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Part: 7LVC245APWDH
Category:
Logic
-> Bus Transceivers
Description: Octal Bus Transceiver With Direction Pin With 5-volt Tolerant Inputs/outputs 3-state
Company: Philips Semiconductors
Datasheet: Download 7LVC245APWDH datasheet File size : 0 kB
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INTEGRATED CIRCUITS
74LVC245A/74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State)
Product specification Supersedes data of 1997 Dec 19 IC24 Data Handbook 1998 May 20
Philips Semiconductors
Philips Semiconductors
Product specification
Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State)
74LVC245A 74LVCH245A
FEATURES
· 5-volt tolerant inputs/outputs, for interfacing with 5-volt logic · Supply voltage range of 2.7V to 3.6V · Complies with JEDEC standard no. 8-1A · CMOS low power consumption · Direct interface with TTL levels · High impedance when VCC = 0V · Bushold on all data inputs (74LVCH245A only)
DESCRIPTION
The 74LVC245A/74LVCH245A is a high-performance, low-power, low-voltage, Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3V or 5V devices. In 3-State operation, outputs can handle 5V. These features allow the use of these devices as translators in a mixed 3.3V/5V environment. The 74LVC245A/74LVCH245A is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both send and receive directions. The '245' features an output enable (OE) input for easy cascading and a send/receive (DIR) input for direction control. OE controls the outputs so that the buses are effectively isolated. The '245' is functionally identical to the '640', but the '640' has true (non-inverting) outputs.
QUICK REFERENCE DATA
SYMBOL tPHL/tPLH CI CI/O CP D PARAMETER Propagation delay An to Bn; Bn to An Input capacitance Input/output capacitance Power dissipation capacitance per buffer Notes 1 and 2 CONDITIONS CL = 50pF VCC = 3.3V TYPICAL 3.6 5.0 10.0 33 UNIT ns pF pF pF
NOTE: 1. CPD is used to determine the dynamic power dissipation (PD in mW): PD = CPD x VCC2 x fi + S (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacity in pF; fo = output frequency in MHz; VCC = supply voltage in V; S (CL x VCC2 x fo) = sum of outputs. 2. The condition is VI = GND to VCC
ORDERING INFORMATION
PACKAGES 20-Pin Plastic Shrink Small Outline (SO) 20-Pin Plastic Shrink Small Outline (SSOP) Type II 20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I 20-Pin Plastic Shrink Small Outline (SO) 20-Pin Plastic Shrink Small Outline (SSOP) Type II 20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I TEMPERATURE RANGE 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C OUTSIDE NORTH AMERICA 74LVC245A D 74LVC245A DB 74LVC245A PW 74LVCH245A D 74LVCH245A DB 74LVCH245A PW NORTH AMERICA 74LVC245A D 74LVC245A DB 7LVC245APW DH 74LVCH245A D 74LVCH245A DB LVCH245APW DH PKG. DWG. # SOT163-1 SOT339-1 SOT360-1 SOT163-1 SOT339-1 SOT360-1
1998 May 20
2
853-2044 19419
Philips Semiconductors
Product specification
Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State)
74LVC245A 74LVCH245A
PIN CONFIGURATION
DIR A0 A1 A2 A3 A4 A5 A6 A7 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 V CC OE
LOGIC SYMBOL
1 DIR 19 2 18 A1 3 17 A2 4 16 A3 B5 B6 B7 A5 7 13 A6 8 12 B6 B5 A4 6 14 B4 5 15 B3 B2 B1 B0 OE
A0 B0 B1 B2 B3 B4
GND 10
SV00014
PIN DESCRIPTION
PIN NUMBER 1 2, 3, 4, 5, 6, 7, 8, 9 10 18, 17, 16, 15, 14, 13, 12, 11 19 20 SYMBOL DIR A0 to A7 GND B0 to B7 OE VCC FUNCTION Direction control Data inputs/outputs Ground (0V)
19
A7
9 11 B7 SV00016
LOGIC SYMBOL (IEEE/IEC)
G3 3EN1 (BA) 1 3EN2 (AB)
Data inputs/outputs Output enable input (active-Low) Positive supply voltage
2 3
1 2 18 17 16 15 14 13 12 11
FUNCTION TABLE
INPUTS OE L L H H L X Z DIR L H X
An
INPUTS/OUTPUTS B0 Inputs B=A Z
4 5 6 7 8 9
A=B lnputs Z
