Document
TC7MBD3244AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MBD3244AFK
Octal Bus Switch
The TC7MBD3244AFK provides eight bits of high-speed TTL-compatible bus switching in a standard ’244 device pinout. The low on resistance of the switch allows connections to be made with minimal propagation delay.
The device is organized as two 4-bit low-impedance switches with separate output-enable (OE) inputs. When OE is low, the switch is on and data can flow from port A to port B, or vice versa. When OE is high, the switch is open and a high-impedance state exists between the two ports.
The device is enable to realize the shift of signal level from 5 V to 3.3 V.
All inputs are equipped with protection circuits against static discharge.
Weight: 0.03 g (typ.)
Features
• Operating voltage: VCC = 4.5 to 5.5 V • High speed: tpd = 0.32 ns (max.) • Low on resistance: RON = 5 Ω (typ.) • ESD performance: Machine model ≥ ±200 V
Human body model ≥ ±2000 V • Compatible with TTL outputs (control inputs) • Low Power Dissipation: ICC = 10 μA (max.) • Package: VSSOP (US20) • Pin compatible with the 74xx244 type.
Functionally equivalent to (FST/CBT) 3244.
Pin Assignment (top view)
1OE 1 1A1 2 2B4 3 1A2 4 2B3 5 1A3 6 2B2 7 1A4 8 2B1 9 GND 10
(top view)
20 VCC 19 2OE 18 1B1 17 2A4 16 1B2 15 2A3 14 1B3 13 2A2 12 1B4 11 2A1
Start of commercial production
2002-06
1
2014-03-01
Truth Table
Inputs OE L H
Function
A port = B port Disconnect
System Diagram
1A1
1B1
2A1
TC7MBD3244AFK
2B1
1A4
1B4
2A4
2B4
1OE
2OE
Absolute Maximum Ratings (Note)
Characteristics
Symbol
Rating
Unit
Power supply range DC input voltage DC switch voltage Input diode current Continuous channel circuit Power dissipation DC VCC/ground current Storage temperature
VCC
−0.5 to 7.0
V
VIN
−0.5 to 7.0
V
VS
−0.5 to 7.0
V
IIK
−50
mA
IS
128
mA
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc).
Operating Ranges (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage Input voltage Switch voltage Operating temperature Input rise and fall time
VCC VIN VS Topr dt/dv
4.5 to 5.5 0 to 5.5 0 to 5.5 −40 to 85 0 to 10
V V V °C ns/V
Note: The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND.
2
2014-03-01
TC7MBD3244AFK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristics
“H” level Input voltage
“L” level
Symbol VIH VIL
Test Condition ⎯ ⎯
High-level output voltage
IOH=-1μA
VOH
(Note 2)
VIS = VCC
Input leakage current
Power off leakage current
Off-STATE leakage current (switch off)
IIN IOFF
VIN = 0 to 5.5 V A, B, OE = 0 to 5.5 V
ISZ A, B = 0~5.5 V, OE = VCC
ON resistance
(Note 3)
RON
VIS = 0 V
IIS = 64 mA IIS = 30 mA
Quiescent supply current Increase in ICC per input
VIS = 2.3 V, IIS = 15 mA
ICC ΔICC
VIN = VCC or GND, IOUT = 0 VIN = 3.4 V (one input)
VCC (V)
Min
Typ. (Note 1)
Max
Unit
4.5 to 5.5 2.0
⎯
⎯
V
4.5 to 5.5 ⎯
⎯
0.8
4.75
2.3
2.8
3.2
5.0
2.5
3.0
3.4
V
5.25
2.7
3.2
3.6
4.5 to 5.5 ⎯
⎯
±1.0 μA
0
⎯
⎯
±1.0 μA
4.5 to 5.5 ⎯
⎯
±1.0 μA
4.5
⎯
5
9
4.75
⎯
5
8
4.5
⎯
5
9
Ω
4.75
⎯
5
8
4.5
⎯
35
65
4.75
⎯
35
50
5.5
⎯
⎯
10 μA
5.5
⎯
⎯
2.5 mA
Note 1: Typical values are at VCC = 5 V, Ta = 25°C.
Note 2: It recommends that this device uses Pull-up resistance when adding and using resistance for an output terminal. Since it couses to drop a VOH voltage level when using Pull-down resistance for an output terminal.
Note 3: Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A or B) pins.
AC Characteristics (Ta = −40~85°C)
Characteristics Propagation delay time (bus to bus)
Output enable time
Output disable time
Symbol
Test Condition
tpLH tpHL tpZL tpZH tpLZ tpHZ
Figure 1, Figure 2 Figure 1, Figure 3 Figure 1, Figure 3
Min Max Unit VCC (V)
(Note) 4.5
⎯ 0.32 ns
4.5
⎯
7.0
ns
4.5
⎯
7.0
ns
Note: The propagation delay time is calculated by the RC (on-resistance an.