Rev.2.00, Jul.16.2004, page 1 of 8
HD74AC244/HD74ACT244
Octal Buffer/Line Driver with 3-State Output REJ03D0262–0200Z
(Previous ADE-205-3 83 (Z))
Rev.2.00
Jul.16.2004
Description
The HD74AC244/HD74ACT244 is an octal buffer and line driver designed to be employed as a memory address driver,
clock driver and bus-oriented transmitter/receive which provides improved PC board density.
Features
• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Outputs Source/Sink 24 mA
• HD74ACT244 has TTL-Compatible Inputs
• Ord ering I nformation: Ex. HD74AC24 4
Part Name Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity)
HD74AC244P DIP-20 pin DP-20N, -20NEV P —
HD74AC244FPEL SOP-20 pin (JEITA) FP-20DAV FP EL (2,000 pcs/reel)
HD74AC244RPEL SOP-20 pin (JEDEC) FP-20DBV RP EL (1,000 pcs/reel)
HD74AC244TELL TSSOP-20 pin TTP-20DAV T ELL (2,000 pcs/reel)
Notes: 1. Please consult the sales office for the above package availability.
2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of
the package code.
Pin Arrangement
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
GND
OE1V
CC
OE2
(Top view)
1A
1
2Y
4
1A
2
2Y
3
1A
3
2Y
2
1A
4
2Y
1
1Y
1
2A
4
1Y
2
2A
3
1Y
3
2A
2
2A
1
1Y
4
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 2 of 8
Truth Tables
Inputs Outputs (Pins 12, 14, 16, 18)
OE
OEOE
OE1AY
LLL
LHH
HXZ
Inputs Outputs (Pins 3, 5, 7, 9)
OE
OEOE
OE2AY
LLL
LHH
HXZ
H : High Voltage Level
L : Low Voltage Level
X : Immaterial
Z : High Impedance
Absolute Maximum Ratings
Item Symbol Ratings Unit Condition
Supply voltage VCC –0.5 to 7 V
–20 mA VI = –0.5VDC input diode current IIK 20 mA VI = Vcc+0.5V
DC input voltage VI–0.5 to Vcc+0.5 V
–50 mA VO = –0.5VDC output diode current IOK 50 mA VO = Vcc+0.5V
DC output voltage VO–0.5 to Vcc+0.5 V
DC output source or sink current IO±50 mA
DC VCC or ground current per output pin ICC, IGND ±50 mA
Storage temperature Tstg –65 to +150 °C
Recommended Operating Conditions: HD74AC244
Item Symbol Ratings Unit Condition
Supply voltage VCC 2 to 6 V
Input and Output voltage VI, VO0 to VCC V
Operating temperature Ta –40 to +85 °CVCC = 3.0V
VCC = 4.5 V
Input rise and fall time
(except Schmitt inputs)
VIN 30% to 70% VCC
tr, tf 8 ns/V
VCC = 5.5 V
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 3 of 8
DC Characteristics: HD74AC244
Ta = 25°
°°
°C Ta = –40 to
+85°
°°
°C
Item Sym-
bol Vcc
(V) min. typ. max. min. max.
