TC74VHC240FT 판매점 - OCTAL BUS BUFFER

TC74VHC240FT 반도체 회로 부품 판매점

OCTAL BUS BUFFER

Toshiba

TC74VHC240,244F/FW/FT/FK

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74VHC240F,TC74VHC240FW,TC74VHC240FT,TC74VHC240FK

TC74VHC244F,TC74VHC244FW,TC74VHC244FT,TC74VHC244FK

Octal Bus Buffer

TC74VHC240F/FW/FT/FK

Inverted, 3-State Outputs

TC74VHC244F/FW/FT/FK

Non-Inverted, 3-State Outputs

Note: xxxFW (JEDEC SOP) is not available in

Japan.

TC74VHC240F, TC74VHC244F

The TC74VHC240 and 244 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 74VHC240 is an inverting 3-state buffer having two

active-low output enables. The TC74VHC244 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.

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: tpd = 3.9 ns (typ.) at VCC = 5 V

• Low power dissipation: ICC = 4 µA (max) at 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 to 5.5 V

• Low noise: VOLP = 0.9 V (max)

• Pin and function compatible with 74ALS240/244

TC74VHC240FW, TC74VHC244FW

TC74VHC240FT, TC74VHC244FT

TC74VHC240FK, TC74VHC244FK

Weight

SOP20-P-300-1.27A

: 0.22 g (typ.)

SOP20-P-300-1.27

: 0.22 g (typ.)

SOL20-P-300-1.27

: 0.46 g (typ.)

TSSOP20-P-0044-0.65A : 0.08 g (typ.)

VSSOP20-P-0030-0.50 : 0.03 g (typ.)

1 2006-02-01

Pin Assignment

1G 1

1A1 2

2Y4 3

1A2 4

2Y3 5

1A3 6

2Y2 7

1A4 8

2Y1 9

GND 10

TC74VHC240

(top view)

Iec Logic Symbol

20 VCC

19 2G

18 1Y1

17 2A4

16 1Y2

15 2A3

14 1Y3

13 2A2

12 1Y4

11 2A1

1G (1)

1A1 (2)

1A2 (4)

1A3 (6)

1A4 (8)

TC74VHC240

(18) 1Y1

(16) 1Y2

(14) 1Y3

(12) 1Y4

2G (19) EN

2A1 (11)

2A2 (13)

2A3 (15)

2A4 (17)

Truth Table

Inputs

G An

Outputs

Yn Yn

X: Don’t care

Z: High impedance

Yn: TC74VHC244

Yn : TC74VHC240

(9) 2Y1

(7) 2Y2

(5) 2Y3

(3) 2Y4