SNX4HC245

Octal Bus Transceiver

The SNX4HC245 is a octal bus transceiver from Texas Instruments. View the full SNX4HC245 datasheet below including electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Overview

Part: SN54HC245, SN74HC245

Type: Octal Bus Transceiver

Description: Octal bus transceivers designed for asynchronous two-way communication between data buses, featuring a wide operating voltage range of 2 V to 6 V, high-current 3-state outputs, and low power consumption.

Operating Conditions:

Supply voltage: 2–6 V
Operating temperature: -55 to 125 °C
Input transition rise and fall time: Max 1000 ns (VCC=2V), 500 ns (VCC=4.5V), 400 ns (VCC=6V)

Absolute Maximum Ratings:

Max supply voltage: 7 V
Max continuous output current: ±35 mA
Max junction/storage temperature: 150 °C

Key Specs:

Supply voltage range (VCC): 2 V to 6 V
High-level output voltage (VOH): 3.7 V min (VCC=4.5V, IOH=-6mA, SN74HC245)
Low-level output voltage (VOL): 0.33 V max (VCC=4.5V, IOL=6mA, SN74HC245)
Input current (II): ±1000 nA max (VCC=6V)
Off-state output current (IOZ): ±10 μA max (VCC=6V)
Supply current (ICC): 80 μA max (VCC=6V, IO=0, SN74HC245)
Propagation delay (tpd): 26 ns max (VCC=4.5V, CL=50pF, SN74HC245)
Output enable time (ten): 58 ns max (VCC=4.5V, CL=50pF, SN74HC245)

Features:

Wide Operating Voltage Range of 2 V to 6 V
High-Current 3-State Outputs Drive Bus Lines Directly or Up to 15 LSTTL Loads
Low Power Consumption, 80-μA Max ICC
Typical t pd = 12 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 μA Max

Applications:

Servers
PCs and Notebooks
Network Switches
Wearable Health and Fitness Devices
Telecom Infrastructures
Electronic Points of Sale

Package:

DB (SSOP, 20)
DW (SOIC, 20)
N (PDIP, 20)
NS (SO, 20)
PW (TSSOP, 20)
J (CDIP, 20)
W (CFP, 20)
FK (LCCC, 20)

Features

Wide Operating Voltage Range of 2 V to 6 V
High-Current 3-State Outputs Drive Bus Lines Directly or Up to 15 LSTTL Loads
Low Power Consumption, 80-μA Max ICC
Typical t pd = 12 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 μA Max
On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

Applications

Servers
PCs and Notebooks
Network Switches
Wearable Health and Fitness Devices
Telecom Infrastructures
Electronic Points of Sale

SN54HC245, SN74HC245

SCLS131F - DECEMBER 1982 - REVISED AUGUST 2022

Pin Configuration

Figure 5-1. DB, DGV, DW, N, J, W, or PW Package 20-Pin SSOP, TVSOP, SOIC, PDIP CDIP, CFP, or TSSOP Top View

Figure 5-1. DB, DGV, DW, N, J, W, or PW Package 20-Pin SSOP, TVSOP, SOIC, PDIP CDIP, CFP, or TSSOP Top View

Figure 5-2. FK Package 20-Pin LCCC Top View

PIN	PIN	TYPE (1)	DESCRIPTION
NO.	NAME	TYPE (1)	DESCRIPTION
1	DIR	I/O	Direction Pin
2	A1	I/O	A1 Input/Output
3	A2	I/O	A2 Input/Output
4	A3	I/O	A3 Input/Output
5	A4	I/O	A4 Input/Output
6	A5	I/O	A5 Input/Output
7	A6	I/O	A6 Input/Output
8	A7	I/O	A7 Input/Output
9	A8	I/O	A8 Input/Output
10	GND	-	Ground Pin
11	B8	I/O	B8 Input/Output
12	B7	I/O	B7 Input/Output
13	B6	I/O	B6 Input/Output
14	B5	I/O	B5 Input/Output
15	B4	I/O	B4 Input/Output
16	B3	I/O	B3 Input/Output
17	B2	I/O	B2 Input/Output
18	B1	I/O	B1 Input/Output
19	OE	I/O	Output Enable
20	VCC	-	Power Pin

