Document
HD74HCT241
Octal Buffers/Line Drivers/Line Receivers (with noninverted 3-state outputs)
Description
The HD74HCT241 is a noninverting buffer and has one active low enable and one active high enable. Each enable independently controls 4 buffers. This device does not have schmitt trigger inputs.
Features
• • • • • • LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (A to Y) = 10 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Inputs 1G H L L H L X Z : : : : 2G L H H High level Low level Irrelevant Off (high impedance) state of a 3-state output A X H L Output Y Z H L
HD74HCT241
Pin Arrangement
1G 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1
1 2 3 4 5 6 7 8 9
20 VCC 19 2G 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 (Top view)
GND 10
2
HD74HCT241
Block Diagram
To three other 1A Buffers To three other 2A Buffers
VCC Input 1A Two of 8 Buffers YA
VCC Input 2A
YB
1G
2G
Absolute Maximum Ratings
Item Supply voltage range Input voltage Output voltage DC current drain per pin DC current drain per VCC, GND DC input diode current DC output diode current Power dissipation per package Storage temperature Symbol VCC VIN VOUT I OUT I CC, I GND I IK I OK PT Tstg Rating –0.5 to +7.0 –0.5 to VCC + 0.5 –0.5 to VCC + 0.5 ±35 ±75 ±20 ±20 500 –65 to +150 Unit V V V mA mA mA mA mW °C
3
HD74HCT241
DC Characteristics
Ta = 25°C Item Input voltage Symbol VIH VIL Output voltage VOH Ta = –40 to +85°C Max — 0.8 — — 0.1 0.33 ±5.0 ±1.0 40 µA µA µA V Unit V V V Test Conditions VCC (V) 4.5 to 5.5 4.5 to 5.5 4.5 4.5 4.5 4.5 5.5 5.5 5.5 Vin = VIH or VIL I OH = –20 µA I OH = –6 mA Vin = VIH or VIL I OL = 20 µA I OL = 6 mA Vin = VIH or VIL, Vout = VCC or GND Vin = VCC or GND Vin = VCC or GND, Iout = 0 µA
Min Typ Max Min 2.0 — 4.4 — — — — 2.0
0.8 — — — 4.4 4.13
4.18 — VOL — — Off-state output current Input current I OZ Iin — — — — — — — —
0.1 — 0.26 — ±0.5 — ±0.1 — 4.0 —
Quiescent current I CC
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C Item Symbol Ta = –40 to +85°C Max 25 25 38 38 38 38 15 10 ns pF ns ns Unit ns Test Conditions VCC (V) 4.5 4.5 4.5 4.5 4.5 4.5 4.5 —
Min Typ Max Min — — — — — — — — 11 9 14 12 13 17 4 5 20 20 30 30 30 30 12 10 — — — — — — — —
Propagation delay t PHL time Output enable time Output disable time Output rise/fall time Input capacitance t PLH t ZL t ZH t LZ t HZ t TLH t THL Cin
4
Unit: mm
24.50 25.40 Max 20 11 7.00 Max 6.30 1 0.89
1.27 Max
10 1.30 2.54 Min 5.08 Max 7.62
0.51 Min
2.54 ± 0.25
0.48 ± 0.10
0.25 – 0.05 0° – 15°
+ 0.11
Hitachi Code JEDEC EIAJ Weight (reference value)
DP-20N — Conforms 1.26 g
Unit: mm
12.6 13 Max
20
11
1
10
5.5
0.80 Max
2.20 Max
*0.22 ± 0.05 0.20 ± 0.04
0.20 7.80 + – 0.30
1.15
1.27 *0.42 ± 0.08 0.40 ± 0.06
0.10 ± 0.10
0° – 8°
0.70 ± 0.20
0.15
0.12 M.