74F2244 [NXP]
Octal buffer with 30ohm equivalent output termination 3-State; 与30ohm相当于输出端接三态八路缓冲器
| 型号： | 74F2244 |
| 厂家： | 
NXP |
| 描述： | Octal buffer with 30ohm equivalent output termination 3-State |
| 文件： | 总10页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74F2244
Octal buffer with 30Ω equivalent output
termination (3-State)
Product specification
IC15 Data Handbook
1994 Dec 5
Philip s Se m ic ond uc tors
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
74F2244
FEATURES
• Octal bus interface
DESCRIPTION
The 74F2244 is an octal buffer that is ideal for driving dynamic
DRAM with matching impedance. The outputs are all capable of
sinking 5mA and sourcing up to 15mA. The device features two
output enables, OEa and OEb, each controlling four of the 3–state
outputs.
• 30Ω output termination ideal for driving DRAM
• 15mA source current
• SSOP Type II Package
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
TYPE
74F2244
4.0ns
30mA
ORDERING INFORMATION
ORDER CODE
COMMERCIAL RANGE
= 5V ±10%, T = 0°C to +70°C
DESCRIPTION
DRAWING NUMBER
V
CC
amb
20-pin plastic DIP
20-pin plastic SOL
N74F2244N
N74F2244D
N74F2244DB
SOT146-1
SOT163-1
SOT339-1
20-pin plastic SSOP Type II
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
PINS
DESCRIPTION
Ian, Ibn
Data inputs
1.0/0.33
20µA/0.2mA
20µA/0.2mA
OEa, OEb
Yan, Ybn
Output enable inputs (active low)
Data outputs
1.0/0.33
750/8.33
15mA/5mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state.
PIN CONFIGURATION
LOGIC SYMBOL
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
OEa
Ia0
V
CC
2
4
6
8
17 15 13 11
OEb
Ya0
Yb0
Ia1
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
Ib0
Yb1
Ia2
Ya1
1
OEa
OEb
19
Ib1
Yb2
Ia3
Ya2
Ib2
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
Yb3
Ya3
Ib3
18
16 14 12
3
5
7
9
GND 10
V
= Pin 20
GND = Pin 10
CC
SF00228
SF00227
2
1994 Dec 05
853-1525 14380
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
74F2244
IEC/IEEE SYMBOL
LOGIC DIAGRAM
1
EN1
EN2
17
15
2
2
4
18
16
Ib0
Ib1
Ib2
Ib3
OEb
Yb0
Ia0
Ia1
Ya0
Ya1
Ya2
Ya3
19
5
Yb1
2
4
18
2D
1
16
14
13
7
6
8
14
12
Yb2
6
Ia2
12
3
8
11
10
9
Yb3
17
2
Ia3
5
15
13
11
1
7
OEa
9
V
= Pin 20
CC
GND = Pin 10
SF00229
SF00236
FUNCTION TABLE
INPUTS
OUTPUTS
OEa
L
Ia
L
OEb
Ib
L
Ya
Yb
L
L
L
L
H
Z
L
H
X
H
X
H
Z
H
H
Notes to function table
H = High voltage level
L
X
Z
=
=
=
Low voltage level
Don’t care
High impedance ”off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the
operating free air temperature range.)
SYMBOL
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
UNIT
V
V
CC
V
IN
Supply voltage
Input voltage
Input current
V
I
IN
mA
V
I
Voltage applied to output in high output state
Current applied to output in low output state
–0.5 to V
V
OUT
CC
10
mA
°C
°C
OUT
T
amb
Operating free air temperature range
Storage temperature range
0 to +70
T
stg
–65 to +150
RECOMMENDED OPERATING CONDITIONS
LIMITS
UNIT
SYMBOL
PARAMETER
PARAMETER
MIN
4.5
NOM
MAX
V
Supply voltage
5.0
5.5
V
V
CC
IH
IL
V
V
High–level input voltage
Low–level input voltage
Input clamp current
2.0
0.8
–18
–15
5
V
I
I
I
mA
mA
mA
Ik
High–level output current
Low–level output current
OH
OL
T
amb
Operating free air temperature range
0
+70
°C
3
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
74F2244
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
TEST
LIMITS
SYMBOL
PARAMETER
UNIT
1
2
CONDITIONS
= –3mA
MIN TYP
MAX
±10%V
V
V
V
= MIN,
I
2.5
V
V
V
V
C
CC
OH
C
V
OH
High-level output voltage
±5%V
= MAX,
= MIN
2.7
2.0
2.0
3.4
CC
IL
±10%V
I
=
C
IH
OH
–15mA
C
±5%V
CC
V
V
= MIN,
= MAX,
±10%V
CC
IL
C
V
V
Low-level output voltage
I
OL
= MAX
0.50
0.50
V
OL
C
V
V
V
V
V
= MIN,
±5%V
0.42
V
V
IH
CC
Input clamp voltage
= MIN, I = I
IK
–0.73 -1.2
IK
CC
CC
CC
CC
I
I
I
I
Input current at maximum input voltage
High–level input current
= MAX, V = 7.0V
100
20
µA
µA
mA
I
I
= MAX, V = 2.7V
IH
IL
I
Low–level input current
= MAX, V = 0.5V
–0.2
I
Off–state output current,
high–level voltage applied
µA
µA
I
V
= MAX, V = 2.7V
50
OZH
CC
O
Off–state output current,
low–level voltage applied
I
I
V
V
= MAX, V = 0.5V
–50
OZL
CC
O
3
Short–circuit output current
= MAX
= MAX
-60
-150
mA
mA
mA
mA
OS
CC
I
I
20
45
26
30
65
40
CCH
I
Supply current (total)
I
V
CC
CC
CCL
CCZ
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V = 5V, T
= 25°C.
