TC74ACT257P Datasheet, PDF (1/8 Pages) Toshiba Semiconductor – CMOS Digital Integrated Circuit Silicon Monolithic 2-Channel Multiplexer (3-state)

TC74ACT257P/F/FN
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74ACT257P,TC74ACT257F,TC74ACT257FN
2-Channel Multiplexer (3-state)
The TC74ACT257 is an advanced high speed CMOS
MULTIPLEXER fabricated with silicon gate and double-layer
metal wiring C²MOS technology.
It achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
This device may be used as a level converter for interfacing
TTL or NMOS to High Speed CMOS. The inputs are compatible
with TTL or NMOS and CMOS output voltage levels.
Each is composed of four independent 2-channel multiplexers
with common SELECT and OUTPUT ENABLE ( OE ).
If OE is set low, the outputs are held in a high-impedance
state. When SELECT is set low, “A” data inputs are enabled.
Conversely, when SELECT is high, “B” data inputs are
enabled.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
• High speed: t_pd = 5.8 ns (typ.) at V_CC = 5 V
• Low power dissipation: I_CC = 8 μA (max) at Ta = 25°C
• Compatible with TTL outputs: V_IL = 0.8 V (max)
V_IH = 2.0 V (min)
• Symmetrical output impedance: |I_OH| = I_OL = 24 mA (min)
Capability of driving 50 Ω
transmission lines.
• Balanced propagation delays: t_pLH ^∼− t_pHL
• Pin and function compatible with 74F257
Pin Assignment
Note: xxxFN (JEDEC SOP) is not available in
Japan.
TC74ACT257P
TC74ACT257F
TC74ACT257FN
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
SOL16-P-150-1.27
: 1.00 g (typ.)
: 0.18 g (typ.)
: 0.13 g (typ.)
1
2007-10-01