Philips 74lvt2244 DATASHEETS
INTEGRATED CIRCUITS
74LVT2244
3.3V Octal buffer/line driver with 30Ω
series termination resistors (3-State)
Product specification
Supersedes data of 1996 Aug 28
IC23 Data Handbook
1998 Feb 19
Philips Semiconductors Product specification
3.3V Octal buffer/line driver with 30Ω
series termination resistors (3-State)
FEA TURES
•Octal bus interface
•3-State buffers
•Output capability: +12mA/-12mA
•TTL input and output switching levels
•Input and output interface capability to systems at 5V supply
•Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
•Power-up 3-State
•Live insertion/extraction permitted
•No bus current loading when output is tied to 5V bus
•Latch-up protection exceeds 500mA per JEDEC Std 17
•ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
•Outputs include series resistance of 30Ω, making external
termination resistors unnecessary.
QUICK REFERENCE DATA
SYMBOL PARAMETER
C
t
PLH
t
PHL
C
OUT
I
CCZ
IN
Propagation delay
nAx to nYx
CL = 50pF;
VCC = 3.3V
Input capacitance VI = 0V or 3.0V 4 pF
Output capacitance Outputs disabled; VO = 0V or 3.0V 7 pF
Total supply current Outputs disabled; VCC = 3.6V 0.13 mA
74L VT2244
DESCRIPTION
The LVT2244 is a high-performance BiCMOS product designed for
V
operation at 3.3V .
CC
This device is an octal buffer that is ideal for driving bus lines. The
device features two Output Enables (OE
four of the 3-State outputs.
The 74LVT2244 is designed with 30Ω series resistance in both the
High and Low states of the output. This design reduces the line
noise in applications such as memory address drivers, clock drivers
and bus receivers/transmitters.
CONDITIONS
T
= 25°C; GND = 0V
amb
1, OE2), each controlling
TYPICAL UNIT
2.9
2.9
ns
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER
20-Pin Plastic SOL –40°C to +85°C 74LVT2244 D 74LVT2244 D SOT163-1
20-Pin Plastic SSOP Type II –40°C to +85°C 74LVT2244 DB 74LVT2244 DB SOT339-1
20-Pin Plastic TSSOP Type I –40°C to +85°C 74LVT2244 PW 7LVT2244PW DH SOT360-1
PIN CONFIGURATION
1
1OE
2
1A0
3
2Y3
4
1A1
5
2Y2
6
1A2
7
2Y1
8
1A3
9
2Y0 1Y3
10 11
GND
20
V
CC
2OE
19
1Y0
18
2A3
17
1Y1
16
2A2
15
1Y2
14
2A1
13
12
2A0
SV00010
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
2, 4, 6, 8 1A0 – 1A3 Data inputs
11. 13, 15, 17 2A0 – 2A3 Data inputs
18, 16, 14, 12 1Y0 – 1Y3 Data outputs
9, 7, 5, 3 2Y0 – 2Y3 Data outputs
1, 19 1OE, 2OE Output enables
10 GND Ground (0V)
20 V
CC
Positive supply voltage
1998 Feb 19 853-1867 18985
2
Philips Semiconductors Product specification
I
DC out ut current
mA
3.3V Octal buffer/line driver with 30Ω
series termination resistors (3-State)
LOGIC SYMBOL
1A0
2
1A1
4
1A2
6
1A3
8
1OE
1
2A0
11
2A1
13
2A2
15
2A3
17
2OE
19
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
18
16
14
12
9
7
5
3
SV00011
LOGIC SYMBOL (IEEE/IEC)
1
EN
2
4
6
8
19
EN
11 9
13 7
15 5
17 3
74LVT2244
18
16
14
12
SV00012
FUNCTION TABLE
SCHEMATIC OF EACH OUTPUT
INPUTS OUTPUTS
V
nOE1 nAx nYx
V
CC
CC
L L L
L H H
H X Z
H =High voltage level
L =Low voltage level
X = Don’t care
22Ω
OUTPUT
20Ω
Z =High impedance “off” state
SW00202
ABSOLUTE MAXIMUM RA TINGS
SYMBOL
V
CC
V
I
V
OUT
OUT
I
IK
I
OK
T
stg
DC supply voltage –0.5 to +4.6 V
DC input voltage
DC output voltage
p
DC input diode current VI < 0 –50 mA
DC output diode current VO < 0 –50 mA
Storage temperature range –65 to 150 °C
PARAMETER CONDITIONS RATING UNIT
3
3
1, 2
–0.5 to +7.0 V
Output in Off or High state –0.5 to +7.0 V
Output in Low state 128
Output in High state –64
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability .
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Feb 19
3
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