TC74VHC257F_07 Datasheet, PDF (1/10 Pages) Toshiba Semiconductor – Quad 2-Channel Multiplexer (3-state)

TC74VHC257F/FN/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC257F,TC74VHC257FN,TC74VHC257FT,TC74VHC257FK
Quad 2-Channel Multiplexer (3-state)
The TC74VHC257 is an advanced high speed CMOS
MULTIPLEXER 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.
It 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.
An input protection circuit ensures that 0 to 5.5 V can be
applied to the input pins without regard to the supply voltage.
This device can be used to interface 5 V to 3 V systems and two
supply systems such as battery back up. This circuit prevents
device destruction due to mismatched supply and input voltages.
Features
• High speed: t_pd = 3.6 ns (typ.) at V_CC = 5 V
• Low power dissipation: I_CC = 4 μA (max) at Ta = 25°C
• High noise immunity: V_NIH = V_NIL = 28% V_CC (min)
• Power down protection is provided on all inputs.
• Balanced propagation delays: t_pLH ^∼− t_pHL
• Wide operating voltage range: V_{CC (opr)} = 2 to 5.5 V
• Low noise: V_OLP = 0.8 V (max)
• Pin and function compatible with 74ALS257
Note: xxxFN (JEDEC SOP) is not available in
Japan.
TC74VHC257F
TC74VHC257FN
TC74VHC257FT
TC74VHC257FK
Weight
SOP16-P-300-1.27A
SOL16-P-150-1.27
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.13 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
1
2007-10-01