Document
www.DataSheet4U.com
TC74AC257,258P/F/FN
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74AC257P,TC74AC257F,TC74AC257FN TC74AC258P,TC74AC258F,TC74AC258FN
TC74AC257P/F/FN 2-Channel Multiplexer (3-state) TC74AC258P/F/FN 2-Channel Multiplexer (3-state, inverting)
The TC74AC257 and TC74AC258 are advanced high speed CMOS MULTIPLEXERs fabricated with silicon gate and double-layer metal wiring C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. Each is composed of four independent 2-channel multiplexers with common SELECT and OUTPUT ENABLE ( OE ). The TC74AC257 is a non-inverting multiplexer, while the TC74AC258 is an inverting. 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.
Note: xxxFN (JEDEC SOP) is not available in Japan. TC74AC257P, TC74AC258P
TC74AC257F, TC74AC258F
DataShee
Features
• • • •
High speed: tpd = 3.6 ns (typ.) at VCC = 5 V
DataSheet4U.com
Low power dissipation: ICC = 8 µA (max) at Ta = 25°C High noise immunity: VNIH = VNIL = 28% VCC (min) Symmetrical output impedance: |IOH| = IOL = 24 mA (min) Capability of driving 50 Ω transmission lines.
• • •
Balanced propagation delays: tpLH ∼ − tpHL Wide operating voltage range: VCC (opr) = 2~5.5 V Pin and function compatible with 74F257/258
TC74AC257FN, TC74AC258FN
Weight DIP16-P-300-2.54A SOP16-P-300-1.27A SOP16-P-300-1.27 SOL16-P-150-1.27
: 1.00 g (typ.) : 0.18 g (typ.) : 0.18 g (typ.) : 0.13 g (typ.)
DataSheet4U.com
1
DataSheet 4 U .com
2006-02-01
www.DataSheet4U.com
TC74AC257,258P/F/FN
Pin Assignment
TC74AC257 TC74AC258
IEC Logic Symbol
TC74AC257 TC74AC258
et4U.com
DataShee
DataSheet4U.com
Truth Table
Inputs
OE
H L L L L
Outputs
A
X L H X X
SELECT
X L L H H
B
X X X L H
Y (257)
Z L H L H
Y (258) Z H L H L
X: Don’t care Z: High impedance
DataSheet4U.com
2
DataSheet 4 U .com
2006-02-01
www.DataSheet4U.com
TC74AC257,258P/F/FN
System Diagram
TC74AC257 TC74AC258
et4U.com
Absolute Maximum Ratings (Note 1)
Characteristics Supply voltage range DC input voltage DC output voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT ICC PD Tstg
DataShee
Unit V V V mA mA mA mA mW °C
DataSheet4U.com Rating
−0.5~7.0 −0.5~VCC + 0.5 −0.5~VCC + 0.5 ±20 ±50 ±50 ±100
500 (DIP) (Note 2)/180 (SOP)
−65~150
Note1: Note2:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. 500 mW in the range of Ta = −40~65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C should be applied up to 300 mW.
DataSheet4U.com
3
DataSheet 4 U .com
2006-02-01
www.DataSheet4U.com
TC74AC257,258P/F/FN
Recommended Operating Conditions (Note)
Characteristics Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time Symbol VCC VIN VOUT Topr dt/dV Rating 2.0~5.5 0~VCC 0~VCC Unit V V V °C ns/V
−40~85
0~100 (VCC = 3.3 ± 0.3 V) 0~20 (VCC = 5 ± 0.5 V)
Note:
The recommended operating conditions are required to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND.
Electrical Characteristics
DC Characteristics
Ta = 25°C Characteristics Symbol Test Condition VCC (V) 2.0 High-level input voltage VIH Min 1.50 2.10 3.85 Typ. Max Ta = −40~85°C Unit Min 1.50 2.10 3.85 Max
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
2.0 3.0 4.5
⎯ ⎯ ⎯
0.50 0.90 1.65
⎯ ⎯ ⎯
0.50 0.90 1.65 V V
⎯
3.0 5.5 2.0
⎯ ⎯ ⎯
1.9 2.9 4.4 2.58 3.94
⎯ ⎯ ⎯
1.9 2.9 4.4 2.48 3.80 3.85
et4U.com
Low-level input voltage
VIL
⎯
3.0 5.5
DataShee
DataSheet4U.com 2.0
IOH = −50 µA High-level output voltage VOH VIN = VIH or IOH = −4 mA VIL IOH = −24 mA IOH = −75 mA IOL = 50 µA Low-level output voltage VOL VIN = VIH or IOL = 12 mA VIL IOL = 24 mA IOL = 75 mA 3-state output off-state current Input leakage current Quiescent supply current IOZ IIN ICC VIN = VIH or VIL VOUT = VCC or GND VIN = VCC or GND VIN = VCC or GND (Note) (Note) 3.0 4.5 3.0 4.5 5.5 2.0 3.0 4.5 3.0 4.5 5.5 5.5
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
0.1 0.1 0.1 0.36 0.36
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
0.1 0.1 0.1 V 0.44 0.44 1.65 V
⎯ ⎯ ⎯
0.0 0.0 0.0
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
⎯ ±0.5 ±0.1
8.0
±5.0 ±1.0
80.0
µA µA µA
5.5 5.5
Note:
This spec indicates the capability of driving 50 Ω transmission lines. One output should be tested at a time for a 10 ms maximum duration.
DataSheet4U.com
4
DataSheet 4 U .com
2006-02-01
www.DataSheet4U.com
TC74AC257,258P/F/FN
AC Characteristics (CL = 50 pF, RL = 500 Ω, input: tr = tf = 3 ns)
Characteristics Propagation delay time (A, B-Y, Y ) Propagation delay time (SELECT-Y, Y ) Output enable time Symbol Test Condition VCC (V) tpLH tpHL tpLH tpHL tpZL tpHZ Output disable tim.