IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER WITH 3-STATE OUTPUTS AND 5 VOLT TOLERANT I/O DESCRIPTION: FEATURES: – – – – – – – – IDT74LVC4245A 0.5 MICRON CMOS Technology VCCA = 5V ±0.5V VCCB = 2.7V to 3.6V CMOS power levels (0.4µ W typ. static) Rail-to-Rail output swing for increased noise margin All inputs, outputs and I/O are 5 Volt tolerant Supports hot insertion Available in SOIC, SSOP, QSOP, and TSSOP packages The LVC4245A is manufactured using advanced dual metal CMOS technology. This octal noninverting bus transceiver contains two separate supply rails; B port has VCCB, which is set at 3.3V, and A port has V CCA, which is set at 5V. This allows for translation from a 3.3V to a 5V environment, and vice-versa. This device is ideal for asynchronous communication between two buses (A and B). The direction control pin (DIR) controls the direction of data flow. The output enable pin (OE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. Drive Features for LVC4245A: – High Output Drivers: ±24mA – Reduced system switching noise The LVC4245A has been designed with a ±24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance. APPLICATIONS: • 5V and 3.3V mixed voltage systems • Data communication and telecommunication systems FUNCTIONAL BLOCK DIAGRAM 2 22 A1 21 A2 B6 9 5V Port 15 A8 B5 8 16 A7 B4 7 17 A6 B3 6 18 A5 B2 5 19 A4 B1 4 20 A3 OE 3 3.3V Port DIR B7 10 14 INDUSTRIAL TEMPERATURE RANGE B8 JULY 2000 1 c 1999 Integrated Device Technology, Inc. DSC-4754/- IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS FOR VCCA (1) (5V) V CCA 1 24 V CCB (3.3V) Symbol VTERM Description Terminal Voltage with Respect to GND Max. – 0.5 to +6.5 Unit V DIR 2 23 V CCB (3.3V) TSTG Storage Temperature – 65 to +150 °C A1 3 22 OE IOUT DC Output Current – 50 to +50 mA IIK IOK ICC ISS Continuous Clamp Current, VI < 0 or VO < 0 Continuous Current through each VCC or GND – 50 mA ±100 mA A2 4 A3 5 SO24-2 SO24-7 SO24-8 SO24-9 21 B1 20 B2 19 B3 18 B4 A4 6 A5 7 A6 8 17 B5 A7 9 16 B6 A8 10 15 B7 GND 11 14 B8 GND 12 13 GND ABSOLUTE MAXIMUM RATINGS FOR VCCB (1) SOIC/ SSOP/ QSOP/ TSSOP TOP VIEW Description Output Enable Input (Active LOW) DIR Direction Control Input Ax Port A Inputs or 3-State Outputs Bx Port B Inputs or 3-State Outputs Description Terminal Voltage with Respect to GND Max. – 0.5 to +6.5 Unit V TSTG Storage Temperature – 65 to +150 °C IOUT DC Output Current – 50 to +50 mA IIK IOK ICC ISS Continuous Clamp Current, VI < 0 or VO < 0 Continuous Current through each VCC or GND – 50 mA ±100 mA NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. PIN DESCRIPTION Pin Names OE Symbol VTERM CAPACITANCE (TA = +25°C, f = 1.0MHZ) FUNCTION TABLE (1) Symbol CIN Parameter(1) Input Capacitance CI/O I/O Port Capacitance(2) I/O Port Capacitance(3) Inputs OE DIR L L Outputs Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State CI/O Conditions VIN = 0 or VCCA VCCA = Open VOUT = VCCA or GND, VCCA = 5V VOUT = VCCB or GND, VCCB = 3.3V NOTES: 1. As applicable to the device type. 2. For A port only. 3. For B port only. NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care 2 Typ. 5 Max. Unit — pF 11 — pF 11 — pF IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT) Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = – 40°C To +85°C; VCCA = 5V±0.5V (1) Min. 2 Typ.(2) — Max. — Unit V — — 0.8 V VI = 0 to 5.5V — — ±1 µA VO = 0 to 5.5V — — ±5 µA — 100 — mV — — 80 µA — — 1.5 mA Symbol VIH Parameter Input HIGH Voltage Level Test Conditions = 4.5V to 5.5V VCCA VIL Input LOW Voltage Level VCCA = 4.5V to 5.5V IIH IIL IOZH Input Leakage Current (control inputs) VCCA = 5.5V High Impedance Output Current VCCA = 5.5V IOZL (3-State Output pins) VH Input Hysteresis VCCA = 5.0V ICCL ICCH ICCZ Quiescent Power Supply Current VCCA = 5.5V ∆ICC Quiescent Power Supply Current Variation One input at 3.4V, other inputs at VCCA or GND VCCA = 4.5V to 5.5V VIN = GND or VCCA NOTES: 1. VCCB = 2.7V to 3.6V 2. Typical values are at VCCA = 5.0V, +25°C ambient. DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (B PORT) Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = – 40°C To +85°C; VCCB = 2.7V To 3.6V (1) Symbol VIH Parameter Input HIGH Voltage Level Test Conditions = 2.7V to 3.6V VCCB VIL Input LOW Voltage Level VCCB = 2.7V to 3.6V IOZH High Impedance Output Current VCCB = 3.6V IOZL (3-State Output pins) VH Input Hysteresis VCCB = 3.3V ICCL ICCH ICCZ ∆ICC Quiescent Power Supply Current VCCB = 3.6V Quiescent Power Supply Current Variation One input at VCCB – 0.6V, other inputs at VCCB or GND VCCB = 2.7V to 3.6V VO = 0 to VCCB VIN = GND or VCCB NOTES: 1. VCCA = 5V ± 0.5V 2. Typical values are at VCCB = 3.3V, +25°C ambient. 