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HD74ALVCH16244
16-bit Buffers / Drivers with 3-state Outputs
ADE-205-133C (Z)
4th. Edition
December 1999
Description
The HD74ALVCH16244 is designed specifically to improve both the performance and density of three
state memory address drivers, clock drivers, and bus oriented receivers and transmitters. The device can be
used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. It provides true outputs and symmetrical
OE (active-low output-enable) inputs. Active bus hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
Features
• VCC = 2.3 V to 3.6 V
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
Function Table
Inputs Output Y
OE A
LHH
LLL
HXZ
H : High level
L : Low level
X : Immaterial
Z : High impedance
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HD74ALVCH16244
Pin Arrangement
1OE
1Y1
1Y2
GND
1Y3
1Y4
V
CC
2Y1
2Y2
GND
2Y3
2Y4
3Y1
3Y2
GND
3Y3
3Y4
V
CC
4Y1
4Y2
GND
4Y3
4Y4
4OE
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
2OE
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1A1
1A2
GND
1A3
1A4
V
CC
2A1
2A2
GND
2A3
2A4
3A1
3A2
GND
3A3
3A4
V
CC
4A1
4A2
GND
4A3
4A4
3OE
(Top view)
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HD74ALVCH16244
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage V
Input voltage
Output voltage
*1
*1, 2
Input clamp current I
Output clamp current I
Continuous output current I
VCC, GND current / pin ICC or I
Maximum power dissipation
at Ta = 55°C (in still air)
*3
CC
V
I
V
O
IK
OK
O
GND
P
T
Storage temperature Tstg –65 to 150 °C
Notes: Stresses beyond those listed under “absolute maximum ratings” 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.
1. The input and output negative voltage ratings may be exceeded if the input and output clamp
current ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The maximum package power dissipation is calculated using a junction temperature of 150°C
and a board trace length of 750 mils.
–0.5 to 4.6 V
–0.5 to 4.6 V
–0.5 to VCC +0.5 V
–50 mA VI < 0
±50 mA VO < 0 or VO > V
±50 mA VO = 0 to V
CC
±100 mA
0.85 W TSSOP
CC
Recommended Operating Conditions
Item Symbol Min Max Unit Conditions
Supply voltage V
Input voltage V
Output voltage V
High level output current I
Low level output current I
CC
I
O
OH
OL
Input transition rise or fall rate ∆t / ∆v 0 10 ns / V
Operating temperature Ta –40 85 °C
Note: Unused control inputs must be held high or low to prevent them from floating.
2.3 3.6 V
0VCCV
0VCCV
— –12 mA VCC = 2.3 V
— –12 VCC = 2.7 V
— –24 VCC = 3.0 V
—12mAV
—12 V
—24 V
= 2.3 V
CC
= 2.7 V
CC
= 3.0 V
CC
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HD74ALVCH16244
Logic Diagram
1OE
1A1
1A2
1A3
1A4
3OE
3A1
3A2
3A3
47
46
44
43
25
36
35
33
1
2
1Y1
3
1Y2
5
1Y3
6
1Y4
13
3Y1
14
3Y2
16
3Y3
2OE
2A1
2A2
2A3
2A4
4OE
4A1
4A2
4A3
48
41
40
38
37
24
30
29
27
11
12
19
20
22
8
2Y1
9
2Y2
2Y3
2Y4
4Y1
4Y2
4Y3
3A4
32
17
3Y4
4A4
26
23
4Y4
4
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Electrical Characteristics (Ta = –40 to 85°C)
HD74ALVCH16244
Item Symbol V
Input voltage V
IH
(V) *1Min Max Unit Test Conditions
CC
2.3 to 2.7 1.7 — V
2.7 to 3.6 2.0 —
V
2.3 to 2.7 — 0.7
IL
2.7 to 3.6 — 0.8
Output voltage V
Min to Max VCC–0.2 — V IOH = –100 µA
OH
2.3 2.0 — IOH = –6 mA, VIH = 1.7 V
2.3 1.7 — IOH = –12 mA, VIH = 1.7 V
2.7 2.2 — IOH = –12 mA, VIH = 2.0 V
3.0 2.4 — IOH = –12 mA, VIH = 2.0 V
3.0 2.0 — IOH = –24 mA, VIH = 2.0 V
V
Min to Max — 0.2 IOL = 100 µA
OL
2.3 — 0.4 IOL = 6 mA, VIL = 0.7 V
2.3 — 0.7 IOL = 12 mA, VIL = 0.7 V
2.7 — 0.4 IOL = 12 mA, VIL = 0.8 V
3.0 — 0.55 IOL = 24 mA, VIL = 0.8 V
Input current I
IN
I
IN (hold)
3.6 — ±5 µAVIN = VCC or GND
2.3 45 — VIN = 0.7 V
2.3 –45 — VIN = 1.7 V
3.0 75 — VIN = 0.8 V
3.0 –75 — VIN = 2.0 V
3.6 — ±500 VIN = 0 to 3.6 V
Off state output current *2I
Quiescent supply current I
OZ
CC
∆I
3.6 — ±10 µAV
= VCC or GND
OUT
3.6 — 40 µAVIN = VCC or GND
3.0 to 3.6 — 750 µAVIN = one input at (VCC–0.6)
CC
V,
other inputs at V
or GND
CC
Notes: 1. For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
2. For I/O ports, the parameter I
includes the input leakage current.
