PHILIPS N74F2244D Octal buffer with 30ohm equivalent output termination 3-state Datasheet

INTEGRATED CIRCUITS
74F2244
Octal buffer with 30Ω equivalent output
termination (3-State)
Product specification
IC15 Data Handbook
Philips Semiconductors
1994 Dec 5
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
FEATURES
74F2244
DESCRIPTION
• Octal bus interface
• 30Ω output termination ideal for driving DRAM
• 15mA source current
• SSOP Type II Package
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.
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F2244
4.0ns
30mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
DRAWING NUMBER
20-pin plastic DIP
N74F2244N
SOT146-1
20-pin plastic SOL
N74F2244D
SOT163-1
20-pin plastic SSOP Type II
N74F2244DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs
1.0/0.33
20µA/0.2mA
Output enable inputs (active low)
1.0/0.33
20µA/0.2mA
Yan, Ybn
Data outputs
750/8.33
NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state.
15mA/5mA
PINS
DESCRIPTION
Ian, Ibn
OEa, OEb
PIN CONFIGURATION
LOGIC SYMBOL
OEa 1
20 VCC
Ia0 2
19 OEb
Yb0 3
18 Ya0
Ia1 4
17 Ib0
Yb1 5
16 Ya1
1
OEa
Ia2 6
15 Ib1
19
OEb
Yb2 7
14 Ya2
Ia3 8
13 Ib2
Yb3 9
12 Ya3
GND 10
11 Ib3
4
6
Ia0
Ia1
Ia2
8
17
Ia3 Ib0
15
13
11
Ib1
Ib2
Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
18
16
14
12
3
5
7
9
VCC = Pin 20
GND = Pin 10
SF00228
SF00227
1994 Dec 05
2
2
853-1525 14380
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
IEC/IEEE SYMBOL
74F2244
LOGIC DIAGRAM
1
EN1
19
EN2
2
Ia0
2D
4
16
6
14
8
12
2
17
Ia1
18
1
Ia2
3
15
5
13
7
11
9
Ia3
OEa
2
18
4
16
6
14
8
12
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
1
OEb
17
2
15
5
13
7
11
9
Yb0
Yb1
Yb2
Yb3
10
VCC = Pin 20
GND = Pin 10
SF00229
SF00236
FUNCTION TABLE
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
L
L
L
L
L
H
L
H
H
H
H
X
H
X
Z
Z
Notes to function table
H = High voltage level
L = Low voltage level
X = Don’t care
Z = 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
RATING
UNIT
VCC
Supply voltage
PARAMETER
–0.5 to +7.0
V
VIN
Input voltage
–0.5 to +7.0
V
IIN
Input current
–30 to +5
mA
VOUT
Voltage applied to output in high output state
–0.5 to VCC
V
IOUT
Current applied to output in low output state
10
mA
Tamb
Operating free air temperature range
0 to +70
°C
Tstg
Storage temperature range
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
PARAMETER
UNIT
MIN
NOM
MAX
VCC
Supply voltage
4.5
5.0
5.5
VIH
High–level input voltage
2.0
VIL
Low–level input voltage
0.8
V
IIk
Input clamp current
–18
mA
IOH
High–level output current
–15
mA
IOL
Low–level output current
5
mA
Tamb
Operating free air temperature range
+70
°C
1994 Dec 05
0
3
V
V
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.)
SYMBOL
TEST
PARAMETER
VCC = MIN,
VOH
LIMITS
CONDITIONS1
IOH = –3mA
MIN
±10%VC
TYP2
MAX
2.5
UNIT
V
C
High-level output voltage
VIL = MAX,
±5%VCC
2.7
VIH = MIN
±10%VC
2.0
V
2.0
V
IOH =
–15mA
VCC = MIN,
VIL = MAX,
VOL
Low-level output voltage
VIK
Input clamp voltage
VCC = MIN, II = IIK
II
Input current at maximum input voltage
IIH
High–level input current
IIL
3.4
V
C
±5%VCC
IOL = MAX
±10%VC
0.50
V
0.42
0.50
V
–0.73
-1.2
V
VCC = MAX, VI = 7.0V
100
µA
VCC = MAX, VI = 2.7V
20
µA
Low–level input current
VCC = MAX, VI = 0.5V
–0.2
mA
IOZH
Off–state output current,
high–level voltage applied
VCC = MAX, VO = 2.7V
50
µA
IOZL
Off–state output current,
low–level voltage applied
VCC = MAX, VO = 0.5V
–50
µA
IOS
Short–circuit output current3
VCC = MAX
-150
mA
20
30
mA
ICC
Supply current (total)
45
65
mA
C
±5%VCC
VIH = MIN,
-60
ICCH
ICCL
VCC = MAX
ICCZ
26
40
mA
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 VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
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, IOS tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
Tamb = +25°C
SYMBOL
PARAMETER
TEST
CONDITION
Tamb = 0°C to +70°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
TYP
MAX
MIN
MAX
UNIT
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
3.0
2.5
4.5
4.5
7.0
7.0
2.5
2.5
8.0
7.5
ns
tPZH
tPZL
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
ns
tPHZ
tPLZ
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
ns
1994 Dec 05
4
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination
(3-State)
74F2244
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn
VM
OEn
VM
tPLH
VM
VM
tPZL
tPHL
tPLZ
3.5V
Yn
VM
VM
Yn
VM
VOL+0.3V
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
VM
OEn
VM
tPZH
tPHZ
VOH–0.3V
VM
Yn
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
TEST
SWITCH
tPLZ, tPZL
closed
All other
open
7.0V
VCC
tw
90%
NEGATIVE
PULSE
90%
VM
VM
10%
VIN
RL
VOUT
PULSE
GENERATOR
AMP (V)
10%
tTHL (tf )
tTLH (tr )
tTLH (tr )
tTHL (tf )
0V
D.U.T.
RT
CL
RL
Test circuit for 3-State outputs
DEFINITIONS:
RL = Load resistor; see AC electrical characteristics for
value.
CL = Load capacitance includes jig and probe
capacitance; see AC electrical characteristics for
value
RT = Termination resistance should be equal to ZOUT of
pulse generators.
AMP (V)
90%
90%
POSITIVE
PULSE
VM
VM
10%
10%
tw
0V
Input pulse definition
INPUT PULSE REQUIREMENTS
family
74F
amplitude
VM
rep. rate
3.0V
1.5V
1MHz
tw
tTLH
500ns 2.5ns
tTHL
2.5ns
SF000235
1994 Dec 05
5
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
DIP20: plastic dual in-line package; 20 leads (300 mil)
1994 Dec 05
6
74F2244
SOT146-1
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
SO20: plastic small outline package; 20 leads; body width 7.5 mm
1994 Dec 05
7
74F2244
SOT163-1
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
1994 Dec 05
8
74F2244
SOT339-1
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
NOTES
1994 Dec 05
9
74F2244
Philips Semiconductors
Product specification
Octal buffer with 30Ω equivalent output termination (3-State)
74F2244
DEFINITIONS
Data Sheet Identification
Product Status
Definition
Objective Specification
Formative or in Design
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Preliminary Specification
Preproduction Product
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.
Product Specification
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. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
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)
Document order number:
Date of release: July 1994
9397-750-05198
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