amb
CC
3. Not more than one output should be shorted at a time. For testing I , the use of high-speed test apparatus and/or sample-and-hold
OS
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I tests should be performed last.
OS
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
T
= +25°C
= +5.0V
= 0°C to +70°C
= +5.0V ± 10%
amb
amb
V
SYMBOL
PARAMETER
TEST
V
UNIT
CC
CC
CONDITION
C
= 50pF, R = 500Ω
C
= 50pF,
R = 500Ω
L
L
L
L
MIN
TYP
MAX
MIN
MAX
t
t
Propagation delay
Ian, Ibn to Yn
3.0
2.5
4.5
4.5
7.0
7.0
2.5
2.5
8.0
7.5
PLH
PHL
Waveform 1
ns
ns
ns
t
t
Output enable time
to high or low level
Waveform 2
Waveform 3
2.5
3.0
4.5
5.0
7.5
8.0
2.0
3.0
8.0
8.5
PZH
PZL
t
t
Output disable time
from high or low level
Waveform 2
Waveform 3
1.5
1.5
3.5
2.5
6.0
5.5
1.0
1.0
6.0
5.5
PHZ
PLZ
4
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
74F2244
AC WAVEFORMS
For all waveforms, V = 1.5V.
M
Ian, Ibn
OEn
Yn
V
V
M
M
V
M
V
M
t
t
PLZ
PZL
t
t
PHL
PLH
3.5V
V
M
Yn
V
V
M
M
V
+0.3V
OL
SF00234
SF00231
Waveform 3. 3-State output enable time to low level
and output disable time from low level
Waveform 1. Propagation delay for data to outputs
V
V
M
M
t
OEn
Yn
t
PZH
PHZ
V
–0.3V
OH
V
M
0V
SF00233
Waveform 2. 3-State output enable time to high level
and output disable time from high level
TEST CIRCUIT AND WAVEFORMS
SWITCH POSITION
t
w
AMP (V)
0V
TEST
SWITCH
closed
open
90%
90%
7.0V
V
CC
NEGATIVE
PULSE
t
, t
PLZ PZL
V
V
M
M
All other
10%
10%
R
L
V
V
OUT
IN
t
t
)
)
t
t )
THL ( f
TLH ( r
PULSE
GENERATOR
D.U.T.
t
t
t
t )
TLH ( r
THL ( f
R
C
R
L
AMP (V)
0V
T
L
90%
M
90%
POSITIVE
PULSE
V
V
M
Test circuit for 3-State outputs
DEFINITIONS:
10%
10%
t
w
R
=
Load resistor; see AC electrical characteristics for
value.
Load capacitance includes jig and probe
capacitance; see AC electrical characteristics for
value
Input pulse definition
INPUT PULSE REQUIREMENTS
L
C
=
L
family
V
M
rep. rate
t
t
t
THL
amplitude
w
TLH
R
T
=
Termination resistance should be equal to Z
pulse generators.
of
OUT
74F
3.0V
1.5V
1MHz
500ns 2.5ns
2.5ns
SF000235
5
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
6
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
7
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
8
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
NOTES
9
1994 Dec 05
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
DEFINITIONS
Data Sheet Identification
Product Status
Definition
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Objective Specification
Formative or in Design
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Preliminary Specification
Product Specification
Preproduction Product
Full Production
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Philips Semiconductors and Philips Electronics North America Corporation
register eligible circuits under the Semiconductor Chip Protection Act.
Copyright Philips Electronics North America Corporation 1994
All rights reserved. Printed in U.S.A.
(print code)
Date of release: July 1994
9397-750-05198
Document order number:
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