Unit Condition
3.0 2.1 1.5 — 2.1 —
4.5 3.15 2.25 — 3.15 —
VIH
5.5 3.85 2.75 — 3.85 —
VOUT = 0.1 V or VCC –0.1 V
3.0 — 1.50 0.9 — 0.9
4.5 — 2.25 1.35 — 1.35
Input Voltage
VIL
5.5 — 2.75 1.65 — 1.65
V
VOUT = 0.1 V or VCC –0.1 V
3.0 2.9 2.99 — 2.9 —
4.5 4.4 4.49 — 4.4 —
5.5 5.4 5.49 — 5.4 —
VIN = VIL or VIH
IOUT = –50 µA
3.0 2.58 — — 2.48 — IOH = –12 mA
4.5 3.94 — — 3.80 — IOH = –24 mA
VOH
5.5 4.94 — — 4.80 —
VIN = VIL or VIH
IOH = –24 mA
3.0 — 0.002 0.1 — 0.1
4.5 — 0.001 0.1 — 0.1
5.5 — 0.001 0.1 — 0.1
VIN = VIL or VIH
IOUT = 50 µA
3.0 — — 0.32 — 0.37 IOL = 12 mA
4.5 — — 0.32 — 0.37 IOL = 24 mA
Output voltage
VOL
5.5 — — 0.32 — 0.37
V
VIN = VIL or VIH
IOL = 24 mA
Input leakage
current IIN 5.5 — — ±0.1 — ±1.0 µAV
IN = VCC or GND
3 State current IOZ 5.5 — — ±0.5 — ±5.0 µAV
IN(OE) = VIL, VIH
VIN = VCC or GND
VOUT = VCC or GND
IOLD 5.5———86—mAV
OLD = 1.1 VDynamic outp ut
current*IOHD 5.5 — — — –75 — mA VOHD = 3.85 V
Quiescent su pply
current ICC 5.5 — — 8.0 — 80 µAV
IN = VCC or ground
*Maximum test duration 2.0 ms, one output loaded at a time.
Recommended Operating Conditions: HD74ACT244
Item Symbol Ratings Unit Condition
Supply voltage VCC 2 to 6 V
Input and output voltage VI, VO0 to VCC V
Operating temperature Ta –40 to +85 °C
Input rise and fall time
(except Schmitt inputs)
VIN 0.8 to 2.0 V
tr, tf 8 ns/V VCC = 4.5V
VCC = 5.5V
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 4 of 8
DC Characteristics: HD74ACT244
Ta = 25°
°°
°C Ta = –40 to
+85°
°°
°C
Item Sym-
bol VCC
(V) min. typ. max. min. max.
Unit Condition
4.5 2.0 1.5 — 2.0 —VIH 5.5 2.0 1.5 — 2.0 — VOUT = 0.1 V or VCC–0.1 V
4.5 — 1.5 0.8 — 0.8
Input voltage
VIL 5.5 — 1.5 0.8 — 0.8
V
VOUT = 0.1 V or VCC –0.1 V
4.5 4.4 4.49 — 4.4 —
5.5 5.4 5.49 — 5.4 — VIN = VIL or VIH
IOUT = –50 µA
4.5 3.94 — — 3.80 — IOH = –24 mA
VOH
5.5 4.94 — — 4.80 — VIN = VIL IOH = –24 mA
4.5 — 0.001 0.1 — 0.1
5.5 — 0.001 0.1 — 0.1 VIN = VIL or VIH
IOUT = 50 µA
4.5 — — 0.32 — 0.37 IOL = 24 mA
Output voltage
VOL
5.5 — — 0.32 — 0.37
V
VIN = VIL IOL = 24 mA
Input current IIN 5.5 — — ±0.1 — ±1.0 µAV
IN = VCC or GND
3 State current IOZ 5.5 — — ±0.5 — ±5.0 µAV
IN = VIL, VIH
VOUT = VCC or GND
ICC/input current ICCT 5.5 — 0.6 — — 1.5 mA VIN = VCC–2.1 V
IOLD 5.5 — — — 86 — mA VOLD = 1.1 VDynamic outp ut
current*IOHD 5.5 — — — –75 — mA VOHD = 3.85 V
Quiescent su pply
current ICC 5.5 — — 8.0 — 80 µAV
IN = VCC or ground
*Maximum test duration 2.0 ms, one output loaded at a time.
