SNX4HC245

Part: SN74HC245 (SNx4HC245 family, also SN54HC245) — Texas Instruments

Type: Octal Bus Transceiver with 3-State Outputs

Description: 2–6 V octal bus transceiver with 3-state outputs, ±6 mA output drive at 5 V, typical tpd of 12 ns, and 80 μA max ICC (SN74HC245).

Operating Conditions:

• Supply voltage: 2–6 V (5 V nominal for SN74HC245)
• Operating temperature: -40 to 85 °C (SN74HC245); -55 to 125 °C (SN54HC245)
• Input transition time: max 1000 ns at VCC = 2 V, 500 ns at 4.5 V, 400 ns at 6 V

Absolute Maximum Ratings:

• Max supply voltage: 7 V (min -0.5 V)
• Continuous output current: ±35 mA
• Continuous current through VCC or GND: ±70 mA
• Input/output clamp current: ±20 mA
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• VOH (SN74HC245): min 3.84 V at VCC = 4.5 V, IOH = -6 mA; min 5.34 V at 6 V, IOH = -7.8 mA
• VOL (SN74HC245): max 0.33 V at VCC = 4.5 V, IOL = 6 mA; max 0.33 V at 6 V, IOL = 7.8 mA
• ICC (SN74HC245): max 80 μA at VCC = 6 V, VI = VCC or 0 (typ 8 μA at 25 °C)
• Input current (DIR/OE): max ±1000 nA over temperature (SN74HC245), VCC = 6 V
• IOZ (A or B): max ±5 μA over temperature (SN74HC245), VCC = 6 V
• tpd (A to B or B to A, CL = 50 pF, SN74HC245): max 26 ns at 4.5 V, 22 ns at 6 V, 130 ns at 2 V
• ten (OE to A or B, CL = 50 pF, SN74HC245): max 58 ns at 4.5 V
• Input capacitance: typ 3 pF, max 10 pF; Cpd 40 pF per transceiver (no load)

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
• Low input current of 1 μA max
• Direction-control (DIR) input sets A-to-B or B-to-A transmission
• Output-enable (OE) input isolates the buses
• ESD: ±3000 V HBM, ±1000 V CDM

Applications:

• Servers
• PCs and notebooks
• Network switches
• Wearable health and fitness devices
• Telecom infrastructure
• Electronic points of sale

Package:

• DB (SSOP, 20) — 7.20 mm × 5.30 mm
• DW (SOIC, 20) — 12.80 mm × 7.50 mm
• N (PDIP, 20) — 24.33 mm × 6.35 mm
• NS (SO, 20) — 12.60 mm × 5.30 mm
• PW (TSSOP, 20) — 6.50 mm × 4.40 mm

• 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.

• 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

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

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

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

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

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

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.