3 Min. 2 Typ.(2) — Max. — Unit V — — 0.8 V — — ±5 µA — 100 — mV — — 50 µA — — 500 µA IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE OUTPUT DRIVE CHARACTERISTICS, VCCA = 5V±0.5V (A PORT) Symbol VOH Parameter Output HIGH Voltage VCCA = 4.5V (B port to A port) VCCA = 5.5V Test Conditions(1) IOH = – 0.1mA VCCA = 4.5V IOH = – 24mA VCCA = 5.5V VOL Output LOW Voltage (B port to A port) VCCA = 4.5V IOL = 0.1mA VCCA = 5.5V Min. 4.3 Max. — 5.3 — 3.7 — 4.7 — — 0.2 — VCCA = 4.5V IOL = 24mA Unit V V 0.2 0.55 VCCA = 5.5V — 0.55 NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. T A = –40°C to +85°C, VCCB = 2.7V to 3.6V. OUTPUT DRIVE CHARACTERISTICS, VCCB = 2.7V TO 3.6V (B PORT) Symbol VOH Test Conditions(1) = 2.7V to 3.6V IOH = – 0.1mA Parameter Output HIGH Voltage VCCB (A port to B port) VCCB = 2.7V Min. VCC – 0.2 IOH = – 12mA VCCB = 3.0V VOL Output LOW Voltage (A port to B port) Max. — 2.2 — 2.4 — VCCB = 3.0V IOH = – 24mA 2 — VCCB = 2.7V to 3.6V IOL = 0.1mA — 0.2 VCCB = 2.7V IOL = 12mA — 0.4 VCCB = 3.0V IOL = 24mA — 0.55 Unit V V NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. T A = –40°C to +85°C, VCCA = 5V ± 0.5V. OPERATING CHARACTERISTICS, TA = 25°C VCCA = 5V, VCCB = 3.3V Symbol Parameter CPD Power dissipation capacitance per transceiver Outputs enabled CPD Test Conditions CL = 0pF, f = 10Mhz Power dissipation capacitance per transceiver Outputs disabled 4 Typical 39.5 Unit 5 pF pF IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER SWITCHING CHARACTERISTICS INDUSTRIAL TEMPERATURE RANGE (1) VCCA = 5V±0.5V, VCCB = 2.7V to 3.6V Symbol tPHL tPLH tPHL tPLH tPZL tPZH tPZL tPZH tPLZ tPHZ tPLZ tPHZ Parameter Min. 1 1 1 1 1 1 1 1 1 1 1 1 Propagation Delay Ax to Bx Propagation Delay Bx to Ax Output Enable Time OE to Bx Output Enable Time OE to Ax Output Disable Time OE to Bx Output Disable Time OE to Ax NOTE: 1. See test circuits and waveforms. TA = – 40°C to + 85°C. 5 Max. 6.3 6.7 6.1 5 8.8 9.8 9 8.1 7.7 7.8 7 5.8 Unit ns ns ns ns ns ns IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE LOAD CIRCUIT AND VOLTAGE WAVEFORMS PARAMETER MEASUREMENT INFORMATION (A PORT) TEST CONDITIONS LOAD CIRCUIT 500 Ω S1 From Output Under Test 2 x V CC TEST Open tPLH / tPHL Open tPLZ / tPZL 2 x VCC tPHZ / tPZH GND GND C L = 50pF (see Note A) S1 500 Ω VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING tW Input 1.5V 3V Output Control V CC 1.5V 1.5V 1.5V 0V 0V tPZL Output W aveform 1 S1 at 2 X V CC (see Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTS tPLZ V CC 50% V CC tPZH Output W aveform 2 S1 at G ND (see Note B) tPHZ 50% V CC V CC 1.5V Input 1.5V 0V tPHL tPLH V OH Output 50% V CC 50% V CC V OL NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with intetnal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with intetnal conditions such that the output is HIGH except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz; Zo = 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns. D. The outputs are measured one at a time with one transition per measurement. 6 V OL+ 0.3V V OL V OH V OH-0.3V 0V IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE LOAD CIRCUIT AND VOLTAGE WAVEFORMS PARAMETER MEASUREMENT INFORMATION (B PORT) TEST CONDITIONS LOAD CIRCUIT 7V 500 Ω S1 From Output Under Test Open GND C L = 50pF (see Note A) 500 Ω VOLTAGE WAVEFORMS PULSE DURATION TEST S1 tPLH / tPHL Open tPLZ / tPZL 7V tPHZ / tPZH GND VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING tW Input 1.5V 3V Output Control 3V 1.5V 1.5V 1.5V 0V 0V tPZL tPLZ Output W aveform 1 S1 at 7V (see Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTS 3.5V 1.5V tPHZ tPZH Output W aveform 2 S1 at G ND (see Note B) 1.5V 3V 1.5V 1.5V Input 0V tPHL tPLH V OH Output 1.5V 1.5V V OL NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with intetnal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with intetnal conditions such that the output is HIGH except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz; Zo = 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns. D. The outputs are measured one at a time with one transition per measurement. 7 V OL+ 0.3V V OL V OH V OH-0.3V 0V IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Temp. Range LVC X Bus-Hold XX XXXX Device Type Package SO PY Q PG Small Outline IC (gull wing) (SO24-2) Shrink Small Outline Package (SO24-7) Quarter Size Small Outline Package (SO24-8) Thin Shrink Small Outline Package (SO24-9) 4245A Octal Bus Transceiver and 3.3V to 5V Shifter with 3-State Outputs, ±24mA Blank No Bus-hold 74 –40°C to +85°C CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 8