Document
74AC244, 74ACT244 — Octal Buffer/Line Driver with 3-STATE Outputs
January 2008
74AC244, 74ACT244 Octal Buffer/Line Driver with 3-STATE Outputs
Features
■ ICC and IOZ reduced by 50% ■ 3-STATE outputs drive bus lines or buffer memory
address registers ■ Outputs source/sink 24mA ■ ACT244 has TTL-compatible inputs
General Description
The AC/ACT244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus-oriented transmitter/receiver which provides improved PC board density.
Ordering Information
Order Number
Package Number
Package Description
74AC244SC 74AC244SJ 74AC244MTC
74AC244PC 74ACT244SC
M20B M20D MTC20
N20A M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ACT244SJ 74ACT244MSA 74ACT244MTC
74ACT244PC
M20D MSA20 MTC20
N20A
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
All packages are lead free per JEDEC: J-STD-020B standard.
©1988 Fairchild Semiconductor Corporation 74AC244, 74ACT244 Rev. 1.4.0
www.fairchildsemi.com
74AC244, 74ACT244 — Octal Buffer/Line Driver with 3-STATE Outputs
Connection Diagram
Logic Symbol
IEEE/IEC
Pin Description
Pin Names
Description
OE1, OE2 I0–I7 O0–O7
3-STATE Output Enable Inputs Inputs Outputs
Truth Tables
Inputs
OE1 L
In L
LH
HX
Inputs
OE2 L
In L
LH
HX
X = Immaterial Z = High Impedance
Outputs (Pins 12, 14, 16, 18)
L H Z
Outputs (Pins 3, 5, 7, 9)
L H Z
©1988 Fairchild Semiconductor Corporation 74AC244, 74ACT244 Rev. 1.4.0
2
www.fairchildsemi.com
74AC244, 74ACT244 — Octal Buffer/Line Driver with 3-STATE Outputs
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol
Parameter
VCC IIK
VI IOK
VO IO ICC or IGND TSTG TJ
Supply Voltage DC Input Diode Current
VI = −0.5V VI = VCC + 0.5 DC Input Voltage DC Output Diode Current VO = −0.5V VO = VCC + 0.5V DC Output Voltage DC Output Source or Sink Current DC VCC or Ground Current per Output Pin Storage Temperature Junction Temperature
Rating −0.5V to +7.0V
−20mA +20mA −0.5V to VCC +.