TC7MH240,244FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MH240FK,TC7MH244FK
Octal Bus Buffer TC7MH240FK Inverted, 3-State Outputs TC7MH244FK Non-Inverted, 3-State Outputs
The TC7MH240FK and TC7MH244FK are advanced high speed CMOS octal bus buffers fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent bipolar schottky TTL while maintaining the CMOS low power dissipation. The TC7MH240FK is an inverting 3-state buffer having two active-low output enables. The TC7MH244FK is a non-inverting 3-state buffer, and has two active-low output enables. Weight: 0. 03 g (typ. ) These devices are designed to be used with 3-state memory address drivers, etc. An input protection circuit ensures that 0 to 7 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: tpd = 3. 9 ns (typ. ) (VCC = 5 V) Low power dissipation: ICC = 4 µA (max) (Ta = 25°C) High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is provided on all inputs. Balanced propagation delays: tpLH ≈ tpHL Wide operating voltage range: VCC (opr) = 2~5. 5 V Low noise: VOLP = 0. 8 (max) Pin and function compatible with 74ALS240/244
1
2001-10-23
www. DataSheet. in
TC7MH240,244FK
Pin Assignment (top view)
TC7MH240FK
1G
TC7MH244FK 20 19 18 17 16 15 14 13 12 11 VCC
2G 1G
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
20 19 18 17 16 15 14 13 12 11
VCC
2G
1A1
2Y 4
1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1
1Y1
1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
1A2
2Y3
2A4
1Y 2
1A3
2Y 2
2A3
1Y 3
1A4
2 Y1
2A2
1Y 4
GND 10
2A1
GND 10
IEC Logic Symbol
TC7MH240FK 1G 1A1 1A2 1A3 1A4 (1) (2) (4) (6) (8) EN (18) (16) (14) (12)
1Y1 1Y 2 1G
TC7MH244FK (1) (2) (4) (6) (8) EN (18) (16) (14) (12)
1Y 3
1Y 4
1A1 1A2 1A3 1A4
1Y1 1Y2 1Y3 1Y4
...