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74ABT244 데이터시트 PDF




Fairchild Semiconductor에서 제조한 전자 부품 74ABT244은 전자 산업 및 응용 분야에서
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부품번호 74ABT244 기능
기능 Octal Buffer/Line Driver with 3-STATE Outputs
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74ABT244 데이터시트, 핀배열, 회로
May 1992
Revised November 1999
74ABT244
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The ABT244 is an octal buffer and line driver with 3-STATE
outputs designed to be employed as a memory and
address driver, clock driver, or bus-oriented transmitter/
receiver.
Features
s Non-inverting buffers
s Output sink capability of 64 mA, source capability of
32 mA
s Guaranteed output skew
s Guaranteed multiple output switching specifications
s Output switching specified for both 50 pF and 250 pF
loads
s Guaranteed simultaneous switching, noise level and
dynamic threshold performance
s Guaranteed latchup protection
s High impedance glitch free bus loading during entire
power up and power down cycle
s Nondestructive hot insertion capability
s Disable time less than enable time to avoid bus conten-
tion
Ordering Code:
Order Number Package Number
Package Description
74ABT244CSC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ABT244CSJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ABT244CMSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ABT244CMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ABT244CPC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
Description
OE1, OE2
I0I7
O0O7
Output Enable Input
(Active LOW)
Inputs
Outputs
Truth Table
OE1 I0–3 O0–3 OE2 I4–7 O4–7
HXZHXZ
L HH L HH
LLLLLL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
© 1999 Fairchild Semiconductor Corporation DS010992
www.fairchildsemi.com




74ABT244 pdf, 반도체, 판매, 대치품
Skew
TA = −40°C to +85°C
TA = −40°C to +85°C
VCC = 4.5V5.5V
VCC = 4.5V5.5V
Symbol
Parameter
CL = 50 pF
8 Outputs Switching
CL = 250 pF
8 Outputs Switching
Units
(Note 14)
(Note 15)
Max
Max
tOSHL
(Note 12)
Pin to Pin Skew
HL Transitions
0.8 1.8 ns
tOSLH
(Note 12)
Pin to Pin Skew
LH Transitions
0.8 1.8 ns
tPS
(Note 16)
Duty Cycle
LHHL Skew
1.0 2.5 ns
tOST
(Note 12)
Pin to Pin Skew
LH/HL Transitions
1.0 2.5 ns
tPV
(Note 13)
Device to Device Skew
LH/HL Transitions
1.5 3.0 ns
Note 12: Skew is defined as the absolute value of the difference between the actual propagation delays for any two separate outputs of the same device.
The specification applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or any combination switching LOW-to-HIGH and/or
HIGH-to-LOW (tOST). The specification is guaranteed but not tested.
Note 13: Propagation delay variation for a given set of conditions (i.e., temperature and VCC) from device to device. This specification is guaranteed but not
tested.
Note 14: This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase
(i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.)
Note 15: These specifications guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load
capacitors in the standard AC load.
Note 16: This describes the difference between the delay of the LOW-to-HIGH and the HIGH-to-LOW transition on the same pin. It is measured across all
the outputs (drivers) on the same chip, the worst (largest delta) number is the guaranteed specification. This specification is guaranteed but not tested.
Capacitance
Symbol
Parameter
Typ
CIN Input Capacitance
5.0
COUT (Note 17) Output Capacitance
9.0
Note 17: COUT is measured at frequency f = 1 MHz, per MIL-STD-883, Method 3012.
Units
pF
pF
VCC = 0V
VCC = 5.0V
Conditions
TA = 25°C
www.fairchildsemi.com
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74ABT244 전자부품, 판매, 대치품
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
7 www.fairchildsemi.com

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