TC74VHCT138AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHCT138AF,TC74VHCT138AFT,TC74VHCT138AFK
3-to-8 Line Decoder
TC74VHCT138AF
The TC74VHCT138 is an advanced high speed CMOS 3-to-8
LINE DECODER fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power
dissipation.
When the device is enabled, 3 Binary Select inputs (A, B and
C) determine which one of the outputs ( Y0 to Y7 ) will go low.
When enable input G1 is held low or either G2A or G2B is
held high, decoding function is inhibited and all outputs go high.
G1, G2A , and G2B inputs are provided to ease cascade
connection and for use as an address decoder for memory
systems.
The input voltage are compatible with TTL output voltage.
This device 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:
TC74VHCT138AFT
TC74VHCT138AFK
VCC = 0 V
Features
•
High speed: tpd = 7.6 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
Compatible with TTL inputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
Weight
•
Power down protection is provided on all inputs and outputs
•
Balanced propagation delays: tpLH ≈ tpHL
SOP16-P-300-1.27A:
0.18 g (typ.)
•
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 138 type.
TSSOP16-P-0044-0.65A:
0.06 g (typ.)
VSSOP16-P-0030-0.50:
0.02 g (typ.)
1
2012-02-29