OZ
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HD74ALVCH16244
Switching Characteristics (Ta = –40 to 85°C)
Item Symbol VCC (V) Min Typ Max Unit FROM
(Input)TO(Output)
Propagation delay time t
Output enable time t
Output disable time t
Input capacitance C
Output capacitance C
PLH
t
PHL
ZH
t
ZL
HZ
t
LZ
IN
O
2.5±0.2 1.0 — 3.9 ns A Y
2.7 — — 3.6
3.3±0.3 1.0 — 3.0
2.5±0.2 1.0 — 5.7 ns OE Y
2.7 — — 5.4
3.3±0.3 1.0 — 4.4
2.5±0.2 1.0 — 5.2 ns OE Y
2.7 — — 4.6
3.3±0.3 1.0 — 4.1
3.3 — 3.0 — pF Control inputs
3.3 — 6.0 — Data inputs
3.3 — 7.0 — pF Outputs
• Test Circuit
See under table
500 Ω
*1
L
500 ΩC = 50 pF
S1
GND
Load Circuit for Outputs
Symbol
t / t
PLH PHL
t / t
ZH HZ
t / t
ZL LZ
Note: 1. C includes probe and jig capacitance.
L
Vcc=2.5±0.2V
OPEN OPEN
GND
4.6 V 6.0 V
Vcc=2.7V,
3.3±0.3V
GND
OPEN
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HD74ALVCH16244
• Waveforms – 1
Input
Output
• Waveforms – 2
Output
Control
Waveform - A
Waveform - B
10 %
90 %
90 %
V
ref
tf
V
IH
10 %
t
PHL
V
ref
GND
V
OH
V
OL
tr
90 %
V
ref
t
PLH
V
ref
trtf
V
V
ref
V
ref
10 % 10 %
90 %
t
ZL
V
ref
t
ZH
V
ref
t
LZ
V + 0.3 V
OL
t
HZ
V – 0.3 V
OH
IH
GND
≈V
OH1
V
OL
V
OH
≈V
OL1
TEST
V
IH
V
ref
V
OH1
V
OL1
Vcc=2.5±0.2V
2.3 V 2.7 V
1.2 V 1.5 V
2.3 V 3.0 V
GND
Vcc=2.7V,
3.3±0.3V
GND
Notes: 1. All input pulses are supplied by generators having the following characteristics:
PRR ≤ 10 MHz, Zo = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
2. Waveform – A is for an output with internal conditions such that the output is low
except when disabled by the output control.
3. Waveform – B is for an output with internal conditions such that the output is high
except when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
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HD74ALVCH16244
Package Dimensions
12.50
+0.3
–0.1
Unit : mm
2548
+0.3
–0.1
6.10
124
+0.1
0.20
–0.05
0.50
0.08
M
0.65 Max
0.10
0.05 Min
1.20 max
8.10 ± 0.3
0.15 ± 0.05
Hitachi code
EIAJ code
JEDEC code
10° Max
0.50 ± 0.1
TTP-48DC
—
—
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HD74ALVCH16244
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
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