15
1A2
2A2
6
13
1A3
2A3
8
11
1OE
1
2OE
19
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