AC Characteristics: HD74AC244
Ta = +25°C
CL = 50 pF Ta = –40°C to +85°C
CL = 50 pF
Item Symbol VCC (V)*1Min Typ Max Min Max Unit
Propagation delay tPLH 3.3 1.0 6.5 9.0 1.0 10.0 ns
Data to output 5.0 1.0 5.0 7.0 1.0 7.5
Propagation delay tPHL 3.3 1.0 6.5 9.0 1.0 10.0 ns
Data to output 5.0 1.0 5.0 7.0 1.0 7.5
Output enable time tZH 3.3 1.0 6.0 10.5 1.0 11.0 ns
5.0 1.0 5.0 7.0 1.0 8.0
Output enable time tZL 3.3 1.0 7.5 10.0 1.0 11.0 ns
5.0 1.0 5.5 8.0 1.0 8.5
Output disable time tHZ 3.3 1.0 7.0 10.0 1.0 10.5 ns
5.0 1.0 6.5 9.0 1.0 9.5
Output disable time tLZ 3.3 1.0 7.5 10.5 1.0 11.5 ns
5.0 1.0 6.5 9.0 1.0 9.5
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 5 of 8
AC Characteristics: HD74ACT244
Ta = +25°C
CL = 50 pF Ta = –40°C to +85°C
CL = 50 pF
Item Symbol VCC (V)*1Min Typ Max Min Max Unit
Propagation delay
Data to output tPLH 5.0 1.0 6.5 9.0 1.0 10.0 ns
Propagation delay
Data to output tPHL 5.0 1.0 7.0 9.0 1.0 10.0 ns
Output enable time tZH 5.0 1.0 6.0 8.5 1.0 9.5 ns
Output enable time tZL 5.0 1.0 7.0 9.5 1.0 10.5 ns
Output disable time tHZ 5.0 1.0 7.0 9.5 1.0 10.5 ns
Output disable time tLZ 5.0 1.0 7.5 10.0 1.0 10.5 ns
Note: 1. Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item Symbol Typ Unit Condition
Input capacitan ce CIN 4.5 pF VCC = 5.5 V
Power dissipation capacitance CPD 45.0 pF VCC = 5.0 V
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 6 of 8
Package Dime nsions
Package Code
JEDEC
JEITA
Mass
(reference value)
DP-20N
—
Conforms
1.26 g
0.51 Min
2.54 Min 5.08 Max
7.62
0.25
+ 0.11
– 0.05
2.54 ± 0.25 0.48 ± 0.10
24.50
25.40 Max
0.89 1.30
6.30
7.00 Max
110
1120
0˚ – 15˚
1.27 Max
As of January, 2003
Unit: mm
Package Code
JEDEC
JEITA
Mass
(reference value)
DP-20NEV
—
Conforms
1.26 g
0.51 Min
2.54 Min 5.08 Max
7.62
*0.25 ± 0.06
2.54 ± 0.25 *0.48 ± 0.08
*NI/Pd/AU Plating
24.50
25.40 Max
0.89 1.30
6.30
7.00 Max
110
1120
0˚ – 15˚
1.27 Max
Unit: mm
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 7 of 8
Package Code
JEDEC
JEITA
Mass
(reference value)
FP-20DAV
—
Conforms
0.31 g
*Ni/Pd/Au plating
*0.40 ± 0.06
0.12
0.15
M
20
10
1
*0.20 ± 0.05
0.80 Max
11
12.6
5.5
2.20 Max
13 Max
0
˚
– 8
˚
0.70 ± 0.20
+ 0.20
– 0.30
7.80
1.27
0.10 ± 0.10
1.15
As of January, 2003
Unit: mm
Package Code
JEDEC
JEITA
Mass
(reference value)
FP-20DBV
Conforms
—
0.52 g
*Ni/Pd/Au plating
0.12
0.15
0˚ – 8˚
M
20 11
0.20 ± 0.10
1
1.27
10
12.8
13.2 Max
7.50
2.65 Max
*0.25 ± 0.05
*0.40 ± 0.06
+ 0.57
– 0.30
0.70
+ 0.25
– 0.40
10.40
1.45
0.935 Max
As of January, 2003
Unit: mm
HD74AC244/HD74ACT244
Rev.2.00, Jul.16.2004, page 8 of 8
Package Code
JEDEC
JEITA
Mass
(reference value)
TTP-20DAV
—
—
0.07 g
*Ni/Pd/Au plating
0.50 ± 0.10
0˚ – 8˚
*0.15 ± 0.05
6.40 ± 0.20
0.10
1.10 Max
0.13 M
0.65
110
20 11
4.40
6.50
6.80 Max
*0.20 ± 0.05
0.07+0.03
–0.04
1.0
0.65 Max
As of January, 2003
Unit: mm
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