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74HC/HCT670
General description
The 74HC/HCT670 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT670 are 16-bit 3-state register files organized as 4 words of 4 bits each. Separated read and write address inputs (RA, RB and WA,WB) and enable inputs (RE and WE) are available, permitting simultaneous writing into one word location and reading from another location. The 4-bit word to be stored is presented to four data inputs (D0 to D3). The WA and WB inputs determine the location of the stored word. When the WE input is LOW, the data is entered into the addressed location. The addressed location remains transparent to the data while the WE input is LOW. Data supplied at the inputs will be read out in true (non-inverting) form from the 3-state outputs (Q0 to Q3). Dn and Wn inputs are inhibited when WE is HIGH.
Direct acquisition of data stored in any of the four registers is made possible by individual read address inputs (RA and RB). The addressed word appears at the four outputs when the RE is LOW. Data outputs are in the high impedance OFF-state when RE is HIGH. This permits outputs to be tied together to increase the word capacity to very large numbers.
Design of the read enable signals for the stacked devices must ensure that there is no overlap in the LOW levels which would cause more than one output to be active at the same time. Parallel expansion to generate n-bit words is accomplished by driving the enable and address inputs of each device in parallel.
Features
- Simultaneous and independent read and write operations
- Expandable to almost any word size and bit length
- Output capability: bus driver
- ICC category: MSI
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74HC670D | 74HC670D | 9337 149 30652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HC670D
| week 4, 2004 |
| 74HC670D | 74HC670D-T | 9337 149 30653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HC670D
| week 4, 2004 |
| 74HC670DB | 74HC670DB | 9351 902 30112 | Volume production | SOT338-1
(SSOP16) | Tube | Standard Marking | 74HC670DB
| week 17, 2005 |
| 74HC670DB | 74HC670DB-T | 9351 902 30118 | Volume production | SOT338-1
(SSOP16) | Reel Pack, SMD, 13" | Standard Marking | 74HC670DB
| week 17, 2005 |
| 74HC670N | 74HC670N | 9336 698 60652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HC670N
| Always Pb-free |
| 74HCT670D | 74HCT670D | 9337 154 10652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HCT670D
| week 4, 2004 |
| 74HCT670D | 74HCT670D-T | 9337 154 10653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HCT670D
| week 4, 2004 |
| 74HCT670DB | 74HCT670DB | 9351 902 20112 | Volume production | SOT338-1
(SSOP16) | Tube | Standard Marking | 74HCT670DB
| week 17, 2005 |
| 74HCT670DB | 74HCT670DB-T | 9351 902 20118 | Volume production | SOT338-1
(SSOP16) | Reel Pack, SMD, 13" | Standard Marking | 74HCT670DB
| week 17, 2005 |
| 74HCT670N | 74HCT670N | 9336 704 90652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HCT670N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74HC670D | 9337 149 30652 | 0.5600 | not available | |||||
| 74HC670D | 9337 149 30653 | 0.5600 | Order samples | |||||
| 74HC670DB | 9351 902 30112 | 0.6300 | NA | DIGI-KEY CORPORATION | 1,092 | 11/21/2008 | Buy online | not available |
| 74HC670DB | 9351 902 30118 | 0.6300 | Order samples | |||||
| 74HC670N | 9336 698 60652 | 0.6500 | Order samples | |||||
| 74HCT670D | 9337 154 10652 | 0.5600 | not available | |||||
| 74HCT670D | 9337 154 10653 | 0.5600 | Order samples | |||||
| 74HCT670DB | 9351 902 20112 | 0.5600 | NA | DIGI-KEY CORPORATION | 791 | 11/21/2008 | Buy online | not available |
| 74HCT670DB | 9351 902 20118 | 0.5600 | Order samples | |||||
| 74HCT670N | 9336 704 90652 | 0.6600 | Order samples |
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC670D | SOT109-1
(SO16) | 4 x 4 Register File (3-State) | 17@5V | 2.0-6.0 V | 16 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC670DB | SOT338-1
(SSOP16) | 4 x 4 Register File (3-State) | 17@5V | 2.0-6.0 V | 16 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC670N | SOT38-4
(DIP16) | 4 x 4 Register File (3-State) | 17@5V | 2.0-6.0 V | 16 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HCT670D | SOT109-1
(SO16) | 4 x 4 Register File; TTL Enabled (3-State) | 23 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 6 mA |
| 74HCT670DB | SOT338-1
(SSOP16) | 4 x 4 Register File; TTL Enabled (3-State) | 23 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 6 mA |
| 74HCT670N | SOT38-4
(DIP16) | 4 x 4 Register File; TTL Enabled (3-State) | 23 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 6 mA |
Similar products
74HC/HCT670 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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