= HIGH voltage level = LOW voltage level = Don't care = High impedance OFF-state
SV00208
1998 May 20
3
Philips Semiconductors
Product specification
Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State)
74LVC245A 74LVCH245A
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL PARAMETER DC supply voltage (for max. speed performance) VCC VI VO Tamb tr, tf DC supply voltage (for low-voltage applications) DC Input voltage range DC Output voltage range; output HIGH or LOW state DC output voltage range; output 3-State Operating ambient temperature range in free-air Input rise and fall times VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V CONDITIONS MIN 2.7 1.2 0 0 0 40 0 0 MAX 3.6 V 3.6 5.5 VCC 5.5 +85 20 10 °C ns/V V V UNIT
ABSOLUTE MAXIMUM RATINGS1
In accordance with the Absolute Maximum Rating System (IEC 134) Voltages are referenced to GND (ground = 0V) SYMBOL VCC IIK VI IOK VO IO IGND, ICC Tstg PTOT PARAMETER DC supply voltage DC input diode current DC input voltage DC output diode current DC output voltage; output HIGH or LOW state DC output voltage; output 3-State DC output source or sink current DC VCC or GND current Storage temperature range Power dissipation per package plastic mini-pack (SO) plastic shrink mini-pack (SSOP and TSSOP) above +70°C derate linearly with 8 mW/K above +60°C derate linearly with 5.5 mW/K VI t0 Note 2 VO uVCC or VO t 0 Note 2 Note 2 VO = 0 to VCC CONDITIONS RATING 0.5 to +6.5 50 0.5 to +6.5 "50 0.5 to VCC +0.5 0.5 to 6.5 "50 "100 65 to +150 500 500 UNIT V mA V mA V mA mA °C
mW
NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 May 20
4
Philips Semiconductors
Product specification
Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State)
74LVC245A 74LVCH245A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0V) LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40°C to +85°C MIN VIH HIGH level Input voltage level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V LOW level Input voltage level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOH HIGH level output voltage level output voltage VCC = 3.0V; VI = VIH or VIL; IO = 100µA VCC = 3.0V; VI = VIH or VIL; IO = 18mA VCC = 3.0V; VI = VIH or VIL; IO = 24mA VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOL LOW level output voltage VCC = 3.0V; VI = VIH or VIL; IO = 100µA VCC = 3.0V; VI = VIH or VIL; IO = 24mA II IOZ Ioff ICC ICC IBHL IBHH IBHLO IBHHO Input leakage current6 current6, 7 VCC = 3.6V; VI = 5.5V or GND VCC = 3.6V; VI = VIH or VIL; VO = 5.5V or GND VCC = 0.0V; VI or VO = 5.5V VCC = 3.6V; VI = VCC or GND; IO = 0 VCC = 2.7V to 3.6V; VI = VCC 0.6V; IO = 0 VCC = 3.0V; VI =0.8V VCC = 3.0V; VI =2.0V VCC = 3.6V VCC = 3.6V 75 75 500 500 "0.1 0.1 0.1 0.1 5 VCC*0.5 VCC*0.2 VCC*0.6 VCC*0.8 0.40 0.20 0.55 "5 "5 "10 10 500 µA µA µA µA µA µA µA µA µA V VCC V VCC 2.0 GND V 0.8 TYP1 MAX V UNIT
VIL
3-State output OFF-state Power off leakage supply Quiescent supply current
Additional quiescent supply current per input pin Bushold LOW sustaining current2, 3, 4 Bushold HIGH sustaining current2, 3, 4 Bushold LOW overdrive current2, 3, 5 Bushold HIGH overdrive current2, 3, 5
NOTES: 1. All typical values are at VCC = 3.3V and Tamb = 25°C. 2. Valid for data inputs of bushold parts (LVCH-A) only. 3. For data inputs only, control inputs do not have a bushold circuit. 4. The specified sustaining current at the data input holds the input below the specified VI level. 5. The specified overdrive current at the data input forces the data input to the opposite logic input state. 6. For bushold parts, the bushold circuit is switched off when VI exceeds VCC allowing 5.5V on the input terminal. 7. For I/O ports the parameter IOZ includes the input leakage current.
1998 May 20
5
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7L-1
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