(1) Signal Types: I = Input, O = Output, I/O = Input or Output

Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER	PARAMETER	PARAMETER	TEST CONDITIONS	TEST CONDITIONS	V CC	T A = 25°C	T A = 25°C	T A = 25°C	SN54HC245	SN54HC245	SN74HC245	SN74HC245	UNIT
					V CC	MIN	TYP	MAX	MIN	MAX	MIN	MAX	UNIT
			V I = V IH or V IL	I OH = -20 μA	2 V	1.9	1.998		1.9		1.9		V
			V I = V IH or V IL		4.5 V	4.4	4.499		4.4		4.4		V
			V I = V IH or V IL		6 V	5.9	5.999		5.9		5.9		V
V OH	High-Level Output	Voltage	V I = V IH or V IL	I OH = -6 mA	4.5 V	3.98	4.3		3.7		3.84		V
			V I = V IH or V IL	I OH = -7.8 mA	6 V	5.48	5.8		5.2		5.34		V
			V I = V IH or V IL	I OL = 20 μA	2 V		0.002	0.1	0.1			0.1	V
			V I = V IH or V IL		4.5 V		0.001	0.1	0.1			0.1	V
			V I = V IH or V IL		6 V		0.001	0.1	0.1			0.1	V
V OL Low-Level Output Voltage	V OL Low-Level Output Voltage	V OL Low-Level Output Voltage	V I = V IH or V IL	I OL = 6 mA	4.5 V		0.17	0.26	0.4		0.33		V
			V I = V IH or V IL	I OL = 7.8 mA	6 V		0.15	0.26	0.4		0.33		V
I I Input Current DIR or OE	I I Input Current DIR or OE	I I Input Current DIR or OE	V I = V CC or 0	V I = V CC or 0	6 V		±0.1	±100	±1000		±1000		nA
I OZ	Off-State (High- Impedance State) Output Current	A or B	V O = V CC or 0	V O = V CC or 0	6 V		±0.01	±0.5	±10		±5		μA
I CC	Supply Current	Supply Current	V I = V CC or 0, I O = 0	V I = V CC or 0, I O = 0	6 V		8		160		80		μA
C	Input Capacitance	DIR or OE	i	i	2 V to 6 V		3	10	10		10		pF

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

			MIN	MAX	UNIT
V CC	Supply voltage		-0.5	7	V
I IK	Input clamp current (2)	V I < 0 or V I > V CC		±20	mA
I OK	Output clamp current (2)	V O < 0 or V O > V CC		±20	mA
I O	Continuous output current	V O = 0 to V CC		±35	mA
	Continuous current through V CC or GND			±70	mA
T stg	Storage temperature		-65	150	°C
T J	Junction Temperature			150	°C

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted) (1)

			SN54HC245	SN54HC245	SN74HC245	SN74HC245	SN74HC245	UNIT
			MIN	MAX	MIN	NOM	MAX	UNIT
V CC	Supply voltage	Supply voltage	2	6	2	5	6	V
V IH		V CC = 2 V	1.5		1.5			V
	High-level input voltage	V CC = 4.5 V V CC = 6 V	3.15 4.2		3.15 4.2			V V
V IL	Low-level input voltage	V CC = 2 V		0.5			0.5	V
		V CC = 4.5 V V CC = 6 V		1.35 1.8		1.35 1.8	0.5	V V
V I	Input voltage	Input voltage	0	V CC	0	V CC		V
V O	Output voltage	Output voltage	0	V CC	0	V CC		V
∆t/∆v	Input transition rise and fall time	V CC = 2 V		1000		1000		ns
∆t/∆v		V CC = 4.5 V		500		500		ns
∆t/∆v		V CC = 6 V		400		400		ns
T A	Operating free-air temperature	Operating free-air temperature	-55	125	-40	85		°C

Thermal Information

		SNx4HC245	SNx4HC245	SNx4HC245	SNx4HC245	SNx4HC245
THERMAL METRIC (1)	THERMAL METRIC (1)	DB (SSOP)	DW (SOIC)	N (PDIP)	NS (SOP)	PW (TSSOP)
		20 PINS	20 PINS	20 PINS	20 PINS	20 PINS
R θJA	Junction-to-ambient thermal resistance	92.1	77.0	57.0	74.1	99.7
R θJC(top)	Junction-to-case (top) thermal resistance	53.9	41.5	48.6	40.6	34.0
R θJB	Junction-to-board thermal resistance	47.2	44.8	38.0	41.6	50.7
ψ JT	Junction-to-top characterization parameter	16.5	16.8	25.4	14.8	1.8
ψ JB	Junction-to-board characterization parameter	46.8	44.3	37.8	41.2	50.1

Typical Application

The SNx4HC245 is a low-drive CMOS device that can be used for a multitude of bus interface type applications where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on the outputs.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
SN54HC245	Texas Instruments	DB (SSOP, 20)
SN74HC245	Texas Instruments	SSOP-20 (DB)

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