74VHCT240AFT,74VHCT244AFT
1
CMOS Digital Integrated Circuits Silicon Monolithic
74VHCT240AFT,74VHCT244AFT
74VHCT240AFT,74VHCT244AFT
74VHCT240AFT,74VHCT244AFT
74VHCT240AFT,74VHCT244AFT
Start of commercial production
2013-01
1.
1.
1.
1. Functional Description
Functional Description
Functional Description
Functional Description
• Octal Bus Buffer
74VHCT240AFT: INVERTED, 3-STATE OUTPUTS
74VHCT244AFT: NON-INVERTED, 3-STATE OUTPUTS
2.
2.
2.
2. General
General
General
General
The 74VHCT240AFT and 74VHCT244AFT are advanced high speed CMOS OCTAL BUS BUFFERs fabricated
with silicon gate C
2
MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining the CMOS low power dissipation.
The 74VHCT240AFT is an inverting 3-state buffer having two active-low output enables. The 74VHCT244AFT
is a non-inverting 3-state buffer, and has two active-low output enables.
These devices are designed to be used with 3-state memory address drivers, etc.
The input voltage are compatible with TTL output voltage.
These devices may be used as a level converter for interfacing 3.3 V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins
without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and
input/output voltages such as battery back up, hot board insertion, etc.
Note: Output in off-state
3.
3.
3.
3. Features
Features
Features
Features
(1) AEC-Q100 (Rev. H) (Note 1)
(2) Wide operating temperature range: T
opr
= -40 to 125
(3) High speed: Propagation delay time = 6.1 ns (typ.) at V
CC
= 5.0 V
(4) Quiescent supply current: I
CC
= 4.0 µA (max) at T
a
= 25
(5) Compatible with TTL input: V
IL
= 0.8 V (max)
V
IH
= 2.0 V (min)
(6) Power down protection is provided on all inputs and outputs.
(7) Balanced propagation delays: t
PLH
≈ t
PHL
(8) Low noise: V
OLP
= 1.0 V (max)
(9) Pin and function compatible with the 74 series
(ACT/HCT/AHCT etc.) 240/244 type.
Note 1: This device is compliant with the reliability requirements of AEC-Q100. For details, contact your Toshiba sales
representative.
2017-02-23
Rev.4.0
©2017 Toshiba Corporation
